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MESOZOIC FOSSILS.
VOLUME I.

PART I1[.~——()n the Fossils Q;/" the Coal-B(2(m:'n.g Deposits of the Queen
Charlotte Islamls (?0Zl(?(M(Z by Dr. G. M. D((ZU8()IZ in 1878, I

J. F. \VI-IITE.»\'\/WIS, F.G.S., F.R.S.C., ETQ,
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M O N T R E A L :
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GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA
ALFRED R. c. SELWYN, L.L.D., F.R.S., F.G.S., DIRECTOR.

MESOZOIC FOSSILS.
VOLUME’ I.


PART HI.—0n the Fossils of the Coal-Bearing Deposits of the Queen
Charlotte Islands eolleeted by Dr. G. M. Dawson in 187 8,
J. F. WHITEAVES, F.G.S., F.R.S.C., ETC.,
PALZEONTOLOGIST AND ZOOLOGIST, G. & N. H. S. C.


PRINTED FOR THE GOVERNMENT OF CANADA.
DAWSON BROTHERS, PUBLISHERS,
M O N T R E A L :
APRIL, 1884.
The publication of the present report has been much delayed, first,
by the removal of the Museum and Offices of the Survey from Montreal
to Ottawa in 1881, next by the death of Mr. J. H. Balbirnie, who was
to have lithographed the plates, in the. spring of 1883, and lastly, by
the resignation of the artist, Mr. A. H. Foord, which practically took
place on the first of June, 1883.
Most of the text has been written and four of the plates have been
printed off more than twelve months ago.
Plate 33 will be issued with Part 4, which is now in course of pre-
paration, and which will complete the volume.
ALFRED R. O. SELWYN.
GEOLOGICAL AND NATURAL H1sToRY SURVEY OFFICE,
Ottawa, March 25th, 1884.
GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA.
MESOZOIC FOSSILS.
BY J. F. WHITEAVES.
VOLUME I.
III. On the Fossils of the Coal-Bearing deposits of the Queen Charlotte
Islands collected by Dr. G. M. Dawson in 1878.
INTRODUCTORY REMARKS.
In 1872 Mr. James Richardson visited the Queen Charlotte Islands
on behalf of the Geological Survey of Canada and spent a few days in
the examination of the Coal mines at Cowgitz and of the geological
structure of Skidegate Inlet. A description of his observations on this
occasion will be found on pages 56-65 of the Report of Progress of the
Survey for 187 2-73. As pointed out in the first part of the present
volume, in which the species were described and figured, the small
series of fossils collected by Mr. Richardson from these coal-bearing
deposits was scarcely sufficient to establish the exact geological hori-
zon of the latter.
Six years later a much more extended geological and geographical
exploration of the Queen Charlotte Islands was made by Dr. G. M.
Dawson, who has since published a detailed account of the results of
his explorations and of the conclusions arrived at therefrom in the
“Report of Progress ” of the Canadian Survey for 1878-79, to which
the reader is referred for the fullest and latest information on the
subject. .
The following tabular view of the formations which have been
recognized in these islands, in descending order, is condensed from
that given on page 48 B of the volume just cited, with some slight
additions and alterations suggested by Dr. Dawson.
24-3-"84.
1
192
FORMATIONS RECOGNIZED IN THE QUEEN CHARLOTTE ISLANDS.
L
Posr PLIOCENE.
Unconformity, with evidence of some fiexure and disturbance of Tertiary beds.

,___—
TERTIARY, probably Mrocnnn.
Complete unconformity, with evidence of great disturbance. Chief period of
mountain making.

I’ A. Upper Shales and Sandstones . . . . . . . . . . . . . . 1,500 feet.
B. Coarse Conglomerates . . . . . . . . . . . . . . . . . . . .. 2,000 “
CRETACEOUS. { C. Lower Shales and Sandstones, with coal. . . . 5,000 “
| D. Agglomerates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,500 “
LE. Lower Sandstones . . . . . . . . . . . . . . . . . . . . . . .. 1,000 (1?) “
Total . . . . . . . . . . . . . . . . . . . . . . . . 13,000 feet.

Unconformity, but without evidence of great disturbance.
Tnmssrc, with probably also some CARBONIFEROUS rocks.

Preliminary lists of the Post Pliocene, Tertiary, Triassic and Palaeo-
zoic fossils, prepared by the writer, are given in Dr. Dawson’s report.
By far the largest number of fossils collected by Dr. Dawson, however,
consisting of upwards of one thousand specimens, are from the Newer
Mesozoic strata of Skidegate and Cumshewa Inlets. which can now be
shown to be of Cretaceous rather than of Jurassic age. An illustrated
description of the various species obtained from these Cretaceous rocks
will form the subject of the present memoir. As shewn on the geolo-
gically coloured map of the islands which accompanies Dr. Dawson’s
report, the Cretaceous rocks from which the fossils now to be
described were obtained occur in the form of a belt averaging nearly
fifteen miles in breadth, which crosses the centre of the group some-
what obliquely and which extends from Cumshewa and Skidegate
Inlets, on the east side, to the west coast. '
The fossils from the purely local divisions A to E, inclusive, of the
Cretaceous rocks as given in the preceding tabular view of forma-
tions and in Dr. Dawson’s report will be described separately in the
following pages, in descending order, the localities for each species
and the exact horizons from which they were collected being of course
givenzon the authority of the collector.
193
DESCRIPTION OF SPECIES.
1.—FRoM THE “UPPER SHALES AND SANns'.roNEs,” 0R SUB-DIVISION A. or
DR. G. M. DAwsoN’s Rnronr.
INocERAMUs PROBLEMATICUS, SOIILOTHEIM.
Ostraeites labiatus, Schlotheim. -1813. Bronn’s J ahrbuch, Vol. VII, p. 93.
Teste Stoliczka.
Mytilites problematicus, Schlotheim —1820. Petrefactenkunde, Vol. I., p. 302.
Mg/tiloides labiatus, Bronginart. —1822. Cuvier’s Ossemens Fossiles, pl. 3,
fig. 4, in Geol. des Env. de Paris.
Inoceramus my/tiloides, Ma11tel1. --1822. Geology of Sussex, p. 215, pl. 27,
fig. 2, and pl. 28, fig. 2.
“ “ Sowerby. -1823. Mineral Conchology, Vol. V., p. 62,
pl. 442.
“ “ Goldfuss. --1836. Petrefactae Germanicae, Vol. II. p.
188, pl. 113, fig. 4.
Inoceramus problemat'ic'us, d’Orbigny.—1843. Paléontologie Francaise, Terr. Crét.
Vol. III. p. 510, pl. 406.
“ “ Meek & Hayden.—1857. Proceedings of the Academy of
Natural Sciences of Philadelphia, Vol.
IX. p. 119.
“ “ Meek.—1876. Report on the Invertebrate Cre-
taceous and Tertiary Fossils of the
Upper Missouri Country, p. 62, pl. 9,
figs. 3a—b.
Inoceramus pseudomytiloides, Schiel, —1855. Pacific Railroad Reports,Vol. II. p.
108, pl. 3, fig 8.
Skidegate Inlet, Shore between Slate Chuck Brook and Lina Island:
five specimens. According to Dr. G. M. Dawson the typical locality
of Subdivision A.
Point North of Lina Island, in Bear Skin Bay——thrce specimens.
Dr. G. M. Dawson says: “This place is coloured as C on the map,
but the beds are disturbed, and they may not actually belong to this
subdivision. Their lithological character certainly resembles that of
the Upper Shales, but this does not go for much.”
The specimens collected by Mr. Richardson from the Upper Shales
of Graham Island near Cowgitz, and mentioned on page 79 of this
volume as being possibly referable to I. eoneentrieus, are now known
to belong to the present species.
- In Great Britain and Europe I. problematieils is stated to occur in the
Lower or Grey Chalk, the Turonien of d’Orbigny, and in the Upper
194
Green Sand or Cenomanien. In the United States it is said to be most
frequently met with in the Niobrara Division, but it is also sometimes
found in the Fort Benton Group.

2.—FROM THE COARSE CONGLOMERATES, on SUBDIVISION B. or DR. G. M.
DAws0N’s Rnronr.
The only fossil ~yet obtained from these conglonlerates is a worn
fragment of the guard of a Belemnite which it is impossible to deter-
mine specifically.
3.——FROM run Lowna SHALES AND SANDSTONES, on SUBDIVISION C. or
DR. G. M. DAwsoN’s Rnroar.
CEPHALOPODA.
BELEMNITES nrmsus, Meek and Hayden.
Plate 22, fig. 1.
Belemnites densus, Meek & Hayden.-1858. Proceedings of the Academy of
Natural Sciences of Philadelphia, p. 58,
and do. for 1860, p. 418.
“ “ -1865. Palaeontology of the Upper Missouri,
p. 126, 'pl. 4, figs. 10 a, b, c, and P1. 5,
figs. 1 d, c, f, coet. exclus.
Meek.—1876. Simpson’s Report on Explorations
across the Great Basin of Utah, Rep.
on the Palaeontological colections, p.
358, pl. 3, figs. 4 a, b.
Bclemnites, Sp. Undt. -—This volume, p. 11, woodcut fig. 1, and
pl. 1, figs. 1, 1a, 1b and 10.
Guard comparatively short and thick, increasing rapidly in breadth
from the point to a distance of about one-half or three-quarters of an
195
inch and then becoming subcylindrical and of nearly uniform thick-
ness. Apices of guard and phragmocone eccentric and placed nearest
to the siphonal side. Alveolar cavity oceuping much more than one-
half of the entire guard: outline of transverse section at the thickest
end nearly circular, but a little flattened at the sides.
Length of the only specimen collected, sixty millimetres; maximum
breadth of the same, at the larger end and from the siphonal to the
antisiphonal side, twenty-one and a-half millimetres.
“ Coal locality, South side of Skidegate Channel, from base of
Subdivision C.” Dr. G. M. Dawson. One distorted, imperfect, and
badly preserved example.
In the Queen Charlotte Islands, as in the Black Hills of Dakota, the
few and imperfect guards of Belemnites which have yet been collected
appear to be readily separable into two sets, viz., into those which are
short and comparatively thick, and into those which are long and com-
paratively slender. The Skidegate representatives of the former set
seem to correspond fairly well with the typical form of B. densus from
Dakota, while specimens of the latter set from the same locality agree
perfectly with slender individuals from the Black Hills which have
been described as a variety of that species, but which Mr. Meek thinks
may be probably distinct and to which therefore it has here been
thought convenient to apply a provisional name.
The apices of the specimen described above and of the one collected
by Mr. Richardson in 1872 are no doubt rather more abruptly pointed
than are those of some of the types of B. densus from Dakota as here
restricted, but no other appreciable difi°ercnce can be detected between
them. Moreover, the Utah specimen of B. densus figured by Meek is
quite as abruptly pointed as the one from Skidegate Inlet represented
on Plate 22. The guard of the specimen collected by Mr. Richardson
and described on pages 11 and 12 of the present volume has a faint
apical groove on the siphonal and presumably ventral side, but the one
obtained by Dr. Dawson, which is larger as well as proportionally
shorter and thicker, has no apical groove.
BELEMNITES SKIDEGATENSIS. (Nom. Prov.)
Plate 22, figs. 2, 2 a, 2 b and 2 c.
Belemnites densus, Meek & Hayden.——“ Slender variety.” Palaeontology of the
Upper Missouri, p. 5, figs. 1a, b, c, only.
Guard rather long and slender, increasing very gradually in thick-
ness from the point upwards: outline of transverse section at the
196
largest end nearly circular, but compressed slightly and somewhat
obliquely at the sides. Alveolar cavity occupying about one half of
the entire length in average specimens : chambers in the phragmocone
very numerous and approximated: apices of both guard and phrag-
mocone eccentric and placed nearest to the siphonal side. Apex of
guard in some specimens with, and in others without, a narrow faint
groove on the siphonal side.
Length of the most perfect specimen collected: seven and a half
centimetres; diameter of the same, from the siphonal to the anti-
siphonal side, at the largest end, fourteen millimetres.
Skidegate Inlet, East side of Alliford Bay, three specimens; also
South side of same bay, four specimens; all from rocks which Dr.
Dawson regards as near the base of Subdivision C.
0n page 127 of the “Palaeontology of the Upper Missouri,” after
describing the typical form of Belemnites densus, and discussing its
probable afiinities, the following remarks are added by Mr. Meek :—
“Along with these large specimens” (of B. densus) “ we find several
smaller ones, having a proportionally more slender form and a more
nearly central axial line. Some of these also have a quite distinct,
though narrow, ventral groove, while their transverse section varies
from subcircular to oblong-oval. These, we suspect, belong to a dis-
tinct species, but, without better and more extensive collections for
comparison, we have not been quite able to satisfy ourselves that they
may not be younger individuals of the more robust form. These two
varieties appear to bear exactly the same relations that the large and
small specimens of B. Panderianm, figured by d’Orbigny, do to each
other.” In the “explanations of plate V.” of the same volume, Mr.
Meek goes a little farther than this, and adds a statement to the effect
that the slender Belemnite from Dakota, represented by figures 1h and
12' of that plate, which has “ a distinct ventral furrow,” may possibly
belong to a different species to those from the same locality, which are
equally slender but which have no ventral furrow.
The seven specimens collected by Dr. G. M. Dawson at Skidegate
Inlet, and to which the name B. Skzdcgatensis has been provisionally
applied, have no distinct median ventral furrow, but only a faint apical
groove on the siphonal and therefore possibly ventral side.
It is worthy of note that the short and thick form of the Belemnites
Panderianus of D’Orbigny, to which Eichwald has given the name
B. curtus, and which Meek thought that B. densus was intimately
related to, is regarded by Eichwald in the “ Lethaea Rossiea " * as a
Neocomian rather than a Jurassic species.

* Volume 2, page 100.
197
In addition to the guards already described, three large and de-
tached phragmocones of Belemnites, or portions of phragmocones, were
collected by Dr. G. M. Dawson, on the south side of Alliford Bay, and
one on the north shore of Oumshewa Inlet. The most perfect of these
is about three inches in length by one inch and three quarters in
diameter at the larger end, and one inch at the smaller. These speci-
mens may have formed part of very large individuals of B. densus, but
they do not possess any characters by which they can be identified.
NAUTILUS SUCIENSIS, Whiteaves.
Plate 21.
Nautilus, Sp. Undt.
Nautilus Sueiensis, Whiteaves. -—This volume, page 14. Ib., page 97, plate 11,
figs. 1 and la.
Six large ribbed Nautili which are specifically identical with the
fine specimen of a Nautilus obtained by Mr. Richardson in 1872 and
described on pages 14 and 15 of the present volume, were collected by
Dr. Gr. M. Dawson at two localities in Skidegate Inlet. On examina-
tion and comparison, these specimens appear to represent only a rather
finely ribbed and stratigraphical as well as local variety of the N.
Sucz'ensis from the Sucia Islands, a species which was based on one
nearly entire but comparatively small specimen with the nacreous
layer of the test only preserved, and a fragment of the cast of a much
larger individual. The following is an amended description of the
Queen Charlotte Island variety of the species :-
Shell large (the maximum diameter of the largest specimen being
fully seven inches) inflated, subglobose but always depressed in the
centre of the umbilical region, periphery broadly rounded, sometimes
flattened or even slightly concave in the middle. Inner whorls com-
pletely covered by the last volution, umbilicus closed or nearly so
when the test is preserved, its place being occupied by a narrow but
somewhat deep depression or pit,-—small and funnel-shaped in the
cast. Aperture subcircular, (or in some specimens almost subquadrate)
and rather deeply emarginated by the encroachment of the preceding
volution. Surface of the outer whorl marked by numerous (about sixty)
flattened, radiating ribs, which curve boldly forwards over the outer
half of the sides and backwards on the periphery, upon which latter
each rib forms a moderately deep but scarcely angular sinus. Test
thick.
198
Septa approximated, from twentynto twenty-two in the whorl near-
est to the aperture: margins of the septa, as seen on the cast, slightly
flexuous, gently convex next the umbilical perforation, concave on and
towards the outer half of the sides, and straight or slightly convex on
the periphery. Siphuncle nearly central, but placed a little on the
inner side of the centre of each septum.
Exact localities: Skidegate Inlet one mile and three-quarters south-
west of Welcome Point, and Bay east of Alliford Bay.
Genus Srraocnms, Meek.
Report on the Invertebrate Cretaceous and Tertiary Fossils of the Upper
Missouri Country. Washington, 1876. Pages 485 and 486.
Shell somewhat resembling that of Helicoceras, as typified by H.
ammlatum, d’Orbigny, but differing therefrom in “its more closely
coiled volutions, more produced spire and particularly in consequence
of having the costae that cross its siphonal side, with nodes placed
between them, so as to form three longitudinal rows along this outer
surface.” “ It is also much larger and more robust than d’Orbigny’s
types of HeZic0ceras.” Type of the genus, Turrilites Robertianus,
d’Orbigny.’*<
Srmocnaas OARLOTTENSE. (N. Sp.)
Shell apparently either sinistral or dextral, large, the largest frag-
ment known, which consists of nearly the whole of one volution, being
at least six inches in diameter. Cavity in the centre of the whorls,
which corresponds to the umbilical perforation, equal to about one-
third of the entire breadth of the base: outline of aperture nearly
circular. Outer surface of the later whorls marked by transverse
rows of broad, low, rounded tubercles or nodes, which alternate with
two simple ribs. In each of the transverse rows there are four
tubercles or nodes, one above and three below the siphuncle. The
simple ribs which alternate in pairs with each row of nodes are trans-
verse also, but they curve back slightly in passing over the siphuncle.
In a fragment which probably belongs to this species and which con-
sists of portions of two of the earlier whorls, the rows of tubercles are
represented by rows of conical spines, which latter are about two lines
in height. Septum unknown.
North shore of Cumshewa Inlet: two large septate fragments, each
consisting of nearly an entire whorl, but both so badly water worn

* Paléontologie Francaise- Terrains Crétacés, vol. 1, page 585. Atlas, plate 142.
199
that most of the finer details of their sculpture and septation are
obliterated, and which therefore are not figured.
The earlier whorls of what appears to have been a young individual
of the same species are partly shewn in a much smaller specimen from
the same locality, which has much the appearance ofa small Turrilites,
except that its volutions are not in contact. The specimen consists of
a nodule of argillaceous limestone, so broken as to expose one entire
but exfoliated whorl, with the impression of the lower half (or more)
of the one which preceded it. The larger of these two whorls shews
no remains of either tubercles or spines, but the mould of the basal
portion of the upper and smaller whorls exhibits the impressions of
four transverse rows of spines, with three spines in each row. As all
the remains of spines that happen to be visible in this specimen are
placed apparently below the siphuncle, and as the larger examples
shew three tubercles below the siphuncle and one above it, in each
transverse row, it seems probable that in the earlier whorls there was
originally one spine in each transverse row, above the siphunclefas
well as three spines in each row below it.
The specimens for which the above name is proposed are similar in
many respects to the European type of the genus, but on the whole
seem to be sufliciently distinct to warrant their separation. On the
later volutions of the present species there appear to be invariably four
tubercles or nodes in each transverse row and its earlier whorls were
probably spinose, whereas in the later whorls of the European Turrz'-
lites Robertianus there are only three tubercles in each transverse row,
and its earlier volutions are represented as marked by similar tubercles,
though of course by much smaller ones.
Annomrns (Auctorum.)
The above name being now generally and as it would seem properly
restricted to the three-keeled group of shells of which Ammonites
bisulcatus of Bruguiere is the type, can no longer be applied with pro-
priety to any Cretaceous species.
One of the most satisfactory as well as one of the most recent
attempts at a re-classification of the great order Ammonea of Lamarck
is the one published by Dr. Paul Fischer in the first volume of his
“Manuel de Conchyliologie,”* whose nomenclature and arrangement
will be adopted, with one or two unimportant exceptions, in the follow-
ing descriptions of the various species of Ammonites collected by Dr.
G. M. Dawson at the Queen Charlotte Islands.

* Paris, 1881.
200
(Amaltheidaa)
SCHLOENBACHIA INFLATA, Sowerby. (Sp.)
Ammonttes iaflatus, Sowerby. -1817. Mineral Conchology pl. 178.
“ rostratus, Sowerby. —-1817. “ “ pl. 173.
For the full synonymy of this species,
which is too long to insert here, see
Pictet & Campiche’s Paléontologie
Suisse, “ Description des Fossiles du
Terrain Crétacé des Environs de
Sainte Croix,” Premiére Partie, pages
178 and 179.
Bear Skin Bay, Skidegate Inlet : a well preserved and very charac-
teristic cast, which, however, does not shew the septation.
The specimen measures five inches and three-quarters in its great-
est diameter and the maximum width of its umbilicus is two inches
and a quarter. Its volutions are somewhat squared, and the outer
whorl is ornamented by twenty-one large, widely distant and nodul-
ous ribs, which are interrupted or cut through, on the centre of the
periphery, by a simple, narrowly rounded and moderately prominent
keel. The ribs are mostly simple but occasionally they bifurcate, and
on the inner or posterior half of the outer volution they bear four
tubercles or nodules on each side of the keeled periphery. On the
outer or anterior half of the same volution and especially near the
aperture the ribs bear only three tubercles on each side of the peri-
phery, the two inner ones being nearly obsolete, while the outer one
rises to a height of fully ten millimetres.
Srnnnomscns MAUDENSIS. (N. Sp.)
Plate 22, figs. 3, 3a, and 3b.
Shell compressed lentieular: periphery minutely and inconspicuously
carinated, the keel being simple, entire, very narrowly rounded, and
with parallel sides: inner whorls almost entirely concealed: umbilicus
small, about one-tenth of the greatest diameter, with nearly vertical
201
sides and a subangular margin. Aperture narrowly sagittate or
lanceolate with a basal truncation, deeply emarginated by the preceding
volution, outside of which emargination its height is more than twice
its maximum breadth. Surface smooth. Septum consisting of six
lobes and six saddles on each side, not counting the minute siphonal
saddle. Siphonal lobe about equal in height to the first lateral, and
composed of two main branches (one on either side of the siphuncle),
each of which is trilobate at is outer extremity. First lateral lobe
scarcely branched, but bearing three minute, irregular toothed lobules,
one on each side. Between the siphonal lobe and the first lateral, there
is an auxiliary lobe about equal in height to the second lateral. The
remaining lobes are simple but minutely incised and decrease gradually
in size and height towards the umbilical margin. Siphonal saddle
unknown, but obviously very small. First lateral saddle much larger
than any of the rest, deeply divided into two spreading branches,
which are variously and unsymmetrically lobed and incised. Second
lateral saddle somewhat deeply lobed and cut at its outer extremity,
but not distinctly branched. The remaining saddles, like the corres-
ponding lobes, are simple but minutely toothed, and decrease regularly
in size towards the umbilical margin. Greatest diameter, rather more
than forty-nine millimetres: width of umbilicus, four and a-quarter
mm.: maximum thickness, eight and a half—mm.
East point of Maud Island, in Skidegate Inlet: one imperfect
example.
This shell is very nearly related to the Ammonites Requienz'anus*
and the A. G0up£Ze'anus'i‘ of d’Orbigny, especially in the character
of its septum. From the former, however, it difl'ers in the minute and
obtuse carination of its periphery. and from the latter by its much
smaller umbilicus.
The septation of S. .Maudensz's is not at all like that of the typical
species of Sjahenodiscus, but the author of that genus is inclined to
think that its characters should be enlarged so as to include such forms
as A. Requienianus. In this connection also, Dr. Fischer writes as
followsj§j: “Le type do cc genre” (Sphcnodiscus) “est l’A. Zobatus,
Tuomey. Le groupe des Gigi/pez'formes de d’Orbigny (type: A. G’oupz'lz'-
anus d’Orbigny) correspond assez bien a la coupe générique proposée
par Meek.”

* Paléontologie Fran;-aise, Terrains Crétacés. Tome 1, p. 315. Atlas. pl. 93.
t “ “ “ “ p. 317. Atlas, pl. 94, figs. 1-3-
1 Manuel de Conchyliologie. Paris, 1881. Vol. I., p. 389.
202
(Lg/toceratidcc.)
LYTOOERAS BATESI, Trask. (Sp.)
Plate 2'7, fig. 1.
Amm0m'tes Bu.te‘s'£t', Trask. —1855. Proceedings of the California _
Academy of Sciences, p. 40.
“ “ Gabb. -1864. Geological Survey of California
Palaeontology, Vol. I., p. 67, pl. 13,
figs. 16 and 16a-b.
“ “ Gabb. -—1869. Idem.,Vol. II., p. 132, pl. 20, fig.
9a, and pl. 21, fig. 10a-b. .
Ammom'tcs crmocostatus, VVhiteaves. ——This volume, p. 45, pl. 9, figs. 2 and 2a.
Bear Skin Bay, Skidegate Inlet: a well preserved but somewhat im-
perfect specimen, whose maximum diameter is four inches and three-
quarters.
A re-examination of the small Ammonite to which the provisional
name of A. crcnocostatus was given on page 45 of the present volume and
which was there stated to be “ perhaps a half-grown specimen of
I/ytoceras Lz'cbz'gi, Oppel,” has convinced the writer that it is only
a young specimen of the Ammonitcs Batesi of Trask, in a somewhat
peculiar state of preservation. The sculpture of A. Batesi, which is
a very typical species of Lytoccras, is thus described by Mr. Gabb on
page 67 of the first volume of the “ Palaeontology of California.”
“ Surface marked by numerous fine, rather sharp, elevated ribs, cross-
ing from the interior of the umbilicus obliquely forwards over the dor-
sum. In some specimens the interspaces are marked by fine revolving
lines. In others these lines are absent.” '
The sculpture of the type of A. crenocostatus, upon which the species
was mainly based, at first sight appears to consist of rather distant,
minutely crenate, transverse raised lines, placed upon the convex
surface of the shell, but upon closer examination it is found that these
crenulations are caused by minute and underlying revolving striae,
which can only be seen in a certain light.
According to Mr. Gabb,* A. Batesi is “the largest known, most
widely diffused, and one of the most variable Ammonites” of the
Shasta Group; or “older beds” of the Cretaceous formation in California,
where it attains to a size of more than a foot in diameter. The same
species seems to have also attained to a considerable size at the Queen
Charlotte Islands, for in a septate fragment collected by Mr. Richard-
son in 1872 at Skidegate Inlet, west of Alliford Bay, which cannot be
distinguished from A. Batesi, the height of the aperture alone is fully

* Palaeontology of California. Vol. II., p. 132.
203
five inches. In this fragment there is no trace of any emargination
of the inner surface of the volution, so that the outer whorls of large
individuals, though closely contiguous, were probably not embracing.
LYTOCERAS SAOYA, Forbes. (Sp.)
Plate 25.
Ammonttes Sacg/a, Forbes. --1846. Transactions of the Geological
Society of London, Vol. VII. p. 113,
pl. 14, fig. 10.
“ Buddha, Forbes. —1846. Idem,, Vol. VII. p. 112, pl. 14.
fiig. 9.
“ Sacya, d’Orbigny. -1850. Prodrome de Paléontologie, Vol.
II., p. 213.
“ Sac;/a, Giebel. —-1852. Fauna der Vorwelt, Vol. III.,
p. 557 and 559.
“ Sacya, Stoliczka. -1865. Palaeontologia Indica, Creta-
ceous Fauna of S. India, Vol. 1., p.
154, pl. 75, figs. 5—7, and pl. 76.
Ammonites filtctuctus, Whiteaves. -1876. This volume, p. 43, pl. 2, figs. 2.
North shore of Cumshewa Inlet, eighteen specimens and some frag-
ments : also Skidgate Inlet, one specimen from each of the following
localities,-viz., Shingle Bay; east side of Shingle Point; Shore one
mile and three quarters south-west of Welcome Point ; and Bay east of
Alliford Bay.
The largest specimen yet collected at the Queen Charlotte Islands is
six inches in its greatest diameter. The reason for regarding A.
filicinctus as a mere synonym of A. Sacya, Forbes, will be found stated
in a foot note to page 104 of the present volume, and this conclusion
is fully sustained by the much larger and in some respects better
series of specimens since collected by Dr. G. M. Dawson.
LYTOCERAS TIMOTHEANUM, Mayor. (Sp.)
Ammonitrs Timotheanus, Mayer. -1847. Pictet et Roux. Mollusques des Gres
Verts,p. 39, pl. 2, fig. 6, and pl. 3, figs. 1, 2.
Jurtntanus, Pictet. -—1847. Idem, p. 41, pl. 3, fig. 3.
“ Timotheanus, d’()bigny. —-1850. Biodrome de Paléontologie Tome 2,
p. 124.
“ “ Pictet. -1860. Paléontologie Suisse, Fossiles de Ste.
Croix,Vol. I, p. 289.
“ “ Stoliezka. -1865. Palaeontologia Indiea. Cretaceous
Cephalopoda of Southern India, p. 146,
pl. 73, figs. 3-6.
“ “ Whiteaves.—-1876. This volume, p. 41, pl. 3, figs. 2 and 2a.
South Island, five specimens : Bear Skin Bay, Skidegate Inlet, two
204
specimens: North shore of Cumshewa Inlet, one fine and nearly per-
fect example, whose maximum diameter is three inches.
(Harpoceratidca)
HAPLOCERAS PEREZIANUM, Whiteaves.
Ammomltes Perezianw, Whiteaves. —-1876. This volume, page 19, pl. 2, figs.
1 and la.
Not Ammonites Perezianus, D’Orbigny.—-1850. Prodrome de Paléontologie, p. 99.
South Island, Skidegate Channel : two tolerably perfect and typical
specimens and two fragments. North shore of Cumshewa Inlet, one
example. .
In the collection there are also two specimens from South Island
which may be referable to this species. The largest of these, whose
greatest diameter is fifty seven millimetres, differs from the typical
form of H. Pcrezianum, as does the smaller one, in having a more
abruptly rounded umbilical margin, and in the greater prominence of
the fiexuous undulations or plications on the sides, which (plications)
frequently bifurcate at a distance about half-way between the umbili-
cal margin and the periphery. These two specimens have evidently very
close afiinities with the Ammonites bicurvatus of Michelin, as figured by
d’Orbigny on plate 84, figure 3, of the “ Terrains Crétacés,” though in
the French species the inner face of the whorls is represented as
squarely truncated and the umbilical margin as acutely angular.
A. Perezianus, nobis, (non d’Orbigny) was originally supposed to be
an Oppelia nearly related to O. subcostaria, Oppel, and O. Waagcni,
Zittel. The specimens obtained by Dr. Dawson, however, seem to
show that it is rather an Haploccras of the type of A. bicurvatus,
Michelin, and of A. Ulcon, d’Orbigny.
As the Ammonites Perezianus of d’Orbigny, from the Neocomian of
the “ departement du Var, de Nice, d’Espagne, etc.,” clearly belongs to
the genus Otcostephanus of Neumayr, there will be no necessity for
any change in the name of the present species.
205
H.irLoeER.4s BEUDANTI, Brongniart.
Plate 26, figs. 1 and la.
Am»mon'itrs Bewlrmti, Alex. Brongniart.—1822. In Cuvier’s Environs de Paris,
pp. 95, 99, pl. 7, 2.
d’Orbigny. 1840. Paléoiitologie Francaise, Terrains
Cietacés, Vol. I., p. 278, pl. 33, figs.
1-3, and plate .
“ “ Pictet. 1860. I’aléontologie Suisse, Fossiles
de Ste Croix, Vol. 1., p. 277, pl- 40.
1-Vith references to other authors.
Stoliczka. -1865. I’ala»ontologia Indica., Creta-
ceous Ceph-alopoda of Southern India,
Vol. I. p. 142, pl. 71, figs. 1—4, and
pl. 72.
“ “ Eichwald. -1868. Lethaea Rossica, Vol. II., see. 2,
p. 1142.
Form A.—Umbili~cal margin rectangular.
Bear Skin Bay, Skidegate Inlet: five specimens, one measuring about
three inches and three-quarters, and the others varying from an inch
and a--quarter to an inch and three-quarters in their greatest diameter.
Form B.-—-Umbilical margin broadly rounded.
North shore of Cumshewa Inlet: upwards of ninety specimens,
most of which are well preserved and nearly perfect, though the outer
lip is never entire, and which vary from one inch and a-half to five
inches and ‘three-quarters in their maximum diameter.
Br01'1g1'1iart’s original description of A. Beudauti is not accessible to
the writer, but Fictet and Eichwald both agree in stating that its um-
bilical. margin is rectangular. Pictet in particular is very explicit on
this point, as may be seen by the following extract from his remarks
on the affinities of that species in the first volume of the Pahéontologie
Suisse :_“ Le earactere le plus fixe et le meilleur, dans notre opinion,
est le forme meme des bords de cet ombilic. Dans l’A. Beudanti les
tours sent plats et ne s’infléchissent pas en dedans. L’ombilie est
bordé, comme nous l’avons dit, par une muraille verticale dent le som-
met est une carene rectangulaire.”*
On the other hand, in most of d’Orbigny’s and Stoliczka’s figures of

* Paléonlologie Suisse. Fossiles du Terrain Crétacés des environs de Sainte Croix. Geneva,
1858-60. Vol. I., p. 279.
206
A. Beudanti the umbilical margin is represented as rounded more or,
less broadly, and in the text which corresponds to these figures the
same part of the shell is nowhere stated to be angulated or carinated.
It would thus appear that there are two forms of the species-one,
which may be the most typical and which for convenience has been
called Form A, in which the inner face of the sides is squarely trun-
cated, especially in the outer whorl, so that the umbilical margin is
rectangular; and the other, or Form B, in which the sides of the outer
whorl slope convexly down to the suture, and in which therefore the
umbilical margin is rounded.
The specimens from Bear Skin Bay, in Skidegate Inlet, which have
already been referred to Form A, correspond perfectly with Pictet’s
figures of A. Bcudanti on plate 90 of the first volume of the “ Paleon-
tologie Suisse.” '
All the specimens of this species from Cumshewa Inlet have the
umbilical margin rounded, and are therefore referred to Form B. They
agree very well in form with most of d’Orbigny’s figures of A. Beu-
danti, especially with figures 1 of plates 33 and 34 of the Atlas to the
first volume of the “ Paleontologie Francaise, Terrains Crétaces.”
The Cumshewa variety of A. Bcudanti occurs in great abundance in
large nodules of argillite. The test is beautifully preserved in these
nodules, but it adheres so tenaciously to the matrix that it is almost
invariably detached from the cast when the nodules are split open.
The cast is marked by distant, very tlexuous and obliquely transverse
constrictions or periodic arrests of growth. In the specimen figured
on plate 26, whose greatest diameter is about five inches and a-half,
there are twelve of these flexuous constrictions on the outer whorl, each
of which consists of a narrow but rather deep groove, which is some-
times partly margined by a rib-like elevation, especially on the inner
side of the groove and near the periphery,——and sometimes not. Small
portions of the test sometimes adhere to the cast-, and ,;such specimens
show that the outer surface of the test is faintly and rather closely
ribbed. The ribs are flexuous and run parallel to the distant constric-
tions on the cast. Near the aperture of the specimen figured, the ribs
on a small piece of the shell which happens to be preserved are rather
more than one millimetre broad, but a little less than two mm.
At Cumshewa Inlet also a cast of a very large species of Haploceras
was collected by Dr. Dawson, which is probably a variety of Form B.
of H. Bcudcmti. The dimensions of this specimen are as follows:
maximum diameter, twenty-two inches; breadth of aperture and con-
sequently greatest lateral diameter of the shell, eight inches ; width of
umbilicus, nearly seven inches. The umbilicus has steep walls, but its
margin is rather rounded than angular. The outer volution is marked

207
by about twenty oblique but nearly straight, narrow and widely dis-
tant, simple raised ribs, which are more or less acute and which
become obsolete upon the periphery. As measured in the centre of
one of the sides of the last whorl, these ribs are one inch and a-half
apart at the commencement of the volution and two inches and a-halt
apart at the aperture. A small fragment of the test which remains on
the periphery shows that the outer surface of the shell is marked by
extremely obscure and rather fine ribs, which average about one line
in breadth near the aperture. .
According to Stoliczkafl< “ Ammonites Beudanti is, in Europe, char"ac-
teristic of the Gault, especially of its middle strata; it is known from
many localities in France, Switzerland, Germany, England and Russia;
and also from the province.of Constantine in Algeria.” In Southern
India it occurs of great size at Odium, Mooraviatoor and Pondicherry, .
and, as has been already stated, it is by far the most abundant of all
the Ammonites collected by Dr. G. M. Dawson at the Queen Charlotte
Islands.
HAPLOGERAS PLANULATUM, Sowerby. (Sp.)
Plate 28, fig. 1.
Ammonites planulatus, Sowerby. -1827. Mineral Conchology, V01-
VI., p. 136, pl. 570, fig. 5. (Not A.
planulatus, Schlotheim.)
Ammonites Mag/orianus. d’Orbigny. -1884. Paléontologie Francaise, Ter-
rains Crétacés, Vol. I., p. 207,
pl. 79.
“ Gauda/ma, Forbes. -1846. Transactions of the Geo-
logical Society of London, Vol.
VII., p. 113, pl. 10, fig. 3.
Ammonites Mag/orizmus, Pietet & Roux. -1848. F ossiles des Gres Verts, p.
37, pl. 2, fig. 5. _
“ Grifiithii, Sharpe. -1854. Fossil Cephalopoda of the
Chalk, p. 28, pl. 11, fig. 3.
“ planulatus, Sharpe. -1854. Idem., p. 29, pl. 12, figs. 3-4.
“ ilfayorianus, Pictet. -1860. Paléontologie Suisse, Fos-
~ siles de Ste. Croix, p. 283
“ planulatus, Stoliczka. -1865. Pa1aeontologiaIndica. Créta-
ceous Cephalopoda of Southern
India, Vol.1. p. 134, pls. 67 and 68
North shore of Cumshewa Inlet: one small specimen about three
inches and a-quarter in diameter, and two large ones, one ten inches
and the otherfully eleven inches in their greatest diameter.

* Palaeont Indica. Cret. Ceph. of S. India, p. 143.
March 25th, 1884. 2
208
Stoliczka says “ the obsoleteness of the ribs towards the umbilicus ”
is “generally very constant in this species,”* and Pictet describes the
ribs as becoming narrow on the inner half of the sides and as disap-
pearing “vers la moitié des fiancs.”'t In the smallest specimen from
Cumshewa Inlet, the original of figure 1 on Plate 28, the ribs are as
strongly marked on the umbilical margin as they are on the peri-
phery, though this remark will not apply to the two large specimens
from the same locality.
The geographical distribution of Haploceras planulatum is very exten-
sive. In the “ Palaeontologia Indica ” it is stated to occur in the
Chalk Marl and Upper Grcensand of England, in the Gault and “ Gres
Verts ” of France, Savoy and Switzerland, and “ it maintains the same
geological horizon of the Middle Cretaceous ” in Germany, Hungary
and the Carpathians. It has also been recognized in the Cretaceous
‘ rocks of the Andes of Venezuela, in strata of the same age at Daghes-
tan, as well as from many localities in Southern India.I
HAPLOCERAS CUMSHEWAENSE. (N. Sp.)
Plate 24, fig. 1.
Shell composed of few (probably of three or four) strongly com-
pressed whorls, which increase somewhat rapidly in size: periphery
narrowly rounded: umbilical margin abruptly truncated at nearly a
right angle to the sides: umbilicus about one-fourth the entire
diameter and exposing one-half of the sides of the inner whorls. Aper-
ture semi-elliptical, nearly twice as high as broad, squarely truncated
at the base and deeply emarginated by the preceding volution.
Surface of the outer whorl marked in the cast by obliquely trans-
verse, fiexuous ribs, which are dichotomous, bi-dichotomous, or trifur-
cating, but rarely simple, also by distant fiexuous grooves or periodic
arrests of growth, which run parallel to the ribs and which can
scarcely be distinguished from the furrows which alternate with each
rib except by their being a little broader and deeper. On the last
whorl of the only specimen collected there would appear to have been
about twelve of these obscurely defined arrests of growth, and the ribs,
which are acute and somewhat crowded, are not quite two millimetres
apart on the periphery near the aperture.
North shore of Cumshewa Inlet: a single fragment.
This shell may be only a variety of the Ammonitcs Brewerii of Gabb,

* Palaeontologia Indica, Fossil Cephalopoda of Southern India, p. 135.
1‘ Paléontologie Suisse, Fossiles de Ste. Croix, Vol. I, p. 284.
I Palaeontologia Indica, Fossil Cephalopoda of Southern India, pp, 136-137.
209
which is known to occur at Skidegate Inlet, but its sculpture appears
to be quite different. The surface of A. Brewerii is described as
\“ variable from nearly smooth, or marked only by sinuous striae, to
strongly costate. the strise assuming the character of irregular ribs,
most marked on or near the dorsum,’”1'< and the ribs of the costate
variety figured by Mr. Gabb are invariably represented as simple.
Haploceras Cumshewaense appears also to be nearly related to the
Ammonites Kandi of Stoliczka, T which Neumayr says is an Olmste-
phanus, I but in the latter species there are said to be only five periodic
arrests of growth in the outer whorl. Q
(Section A._N0rmales.)
STEPHANOCERATIDZE.
The sutural line, the comparative size of the chamber of habitation
and the shape of the outer lip being unknown in all the specimens col-
lected of each of the four following species, it is diflicult to allocate the
latter satisfactorily into their proper genera. From the additional
evidence afforded by the specimens collected by Dr. Dawson it would
however appear that the shells described on pages 29-32 of the pre-
sent volume with doubt as “Form A.” and “ Form B.” of Ammonztes
Loganianus, are probably two distinct species of Stephanoceras, although
Drs. Neumayr and Fischer both regard that genus as confined e,xclu-
sively to re s of Jurassic Age. The Ammonites Skidegatensis described
on pages 3 37 of this volume, seems to be a true Perisphinctes, as
originally supposed, although in its earliest. stages it looks more like
a species of Olcostephanus. The type of A. Logam'anus§ on the other
hand, proves to be a distorted example of an Olcostephanus (N eumayr)
allied to A. Astierianus d’Orbigny, which latter shell is regarded as
the type of his genus, although its ribs are not interrupted on the
periphery. -
STEPHANOUERAS OBLATUM. (N. Sp).
Ammonites Loganianus, Whiteaves Form A. This volume, p. 29, pl. 4, figs.
2 and 2a.
This shell can no\longer be regarded a variety of A. Loganianus,

* Palaeontology of California. Vol. II., p- 130.
t Palaeontologia Indica. Cret. Ceph. S. India, p. 140, pl. 70, figs. 4 and 5a.
1 Sitzb. der k. Akad. des Wissensch, I875, Band 71, p. 41.
§This volume p- 7, pl- 8, fig. 2-
)
210
0
which, as already pointed out, is an Olcostcphanus, but as a distinct
species of Stqvhanoceras remarkable, as is the next also, for its very
close resemblance to some of the Jurassic Macrocephali. It can at once
be distinguished from the type of Olcostephanus Loganianus, as the
latter species is now understood, by its smaller size, its narrow umbi-
licus caused by the much closer enrolment of the whorls, by the almost
complete envelopment of the inner volutions and more especially by
the broad and deep constriction of the outer whorl immediately behind
the aperture.
A perfect specimen of S. oblatum, which differs from the original of
the figures on plate 4 of the present volume only in being a little
smaller, was purchased by Dr. G. M. Dawson from Indians, who stated
that it was found in Skidegate Inlet. \
STEPHANOCERAS enromns. (N. Sp.)
Ammomltes Loganianus, Whiteaves. Form B. This volume, p. 30, pl. 8. figs.
1 and la.
South Island, Skidegate Inlet : a small but well preserved specimen,
whose maximum diameter is about twenty-five millimetres.
This species also seems to differ both generically and specifically
from the Olcostcphanus Loganianus as now restricted. It (the O.
cepoidcs) may be at once recognized by its nearly globose form, by the
close enrolment of its whorls and consequently narrow u bilicus, also
by its sculpture which consists of non-tuberculated an?bifurcating
primary costae, which alternate with simple secondary ribs. The
analogies between this shell and young specimens of Ammonites Ger-
villci, Sowerby, which is likewise a Stephanoceras, have been pointed
out on page 31 of the present volume.
Pnrusrnrnerns SKIDEGATENSIS, Whiteaves.
Ammonitcs Skidcgatensis, Whiteaves. —This volume, p. 34, pl. 7 and pl, 9, fig. 1.
East end of Maud Island: a small but characteristic fragment. An
exquisitely perfect specimen of this shell, which measures two inches
and a-half in its greatest diameter and which is said to have been col-
lected in Skidgate Inlet, was purchased from Indians by Dr. G. M.
Dawson.
211
QLOOSTEPHANUS Loeanmnus, Whiteaves.
Plate 23, figs. 1 and la.
Ammonites Loganianus, VVhiteaves. Type.-This volume, p. 27, pl. 8, fig. 2.
Stephanoceras Hurrtplrreysianum, Hyatt. -Geological Survey of Canada, Re-
port of Progress, 1876-77,p. 156:
but not Ammom'tes .Humphreysc'a-
nus, Sowerby.
South side of Alliford Bay, in Skidegate Inlet: four well preserved
but imperfect specimens.
The type of Ammonites Loganianus is a badly distorted cast, which
gave a very incorrect idea of the number of the volutions of the shell,
of the true amount of their involution, and consequently of the pro-
portionate width of the umbilicus. A nearly perfect specimen of this
species has since been collected by Dr. G. M. Dawson, at Sigutlat Lake,
B.C., which is figured on plate 23, and this, together with the specimens
from Alliford Bay, enable the description of its characters given on
pages 27-29 of the present volume to be amended as follows :
When perfect and undistorted, the shell appears to have been com-
posed of about five rounded volutions, which are so lightly enrolled
that more than one-half of the sides of the inner ones are exposed.
In some specimens the outer whorl is somewhat compressed on the
periphery, and in others the sides are slightly compressed. The um-
bilicus is broad and open, but its margin is indistinctly defined. A row
of tubercles on the last volution, from which the primary ribs tri-
furcate, appears to represent its outer boundary, and assuming this to
be the case, then the maximum width of the umbilicus is equal to
fully two-thirds of the entire diameter. * The aperture is usually,
though not always, broader than high, transversely reniform or sub-
crescentic in outline, and shallowly as well as concavely emarginated
at its base by the encroachment of the preceding whorl. The surface
is regularly ribbed, and the costation consists of primary trifurcating
ribs, with one or two secondary ribs intercalated between each pair of
primaries. On the outer whorl the primary ribs commence at the
suture and extend nearly half-way across the sides to the outer
boundary of the umbilicus, as simple, broad, and distant costte; then
at the umbilical margin each primary rib trifurcates from a trans-
versely elongated and rather prominent tubercle before passing over
the periphery. On the same volution the secondary ribs are confined
to the outer half of the sides. From this disposition of the ribs it
follows that there are usually four or five times as many on the
periphery as there are between the umbilical margin and the suture.
212
The maximum diameter of the largest and most perfect specimen
known (that from Sigutlat Lake), is rather more than four inches and
and a-half, and the number of primary ribs on its outer whorl is thirty-
two. The septation of the species is still unknown.
0. Loganianus belongs to the same setion of the genus as the O.
Astierianus (which is the Ammonites Asticrianus of d’Orbigny and
Pictet), but its volutions are much more loosely involute, and its
umbilicus is far more wide and open. The primary ribs of the outer
whorl of O. Loganianus, also trifmcate on the middle of the sides, and
not comparatively near the suture, as they do in O. Ast2'erz'anus.
(Section B.-Evolutaa.)
ANCYLOCERAS REMDNDI, Gabb,
Plate 28, figs. 2 and 2a.
Crioceras (Ancyloceras ?) Rémondi, Gabb. -1864. Palaeontology of California,
Vol. I., p. 75, pl. 14, figs. 24 and
2401.
Ancyloceras Rémondi, Gabb. --1869. Idem., Vol. II., p. 188 and
213, pl. 24, fig. 19.
North shore of Cumshewa Inlet, two specimens, the largest of
which is figured.
This species is thus described by Mr. Gabb, in the first volume of
the Palaeontology of California: “ Discoidal ; whorls inreasing rapidly
in size, flattened on the sides; dorsal surface narrow, convex; ventral,
flat or very slightly concave. Transverse diameter less than half
the dorso-ventral. Space between contiguous whorls narrow, but
well marked. Surface marked by numerous small fiexuous ribs, of
about equal size, which arise on the ventral margin of the whorls
and pass entirely across the back: these ribs are often dichotomous,
and occasionally, though rarely, anastomose near the dorsum. In
one case remains of a few dorsal spines were observed. These were
placed in two rows, one on each side of the back. The ventral surface
is finely striate transversely, the striae arching forwards. Of the
septum, I have only been able to see the dorsal and superior lateral
lobes, and their corresponding saddles.”
The specimens of A.'Re'mondz' from Cumshewa Inlet appear to differ
only from the Californian type of the species in being much larger,
and in the circumstance that their ribs are more distant and very
rarely dichotomous.
213
HAMITES (?) GLABER. (N. Sp.)
Plate 24, figs. 2, 2a, 2b, and 20.
Shell, so far as known, consisting of two straight and parallel
limbs of nearly equal size, one of which is bent so closely on the other
that the inner surfaces of both are nearly or quite in contact. Sides
of both limbs compressed, so that the outline of a transverse section
of either would be elliptic ovate, the siphonal edge being slightly
narrower than the antisiphonal. Surface apparently smooth, but
marked at widely distant intervals by an occasional arrest of growth
in the shape of a broad, but faint and shallow, flexuous and transverse
constriction, which is obliquely ascending on the antisiphonal half of
the limb and nearly straight on the siphonal half.
Each septum in its entire circumference consists of six bipartite
saddles and five bipartite lobes. The siphonal saddle is small and
simple, though its summit is minutely three-lobed and its sides thrice
incised. The three lateral saddles are nearly equal in size, but the
second is a little higher than the first, and the third than the second.
They are not at all alike in their ramifications, the second or central
saddle being twice bipartite and symmetrically or equally divided, while
the first and third saddles are unequally divided throughout, the largest
half in each case being that which is nearest to the second saddle. At
the base of each of the bipartite saddles there is a short incised spur or
offset from each side of the stem. Between the first and second and
between the second and third lateral saddles there is a small and
simple but laterally incised supplementary saddle, but there is none
between the siphonal saddle and the first lateral.
The siphonal lobe is equally and twice bipartite. The first and second
lateral lobes, which are nearly equal in size and which are slightly
la:rger than the siphonal lobe and much larger than the antisiphonal,
are unequally divided throughout. The first lateral lobe is deeply but
unequally twice bipartite above, and its stem bears a pair of simple
incised branchlets in the middle. The second lateral lobe is deeply
divided into two branches of very unequal size, one of which is simply
cleft at the summit, while the bther is again deeply divided into two
branchlets whose apices are also cleft. The antisiphonal lobe is strictly
symmnetrical, its extremity being regularly trifurcate and the centre
of the stem deeply constricted. Alternating with each of the primary
and bipartite lobes there is a single but much smaller supplementary
lobule, which although incised is not branched.
North Shore of Cumshewa Inlet: three well preserved but fragment-
ary casts, all of which are figured.
-214
In the Palaeontology of California* Mr. Gabb describes a shell which
he refers with much doubt, first to the genus Ptychoceras or Hamitcs,
and finally to Ancyloceras under the name A. quadratus, which resem-
bles the present shell in its septation, as well as in the fact that its
surface is said to be marked with distant periodical constrictions. The
outline of a transverse section of A. guadratus, however, is described
as sub-quadrate and its sculpture is represented as consisting of “very
small rounded ribs.” The specimens described above are so imperfect
that it is impossible to say whether they should be placed in the genus
Hamites, Ptychoceras, Hamulina, Ancylaceras, or Anisoceras, but their
sculpture, apart from the periodic constrictions, appears to have been
smooth, and they are certainly elliptic ovate in transverse section.
GASTEROPODA.
Nniunzm MAUDENSIS. (N. Sp.)
Plate 27, figs. 2, 2a., 2b, 2c, and 2d.
' .
Shell turreted, very long and slender : whorls exceedingly numerous,
the early ones obliquely flattened or slightly depressed, the later ones
concave in the middle and highest at the suture: suture very indis-
tinct, placed in the centre of a prominent and continuous spiral ridge,
which is rounded at the summit. Outline of aperture unknown. Sur-
face of the later whorls encircled by from six to seven fine and thread-
like spiral raised lines. Longitudinal sections show that a triangular
and acutely pointed spiral ridge or fold revolves around the inner sur-
face of the outer wall of all the volutions.
East end of Maud Island, opposite Leading Island, in Skidegate
Inlet: not uncommon in brittle and very friable shale.
As the shale breaks readily in all directions when dry and as the
species is long, slender and fragile, the large specimens, which are
often much distorted, are invariably broken. The length of the largest
fragment collected (fig. 2), which consists of six of the lower volu-
tions, is forty-five millimetres, and its breadth is nine mm. at the
smallest end and seventeen mm. at the largest. A very young indi-
vidual (fig. 2b), whose apex is unusually perfect and which measures ‘
sixteen mm. (or five-eights of an inch) in length, and a little less
than five mm. in breadth at the larger end, has as many as fourteen

* Volume 1, pp. 74 and 75, pl. 14, fig. 21a, pl. 15, fig. 21: also volume 2, p. 213.
215
volutions. Another immature specimen (fig. 20), whose apex is not
quite perfect, and which measures twenty-nine mm. (or an inch and a
quarter) in length and eight mm. at the larger end, has eleven volutions
preserved. The entire number of volutions was probably about twenty.
This species belongs to the sub-genus Ncrinella of Sharpe.
CERITHIUM SKIDEGATENSE. (N. Sp.)
Plate 27, figs. 3 and 3a.
Shell small, not much exceeding half an inch in length, pupiform,
turreted but not much elongated, the length being about twice the
greatest breadth: whorls six or seven, the earlier ones obliquely com-
pressed, the later ones more cylindrical: spire not much longer than
the last whorl preserved, and possibly not any longer than the body
whorl, which is more or less broken in all the specimens collected:
suture angularly but not very deeply impressed. Surfaee marked by
rows of beaded or tuberculated spiral raised lines. On the two last
volutions but one there are four rows of nearly equidistant, prominent
and regularly rounded tubercles. On the upper or posterior half of
the last volution preserved there are also four rows of bead-like
tubercles, and on the lower or anterior half of the same volution there
are three or four spiral raised lines, the uppermost of which is
indistinctly tuberculated.
Length of the most perfect specimen (in which part of the body
whorl is broken off,) eight millimetres; breadth rather more than
three and a-half mm. ; length of the last whorl (which is imperfect)
nearly four mm. - ' .
East end of Maud Island, opposite Leading Island : five or six well
preserved but imperfect specimens.
Vxmxouo PULCHELLA. (Nom. prov.)
Plate 27 , figs. 4 and 4a.
Possibly a variety of I/yosoma Powellt, White.
Comp. Nerttina .9 ? Powelli, White. -1876. Powell’s Report on a Geological
Survey of the Uinta. Mountains, p. 110.
“ Lyosoma Powellt, White. -1880. U. S. Geol. Survey, Contributions
to Paleontology, Nos. 2-8, p. 153, pl. 30,
figs. 6, 6a, 6b, 6c, and 6d.
Shell obliquely subovate, its length and breadth being nearly equal :
\
216
volutions about three, increasing very rapidly in size, the last one
being extremely large in proportion to the rest; spire small, short,
obtuse and not raised much above the highest level of the last whorl;
last whorl ventricose and much inflated, especially near and at the
mouth, imperforate at the base and marked by a shallowly concave
spiral groove or constriction above the middle. Aperture large and
wide, nearly circular, but angular at the junction of the outer lip with
the inner margin of the mouth ; peristome thin and nearly continuous,
interrupted only by the encroachment of a small part of the preceding
volution; inner lip simple, columellar margin devoid of callus, plica-
tion, or emargination.
Surface marked with fine and crowded transverse raised lines, and
with prominent and nearly equidistant, transverse rib-like folds. On
the last whorl the rib-like plications and raised lines which alternate
with them in bundles of from three to five or more, extend from the
suture to the base and are not confined to the central and posterior
portion of the volution.
Length, nifie millimetres : maximum breadth, about nine and a-half.
East end of Maud Island, opposite Leading Island: one small but
very perfect specimen.
This shell is possibly a mere variety of Lg/osoma Powelli, which
differs from the type of that species only in its much smaller size, less
regular contour and in the fact that its transverse striae and plications
cover the whole of the body whorl and are not obsolete on its basal
portion. Its greatest diameter is ten mm., while that of L. Powelli is
said to be twenty-eight mm. On the other hand the Maud Island
specimen almost certainly belongs to the genus Vanikoro of Quoy and
Gaimard, of which Narica, Recluz, is a synonym.
AMAUROPSIS TENUISTRIATA, Whiteaves.
Plate 28, fig. 3.
Amauropsis tenwlstriata, Whiteaves. -1876. This volume, p. 48. pl. 9, figs. 4
and 4a.
Shingle Bay, on Moresby Island, one specimen: Bay east of Alliford
Bay, nine specimens: South Island, five specimens. All these locali-
ties are in Skidegate Inlet. As the original figure of this species is
not very satisfactory an additional one has been given.
217
CALLIOSTOMA consrmerum. (N. Sp.)
Plate 28, figs. 4 and 4a.
Shell conical, trochiform, length and breadth about equal: whorls
four or four and a half, those of the spire obliquely compressed : suture
distinct, flattened at nearly a right angle to the sides of the whorls or
somewhat excavated: last whorl about two-thirds of the entire length,
(in adorsal view) concavely and shallowly constricted or grooved above
the midde, most prominent a little below the centre: axis imperforate.
Aperture rhombic-ovate, outer lip thin and simple; columella truncated
and ending in a prominent tooth-like process anteriorly: inner lip
expanded at its base and marked by a shallowly arcuate excavation
in front of the tooth-like process on the columella.
Surface marked by numerous and rather fine revolving ribs, which
when examined by a lens are seen to be crossed by minute and densely
crowded oblique striac.
Length or height, seventeen millimetres and a-half : maximum
breadth, seventeen mm. : height of body whorl, eleven mm.
East end of Maud Island, opposite Leading Island: one fine adult
specimen with the whole of the characters of the mouth well shown.
CINULIA PUSILLA. (N. Sp.)
Plate 28, figs. 5 and 5a.
Shell very small, subglobose or broadly subovate in outline, its length
and breadth being very nearly equal: spire obtuse, short, about one-
fourth of the entire length: volutions three, the first and second
obliquely convex, the last large, ventricose and inflated: outer lip
thickened and margined exteriorly by a rather broad flat band which is
narrowest posteriorly: aperture narrow, ovately subpyriform, rounded
in front and pointed behind: columellar lip covered with a callus:
columellar folds not clearly distinguishable.
Surface markings consisting of numerous spiral rows of minute shal-
low punctations, with broader and smooth flat spiral bands between
them. On the last volution and near the month, there are fifteen or
sixteen rows of spiral punctures, which latter are about one half as
bread as the smooth flat bands between them. Under an achromatic
microscope with an inch and a half objective, these spiral punctations
are seen to be transversely oval or somewhat rectangular in outline.
Dimensions of a supposed adult specimen: length, nearly five
millimetres: maximum breadth, four mm.: height of last whorl as
viewed dorsally, three millimetres and three-quarters.
218
South Island, in Skidegate Inlet: seven specimens, three of which
have the thickened outer lip preserved.
Tnocmermon CYLINDRACEUS, Stoliczka.
Plate 28, fig. 6.
Trochactaon cylindraceus, Stoliczka. -1868. Palaeontologia Indica. Cre-
taceous Fauna of Southern India,
Vol. II., p. 419, pl. 14, figs. 4,10-14,
as Actaeonella cylindracca.
Perhaps=Actazonclla oviformis, Gabb. -1869. Palaeontology of California.
Vol. II., p. 173, pl. 28, fig. 58.
Actaeonina. (Sp. undt.) -1876. This volume, page 53.
“ Trochact. testa ovate-elongate, cylindracea, antice et postice paulo
attenuata, spira plus minusve prominente, obtusiuscula ; anfractibus
angustis, postice oblique et anguste applanatis, deinde subcarinatis;
striis incrementi in superficie ultimi anfractus lente curvatis, apertura
longa, postice angustissima, antice latiore ac rotundata; labro ad
marginem acutiusculo, levigato, antice oblique late ac lentissime effuso ;
labio levissimo, postice paulo incrassato, antice triplicate : plica antica
tenuissima, postice crassissima.” Stoliczka.
East end of Maud Island, opposite Leading Island ; one small speci-
men. A number of crushed, distorted and badly preserved examples
of a shell which agree in most particulars with the above quoted
description of T. cylindraccus, though their columellar folds are very
indistinctly shewn, were collected by Mr. James Richardson in 1872, at
Skidegate Channel, west of Alliford Bay, probably from exactly the
same locality as Dr. Dawson’s specimen, which is certainly conspecific
with them. As indicated in the synonymy, it is most likely that the
Actoconella oviformis of Gabb is identical with T. cylindraceus.
LAMELLIBRANCHIATA.
Tnnnno SUCIENSIS, Whiteaves.
Plate 29, fig. 1.
Teredo Suciensis, Whiteaves. -1879. This volume, p. 135, pl. 17, figs. 1 and 1 a.
Burrows of a species of Teredo which cannot at present he distin-
guished from T. Suciensis, are abundant in pieces of fossil wood col-
219 I
lected by Dr. Dawson from rocks of this division on the North Shore
of Cumshewa Inlet. Only one specimen of the shell has been seen,
which consists of a cast of both valves with most of the test well pre-
served on the posterior half of each. As the sculpture of the anterior
auricle and that of the median area of the valves is not known, the
identification of this specimen with T. Suciensis is somewhat uncertain.
MARTESIA CARINIFERA, Whiteaves. .
Plate 29, figs. 2 and 2a.
Ma/rtesia carimlfera, Whiteaves -1876. This volume, p. 54, pl. 9, fig. 7.
Shores of Bear Skin Bay, in Skidegate Inlet: a fine specimen of a
colony of the burrows of this species in fossil wood, with several of the
shells in situ.
CORBULA eoncmna. (N. Sp.)
Plate 29, figs. 3 and 3a.
Shell very small, nearly equivalve, the right valve being a little
larger than the left, inequilateral, moderately convex, the thickness
through the closed valves being a little less than the greatest height:
outline transversly subovate, the length as compared with the breadth
being about as seven to five. Anterior end short and regularly rounded
at the margin in both valves: posterior end about one-third longer
than the anterior, narrowing equally towards its termination, which is
obliquely truncated and biangular in the left valve and whose upper
angle is rounded ofi in the right. Cardinal margin rounding abruptly
downwards in front, straighter and sloping very gently downwards
behind: ventral margin convex and evenly rounded anteriorly,
straighter and ascending very gradually posteriorly, most prominent
a little in advance of the mid-length. Beaks broad and not very pro-
minent, incurved, inclined slightly forwards and situated about half-
way between the centre of each valve and the farthest extremity of the
anterior end. On the left valve a distinct umbonal ridge extends from
the beaks to the posterior end of the base, and behind and above this
ridge the valve is inflected at an obtuse angle. On the right valve the
corresponding umbonal ridge is almost obsolete and the posterior area
ill-defined.
Surface marked with fine, crowded, and rather irregularly disposed
concentric ribs.
Length, seven millimetres ; greatest height, five mm. ; thickness
through the closed valves, four mm.
South side of Alliford Bay, Skidegate Inlet, very abundant and in
good condition; Bear Skin Bay, one specimen.
220
Of the six species of Corbala described by Mr. Gabb from the
Californian Cretaceous, this little shell comes nearest to C’. parilis,* but
it is much more diminutive in size, more inequilateral, and shows no
traces of radiating striae between the concentric ribs.
PERIPLOMA cusmnaruu. (N. Sp.)
Plate 29, figs. 4, 4a and 4b.
Shell compressed but perhaps abnormally flattened; apparently
thin and lenticular, nearl'y equivalve, but very inequilateral: anterior
end subcircular in some specimens, more narrowly rounded in others,
usually gibbous and somewhat produced at or near the termination
of the base in front; posterior end shorter than the anterior, abruptly
cuspidate, either rounding more or less regularly upwards and outwards
from below, and forming an angular or subangular junction with the
hinge line above, or contracting suddenly and concavely above into a
short, narrow and upturned beak, of which the hinge line forms the
upper boundary. Ventral margin broadly rounded, but sometimes
gibbous or subangular in front: superior border convexly arched
in front and concave behind. Beaks broad, low, depressed, recurved
and placed considerably behind the middle. Posteriorly the beaks
are bounded by a single, short, oblique and narrowly linear groove,
which indicates the probable existence of a corresponding thin and
laminar rib on the inner surface of the posterior umbonal slope in
each valve.
Surface apparently smooth or marked only by a few faint concentric
striations. '
Length in the middle of the valves, twenty millimetres : maximum
height twenty-four mm. and a-half.
North side of Maud Island: two specimens with both valves flattened
out and a single right valve.
This shell is evidently congeneric with the Periploma suborbiculatum
described on page 138 of the present volume from a single specimen
collected by Mr. James Richardson in 1872 from the Upper Cretaceous
rocks of the Nanaimo River, V. I. It may be only a variety of that
species, but appears to differ therefrom in its narrowly and shortly
beaked posterior extremity, less central beaks and in having only one
laminar ridge on the interior of each valve. 6
The lateral outline of the valves of some specimens of this species
is singularly like that of the Meelaia sclla of Gabb,]L but the present

* Palaeontology of California. Vol. I., p. 150. pl. 29, figs. 239 and 23%.
’r Palaeontology of California. Vol. 1, p. 191, pl. 25, fig. 179.
221
shell clearly belongs to the Anatinidw, while Meekia is supposed to be
allied to Trigonia or Tancredia.
THRACIA SEMIPLANATA. ‘ (N. Sp.)
Plate 29, figs. 5, 5a, 5b and 50-
Thracia, Sp. Undt.-This volume, page 57.
Shell transversely elongated, compressed, inequivalve, the right
valve being moderately convex and the left almost fiat ; nearly equi-
lateral : anterior end subangular or obtusely pointed below the middle
in some specimens, but rounded in others: posterior end about equal
in length to the anterior but squared and truncated or subtruncatedl
almost at a right angle to the ventral margin. Superior border very
oblique anteriorly, sloping convexly and rapidly downwards and
meeting the upward curve of the basal margin at an obtuse angle;
behind the beaks the superior border descends also obliquely, but not
quite so rapidly, and_ in some specimens very gently and in a straight
line or shallowly concave curve, to its junction with the posterior
margin: basal margin nearly straight in the centre. Umbones broad,
prominent, and nearly central, beaks slightly depressed, curved
strongly inwards and backwards. In well preserved specimens the
posterior area is bounded by a sharp, but not very prominent ridge or
keel, Which extends from the beaks to the posterior end of the base,
and behind and above which the valves are obliquely inflected. On
the hinge line also, behind the beaks, there is a long and narrow,
linear-lanceolate and shallowly excavated ligamental area.
Sculpture somewhat variable; in some specimens the surface is
very finely striated, in others the concentric striations are coarser and
consist of closely disposed raised lines which are most densely crowded
on the posterior area.
Length of a large specimen, fifty-six millimetres; height, thirty-
eight mm. ; thickness through the closed valves, twenty mm.
Abundant and in a fiue state of preservation on the South side of
Alliford Bay; Bear Skin Bay, Skidegate Inlet, two specimens;
South Island, one specimen.
The above description is intended to express the characters presen-
ted by normal and undistorted specimens. In this condition even the
species is very variable in form as well as in sculpture. Thus, in some
specimens the shell is more or less pointed, though obtusely so, below
the middle or near the base anteriorly, in others the anterior margin
is rounded. The upper or cardinal margin of the posterior end is
222
nearly as oblique as that of the anterior end in some specimens, and
almost horizontal in others, and again the truncated margin of the
posterior end may be either straight or slightly convex.
When distorted, as the specimens frequently are, and in almost
every conceivable way, the range of variation in form is, of course,
still greater. Some individuals are so much elongated transversely
and so narrow in the direction of their height that Pictet’s figures
of the T/zracia Sanctcc-Crucis, from the Upper Gault of Switzerland
would represent them very accurately, though the normal form, as
stated on page 56 of the present volume, is much more like that of
the Thracia (or Oorimya) Nicoleti, of Agassiz, from the Swiss Lower
Neocomian.
This species and Caryatis subtrigona are by far the most abundant of
the lamellibranchiate bivalves collected by Dr. G. M. Dawson.
PLEUBOMYA SUBCOMPRESSA, Meek.
(Typical form.)
Plate 29, fig. 6.
Myacites (Plearomya) subcompressa, Meek.—1873. Annual Report of the United
States Geological Survey of the
_ Territories for 1872, p. 472.
“ “ “ “ -1877. United States Geological Sur-
vey of the 40th parallel, Vol. IV.,
p. 136., pl. 12. figs 6 and 6a.
? = Plcuromya papyracca, Gabb. ——1869. Palaeontology of California,
Vol. II. p. 178, pl. 29, ffg. 66.
Beaks prominent and erect : surface marked by concentric plications
“ that become nearly obsolete on the posterior dorsal region and near
the front.”
South side of Alliford Bay: a perfect and well preserved cast of
the interior of the right valve. -
The specimen agrees well with Mr. Meek’s description and figure of
the type of Myacites subcompressus and with Mr. Gabb’s diagnosis and
figure of Pieuromya pap;/racea, or more properly still of Panopea papy-
racea, as the broad and deep sinus in Mr. Gabb’s type shows that it is
congeneric with the Cretaceous Panopaeas.
Q
223
PLEUROMYA SUBGOMPRESSA, V£t1°. OARLOTTENSIS.
Plate 29, figs. 7 and 7a.
Plcuromya Carlottensts, Whiteaves. -1876, This volume,p. 57, pl. 9, fig. 8.
, Myacttes subcompressus. White, (As of Meek.)-1880, United States Geological
Survey. Contributions to Palae-
ontology, Nos. 2-8, pl. 38, fig. 5c;
caet. excl.
Comp. Pleuromya Newtont, Whitfield. -187 7. Preliminary Report on the
Black Hills, p. 20.
“ “ “ -1880, United States Geographical
and Geological Survey of the
Rocky Mountain Region, Geology
of the Black Hills of Dakota, p
367, pl. 5, figs. 19 and 20.
Umbones broad and depressed: beaks (or apices of the umbones)
curved inwards, downwards and inclined a little forwards: shape, with
this exception, and sculpture as in the type of P. subcompressa.
South side of Alliford Bay, five casts of the interior: East end of
Maud Island, one specimen. On the mainland of British Columbia it
occurs also in the porphyrites and felsites of Sigutlat Lake and the
Iltasyouco River, where it was collected by Dr. G. M. Dawson in 1876.
The specimen from which the description of P. Carlottensis was
made is a distorted and imperfect cast, and the figure of it on Plate 9
of the present volume is by no means satisfactory. Although most of
the Canadian specimens collected since are also either distorted or
imperfect, they show that the shell is very variable in shape, and that
it is usually more elongated transversely than the original figure of it
might lead one to suppose. The anterior end, which is very short, is
excavated under the beaks and abruptly truncated below in the best
preserved examples : the posterior end is elongated and either narrowly
rounded or somewhat pointed at its junction with the ventral margin.
Some individuals of P, Carlottensis appear to be intermediate in their
character between P. Newtoni, Whitfield, and P. subcompressa, Meek,
their shape being like that of the former species, and their sculpture
like that of the latter. Judging by the figure on Plate 38 of Dr. C. A.
White’s “ Contributions to Palaeontology,” other specimens appear to be
conspecific with the fossil from Devils’ Slide, Cinnabar Mountain,
Montana, which Dr. White says “may prove to be a dtferent species,”
but which he regards provisionally as “ only a variety of Myacites
subcompressus.” In the writers’ judgment, P. Carlottensis also is doubt-
fully distinct from P. papyracea, Gabb.
March 27th, 1884. 3
224
Pnnnnonn. (SUBCOMPRESSA? van.) LEVIGATA.
Plate 30, figs. 1, 1a., 1b, and 1c.
Myacites subcompressus, White. —-1880. United States Geological Sur-
vey, Contributions to Palaeontology,
Nos. 2-8, p. 151, pl. 38, figs. 5b and _
50 : coet. excl.
Shell compressed, most convex near the anterior margin and some-
what wedge-shaped as seen from above. Valves closed in front,
slightly gaping behind, transveresly elongated, the length being twice
the height in some specimens and less than twice in others, very inequi-
lateral ': anterior end short and truncated or sub-truncated at almost a
right angle to the ventral margin: posterior end much longer and
either rounded or sub-truncated somewhat obliquely at its extremity.
Cardinal margin short, excavated and sloping suddenly downwards in
front: straighter and descending much more gradually behind: ventral
margin nearly straight. Umbones large, broad and prominent: beaks
small, curved inwards, downwards and a little forwards, and either
anterior and nearly but not quite terminal or placed about half way
between the centre of the superior border and its anterior termination.
Anterior umbonal ridge obtusely angular and extending from the beaks
to the anterior end of the basal margin: in front of this ridge or pro-
minence the valves are bent obliquely and abruptly inwards, and
immediately behind it there is a broad and faint shallow depression:
posterior umbonal ridge well defined above, but becoming gradually
obsolete below.‘
Surface marked with fine and rather crowded concentric striations.
Hinge teeth and muscular impressions unknown.
In two specimens the maximum height is twenty millimetres and
the thickness twelve, but the length of the one is forty mm., while that
of the other is only thirty-three.
South side of Alliford Bay, nine casts of both valves: East end of
Maud Island, three similar casts. This form occurs also in the felsites
of the Iltasyonco River, B.C., where it was collected by Dr. G. M. Dawson
in 1876. The specimens from this latter locality were doubtfully and as
it would now seem erroneously identified with the Pleuromya subeZlz'p-
tica of Meek and Hayden in the Report of Progress of the Geological
Survey of Canada for 1876-77.
The shells described above appear to be precisely similar to two
Montana specimens which are figured by Dr. C. A. White as varieties
of Myacites subcompressus, Meek, although on the other-hand it is diffi-
cult to see how they can be distinguished from some of the Gault
225
varieties of the Panopea Neocomiensis of d’Orbigny, as represented in
the “ Paléontologie Frangaise ” or the “ Paléontologie Suisse.”
GONIOMYA. (Species undeterminable.)
South side of Alliford Bay, a very small but well preserved cast,
which measures nine millimetres in length by about six or seven in
height. A similar specimen has been collected in the Upper 'Neoco-
mian rocks of the valley of the Fraser River.
TELLINA SKIDEGATENSIS. (N. Sp.)
Plate 30, figs. 2, 2a, and 21).
Shell thin, compressed, transversely elongated, the length being
about one-third greater than the height: lateral outline varying in
different specimens from ovately and broadly subtriangular to trans-
versely subelliptical. Anterior end somewhat pointed or narrowly
rounded: posterior end always a little longer than the anterior, sub-
truncated and narrowing gradually both above and below, or rounded
below and obtusely subangular above. Superior border sloping con-
cavely and rather rapidly downwards in front of the beaks, straighter
and descending more gradually behind : ventral margin broadly
rounded. Beaks moderately prominent, curved inwards and forwards
and placed a little in advance of the middle.
Surface closely and concentrically costulate.
Pallial sinus very obscurely indicated, but apparently broad and
rather deep.
Length of a left valve with the test preserved, twenty-six milli-
metres: maximum height of the same, seventeen mm. In a larger
cast the length is forty-one millimetres and the greatest height
twenty-six.
Bear Skin Bay, Skidegate Inlet: four or five specimens.
This shell probably does not belong to the typical section of the
genus Tellina, as exemplified by the recent T. radiata of Linnaeus and
two or three others, but to the subgenus Tellinella or Peronaeoderma.
It approaches the Tellinella petrosa of Stoliczka,* from the Cretaceous
rocks of S. India, in many of its characters, especially in its surface
ornamentation, but it is much less pointed at each extremity.
Two casts of single valves of a small Tellma which may possibly be

* Pal. Indica. Cret. Faun. S. India. Vol. 3, p. 125, pl. 16, figs. 27-28.
226
identical with the present species, the most perfect of which is repre-
sented by figure 3 of plate 30, were collected on the north side of
Maud Island. The specimens from this locality, which do not shew
any trace of the two surface markings, are smaller, less elongated
transversely in proportion to their height, and more nearly equilateral
than the types of T. Skidegatensis. ~
CARYATIS SUBTRIGONA, Whiteaves.
Callista (.9) subtrigona, Whiteaves. —1876- This volume, p. 63, pl. 9, fig. 10.
I/ucina. Sp. Undt. “ - “ “ “ p. 61, fig-6,a11dP1-
9, fig. 12.
u u u __ “ “ “ p. 62, fig.
Bear Skin Bay, Skidegate Inlet, extremely abundant: South side of
Alliford Bay, apparently not quite so common.
The large series of specimens collected by Dr. Dawson prove conclu-
sively that the fossils doubtfully described on pages 61 and 62 of the
present volume as species of Lucina are really only distorted and
imperfect examples of Oaryatis subtrigona.
THETIS AFFINIS. (N om. prov.)
Plate 30, figs. 4, 4a and 4b.
Probably a variety of Thetis major, Sowerby.
Compare Thetis major, Sowerby. -1829. Mineral Conchology, Vol.
VI., p. 20, pl. 513, figs. 1 to 4.
Shell rather large (for the genus), moderately convex, the thickness
through the closed valves being about one-third less than the maximum
height ; outline variable; in some specimens the lateral contour is
transversely ovate-orbicular, the ventral margin being more broadly
rounded than the anterior end, and the posterior end narrower and
a little longer than the anterior; in others, which are very inequi-
lateral, the valves are ovately subtrigonal as viewed laterally, the
short anterior end being subangular at its junction with the superior
border above, and the produced posterior end obtusely pointed below
the middle. Umbones large and prominent: beaks curved inwards,
downwards, and a little forwards, subcentral in some specimens and
placed very near the anterior end in others.
Surface marked with rather irregularly disposed concentric lines of
growth, and by a few very faint radiating striee.
Hinge teeth unknown. Muscular impressions transversely elongated
Q
227
and ovate-lanceolate in outline : pallial border sti ongly twice inflected:
pallial sinus proper very deep, narrow, acutely pointed, extending far
into the umbonal cavity, and reaching as far backwards as to within one
or two mm. from the tips of the beaks; anterior pallial inflection also
very deep, but broader and not extending quite so far backwards as the
inner termination of the true pallial sinus.
Dimensions of a specimen which is ovately-orbicular in outline:
length, forty-two millimetres, height, thirty-seven and a-half mm.:
maximum thickness twenty-three. In an ovately subtrigonal cast of
this species the maximum length and height are each fifty mm., and
the thickness through the closed valves is thirty-five.
Bear Skin Bay, Skidegate Inlet: eleven specimens.
The very deep double inflection of the pallial border appears to be
the only point wherein this shell differs from the Thetis major of
Sowerby. In other respects the present species seem to be intermediate
between the T. minor and the T. major. Some paleontologists, such as
F. Reemer, E. Forbes, and Mons. Ebray, regard all the nominal spe-
cies of Thetis as varieties of one, which Raemer proposes to call T.
Sowerbzt, and if this view be adopted, the Thetis above described will
of course rank only as one of the forms of T. Sowerbii.
OYPRINA OCCIDENTALIS’. (N. Sp.)


I I I
\\
/,.él.-r- §.\
/4,
\\\ I 7
\\\ \ Ii
\
\
\
\
\
\
\
Fig. 10. Cg/prina occtdentalts. Outline of a cast of a left valve.
228
Shell (or rather cast) compressed, the maximum thickness being a
little more than half the height; outline transversely subovate : anterior
end short and rather narrowly rounded; posterior end longer and sub-
truncated below the middle; superior border descending abruptly and
concavely in front of the beaks, sloping gradually and somewhat con-
vexly downwards behind; umbones broad and rather prominent, beaks
slightly depressed, appressed and directed forwards. Surface marking,
hinge teeth and muscular impressions unknown.
Dimensions: length, ninety-four millimetres ; height seventy-five
mm.; maximum thickness, forty-three.
South side of Alliford Bay: a single imperfect cast.
The specimen is supposed to belong to the genus Cyprina on account
of its strong resemblance to the C. ovata of Meek and Hayden, of which
latter species large numbers of fine examples, with the test preserved,
have recently been collected by Dr. G. M. Dawson, R. G. McConnell
and T. C. Weston at the St. Mary’s, Belly and South Saskatchewan
rivers. The C. occidentalis may be only a variety of O. ovata, but it
appears to be more transversely elongated, more truncated postcriorly
and more gibbous in the umbonal region. The two shells also occur at
very difierent horizons in the Cretaceous formation.
Paorocannruu HILLANUM, Sowerby. (Sp.)
Plate 30, fig. 5.
Car-diam Hillcm/u/m, Sowerby- -1813. Mineral Conehology, Vol. 1, p. 41, pl. 14,
fig. 1.
“ “ “ -1843. Paléontologie Francaise Terrains Creta-
cés, Vol. 3, p. 27, pl. 243.
Protocardium Htllanam, Stoliczka. --1871. Palaeontologia Indica, Cretaceous
Fauna of Southern India, Vol. 3, p. 219,
pl. 12. figs. 8-10, and pl. 13, figs. 1-3.
East end of Maud Island, one perfect right valve, with the test pre-
served, which, however, measures only nine millimetres and ahalf in its
greatest length, and nine in its maximum height. Five small but well
preserved casts of a small Protocardiam from the S. side of Alliford Bay
are also believed to belong to this species, though as the specimens from
both localities are all very small their specific identification is not alto-
gether free from doubt.
229
ASTARTE PAEKARDI, White.
Plate 30, figs. 6, 6a and 6b.
Astarte Packardt, White. -1880. United States Geological Survey, Contri-
butions to Paleontology, Nos. 2-8, p. 149, pl. 37,
figs. 6a and b.
“ Shell subcircular in marginal outline, moderately and almost regu-
larly convex: its length and full height almost equal, or the latter a
trifle less than the former ; margin forming a continuous subelliptic curve
all the way around from the posterior end of the hinge to the lower
end of the lunule ; hinge margin short and gently convex; beaks
placed subcentrally, rather small but prominent, and turned forward;
lunule moderately large, rather deeply impressed and clearly defined,
its abruptly inflected borders giving a concave appearance to that por-
tion of the shell as seen by lateral view. Surface marked by somewhat
numerous and regular concentric undulations, and between these, by
minute striae of growth. Hinge unknowri.
Transverse length, twenty millimetres; height from base to beaks
nearly one millimetre less.” White.
East side of Alliford Bay: four large and beautifully preserved spe-
cimens with the test, and a few fragments: South side of Alliford Bay,
abundant in the condition of small but perfect casts: East end of Maud
Island, five small examples with the test preserved.
The specimens from the above mentioned localities, which the writer
has no doubt are correctly identified with A. Packardi, give the follow-
ing additional information about its specific characters. At Maud Island
the shell attains to the size of thirty millimetres in length by as many
in height. The hinge dentition consists of two transverse cardinal teeth
in each valve, and there are no laterals. In the right valve both teeth
are most prominent in the middle, but the anterior cardinal tooth is
triangular in outline and comparatively large. The inner margin of the
valves below and at the side is simple in some specimens and distinctly
crenulated in others, as in the recent A. sulcata of da Costa.
Dr. White says “ This shell is probably not a true Aslarte as that genus
is recognized among living forms, but it probably belongs to a section to
to which Gabb gave the name Erzjohyla.* The type of Sowerby’s genus,
however, is his A. lurida of the Inferior Oolite, whose characters are
very near to those of A. Packardi.
The three or four imperfect and badly preserved casts from the fel-
sites of the Iltasyouco River, B.C., which were provisionally identified

* Op. cit., p. 149.
4'
230
with the A. ventricosa of Meek on page 155 of the Report of Progress
of the Geological Survey of Canada for 1876-77, most probably also
belong to the present species.
Umo HUBBARDI, Gabb.
Unto Habbardi, Gabb. -1869. Paleontology of California, Vol. 2, p. 190, pl. 30,
fig. 85.
. “ “ Whiteaves.-1876. This volume, p. 65, pl. 9, fig. 13.
Hooper’s Creek or King’s Tunnel, Cowgitz’ coal mine: very abundant.
It was collected at the same locality by Mr. Richardson in 1872.
As pointed out on pages 66-67 of the present volume. the hinge den-
tition shows that the species is a true Unto and not a Margaritana nor an
Anodon.
TRIGONIA DIVERSICOSTATA, Whiteaves.
Trigonia diversicostata, Whiteaves. -1876. This volume, p. 68, pl. 10, fig. 1.
Bear Skin Bay, Skidegate Inlet: three specimens.
Tnreonm Mannnnsm. (N. Sp.)
Plate 31, fig. 2.
Shell moderately convex, longer than hi gh,very inequilateral: anterior
end short and rounded : posterior end produced into a rather long and
pointed beak, which narrows gradually both above and below, and
whose lower margin is somewhat convex and upper margin shallowly
concave. Umbones narrow but very prominent, placed about half way
between the centre and the farthest extremity of the anterior end;
beaks, small, curved inwards and downwards: posterior area well
defined and bounded by a rather prominent earina, which is acutely
~ angular near the beaks and obtusely angular behind the middle of the
valves.
The front and central portions of the sides of the valves are marked
by simple concentric ribs, but at the pointed extremity of the posterior
third of the sides these concentric ribs are crossed by a few radiating
costae, which commence at or a short distance below the outer boun-
dary of the posterior area and extend to the ventral margin. In the
most perfect specimen, which was collected at Maud Island, there are five
radiating ribs on the posterior extremity, two of which, the ones nearest
to the anterior end, are comparatively broad, while the three behind
them are very narrow and inconspicuous. In two moulds of the exte-
rior of a small Trigonia from Cumshewa Inlet, however, which probably
231
belongs to this species, there are indications of four or five very coarse
radiating ribs on the posterior extremity of the sides, all of which are
of equal breadth. Posterior area marked by very oblique raised striae.
Length, thirty-four millimetres: maximum height, from the centre
of the umbo to the ventral margin, twenty-four mm.
North side of Maud Island, a perfect but not very well preserved
right valve. South Island, one specimen: north side of Cumshewa
Inlet: two imperfect moulds of the exterior and one cast of the interior.
This shell may be an extreme variety of the preceding species, from
which it differs chiefly in the peculiar ornamentation of its outer sur-
face. It appears to be nearly related to the Trigonia sulcataria of
Lamarck,>i< from the “ Craie Chloritée ” or “Upper Greensand ” of
France.
Tnreonra Dawsom, Whiteaves.
Plate 31, figs. 1 and 1a.
Trigom'a Dawsoni, Whiteaves. -1878. Geological Survey of Canada, Report
of Progress for 1876-77, p. 154.
“ Shell gently convex, compressed ; outline ovately-subtrigonal ;
anterior end very short, broadly rounded,‘ as is also the ventral margin:
beaks elevated, recurved, anterior, subterminal: hinge line sloping
concavely downwards behind the beaks : extremity of the somewhat
elongated posterior end truncated rather obliquely. Surface of the
main body of the shell marked by about twelve curved, nodulous costee,
all of which commence at the margin of the posterior area. The five
nearest the beaks curve downwards and terminate at the anterior end.
The middle ones, though curved, are nearly transverse, and end at the
centre of the ventral margin, while the last three incline decidedly
backwards. The posterior area is marked either by crowded, transverse,
regularly arranged and continuous raised striee, or by coarse, irregular
and broken up or angularly bent, short, tranverse folds. Iltasyouco
River and Sigutlat Lake, frequent and well preserved.” The above is
the original description of the species as it occurs in the volcanic por-
phyrites of the localities mentioned, on the main land of British
Columbia.
South side of Alliford Bay: one fine specimen with the test well
preserved on both valves, but with a small piece broken off the pos-
terior end.
The specimen from the Queen Charlotte Islands differs from the types
of T. Dawsoni in the following particulars, though these differences

fi *S5e_q)D’Orbigny. Paléontologie Frangzaise, Terrains Crétacés. Vol.13, p. 150, iatlas, pl. 294,
gs. .
232
are obviously not of specific importance. In the Alliford Bay shell
the number of curved nodulous ribs on the sides of the valves is at
least eighteen: its posterior area, in addition to the transverse lines
which cover its surface, is marked by three equidistant, curved, longi-
tudinal rows of nodules or nodulous ridges, in each valve, which extend
from the beaks to the posterior margin. The lower row of nodules
which bounds the posterior area externally, is prominent and com-
posed of comparatively large nodules, but the two upper nodulous
ridges are not so prominent and are composed of much smaller nodules.
It is not improbable that T. Dawsoml may be only a variety of the T.
Montanaensis of Meek)‘< but for the present it is thought prudent not to
unite the two forms under one name, for the following reasons. In T.
Montanaensis the front margin of the valves is said to be ornamented by
a transverse row of nodules which latter are “ larger than the others and
are ranged in a vertical row of strong nodules, which form a conspicu-
ous feature of the shell,”t and its posterior area is described as “marked
only by numerous, distinct, nearly vertical lines of growth.”1 There
is no such vertical row of large nodules on or near the anterior margin
of any of the specimens of T. Dawsoni, and on the posterior area of
the Queen Charlotte Island variety of that species the transverse raised
lines, as already stated, are crossed by three nodulous ridges or longi-
tudinal rows of isolated nodules.
NUCULA (ACILA) TRUNGATA, Gabb.
Nucula truncate, Gabb. -1864. Palaeontology of California, Vol. I, p. 198, pl. 26.
figs. 184 and 184 a, b.
Bear Skin Bay and Bay east of Alliford Bay, in Skidegate Inlet:
one characteristic specimen from each of these localities.
N UGULA SOLITARIA, Gabb.
Plate 31, figs. 3 and 3a.
Nucula solitaria, Gabb. -1869. Palaeontology of California, Vol. 2, p. 197, pl.
32, fig. 94.
South side of Alliford Ray: nine good casts of both valves with por-

’* See Dr. C. A. White’s Contributions to Palaeontology, Nos. 2-8. Washington. I880. P. 147,
pl. 38, fig. 2a.
1’ I b., page 146.
I I b.’ page 146.
233
tions of the shell preserved. The specimens, one of which is repre-
sented on Plate 31, agree well with Mr. Gabb’s description of N.
solitaria, and are almost exactly of the same dimensions as his type.
YOLDIA ARATA. (N. Sp.)
Plate 31, figs. 4 and 4a.
Y oldia. (Sp.undt.) This volume, page 72.
Shell small, tumid, transversely elongated and very inequilateral:
anterior end narrowly rounded or somewhat pointed in the middle:
posterior end about one-third longer than the anterior, attenuated and
produced into a straight and narrow or slightly curved and somewhat
broad beak. In some specimens the beaked posterior extremity nar-
rows gradually and almost equally both above and below, and its ex-
treme apex is truncated: in others the margin of the posterior end
rounds up obliquely from below and forms a subangular or pointed
junction with the shallowly concave or straight downward slope of the
hinge border above. Umbones small, narrow, projecting very little
above the hinge line and placed in advance of the middle: beaks
minute, curved inwards and a little downwards, with a slight inclina-
tion towards the posterior end. Posterior area linear-lanceolate in out-
line, as viewed from above, consisting of an abrupt and obtusely angu-
lar inflection of each valve behind the beaks.
Surface marked with minute grooves and raised ridges which are
very irregular in their disposition, but which as a whole are very
nearly concentric. Sometimes the ridges are not continuous, and they
are rarely either quite parallel with each other or with the ventral
margin. In some specimens, also, the grooves are comparatively
broad and separated by exceedingly narrow raised lines: in others the
grooves and subangular ridges which alternate with them are equal in
breadth.
Dimensions of an average specimen: length, ten millimetres: height,
six mm. and ahalf: thickness through the closed valves a little over
four mm.
South Island, Skidegate Inlet, abundant: Bear Skin Bay, Skidegate
Inlet, three specimens: Cumshewa Inlet (“ horizon doubtful,” G. M. D.),
four specimens.
234
N EMODON FIscHERI, d’Orbigny. (Sp)
Plate 31, fig. 5.
Area Fischeri, d’Orbigny. —1850. Paléont. stratigr. 1, p. 369, Paris.
Arca concinna,d’Orbigny. ——(as oi Von Buch.) 1845. Géologie de la
Russie d’Europe et des Montagnes de
1’Oura1, V01. 2, p. 462, pl. 39, figs. 17-18. ‘
Gueullæa Fisclzeri, d’Orbigny (Sp.) —Eichwald. 1867. Lethaea Rossica, V01.
2, p. 559.
Area concinnata, Graf. Keyserling. ——Petschorareise, p. 306.
“ Area testa elongatä, inflata, radiatim striatâ: latere buccali, brevi,
angustato; latere anali elongato lato, obliquè sinuato; area ligamenti
angustatâ.
Coquille très allongée, assez renflée, marquee partout de stries
rayonnantes avec lesquelles se croisent quelques lignes Œaccroissement
concentriques. Côté buccal très court, anguleux du côté de l’area
cardinale côté anal très long, élargi, coupé obliquement et échancré à.
son extrémité. Facette du ligament très longue, étroite, très finement
sillonnée. Dimensions. Longeur 37 millimetres. Par rapport à. la
longueur: largeur, 0'40; épaisseur, 0'35; longueur du côté anal, 0'7 5.”
d’Orbigny, Greol. de la Rues, &c., Vol. 2, p. 462.
“La figure donnée par M. d’Orbigny montre le bord inférieur
légèrement échancré, et Pextrémité postérieure de la coquille pourvue
d’une légère carène médiane oblique, située entre la carène obtuse
extérieure oblique et le bord cardinal du test; la description de M.
d’Orbigny ne fait pas mention de ce caractère.” Eichwald, Lethaea
Rossica, Vol. 2, p. 559-60. “Hab. dans le grès néocomien noirâtre de
Khoroschowo ” (near Moscow) “et dans le grès blanc compacte à. grains
de glauconite près d’Orenbourg au mont Isaragoul.” Ib., p. 559. At
each of these places it is found associated with Aucella Mosquensis, Which
latter shell occurs also at the Queen Charlotte Islands.
Abundant in fine condition at the east end of Maud Island. The
hinge dentition sheWs that it belongs to Conrad’s genus or subgenus
Nemodon.
235
GRAMMATODON INORNATUS, Meek and Hayden.
Plate 31, figs. 8, 8a, and 81).
Area (Cucullwa) inornata, Meek and Hayden. ——1858- Proceedings of the Aca-
' demy of Natural Sciences of
Philadelphia, p. 51.
Grammatodon tnornatus, Meek and Hayden -—1862. Idem, p. 419.
‘f “ “ “ “ —1864. Palaeontology of the Up-
per Missouri, p. 90, pl. 3, figs.
9, 9a and 9b-
“ “ Whitfield. ——-1880. Geology of the Black
Hills of Dakota, p. 359, pl. 5,
figs. 16-18.
North shore of Cumshewa Inlet, one nearly perfect specimen with
the valves widely open and partly clasping a valve of Imceramus con-
centricus.
Skidegate Inlet, south side of Alliford Bay, four specimens : and Bay
east of Alliford Bay, one imperfect example.
CUOULLZEA (IDONEABCA). Species undeterminable.
Gwculloea (?). Sp. Undt. This volume, page 73.
East end of Maud Island: a crushed and imperfect specimen which,
however, has the sculpture well preserved on both valves.
The surface markings consist of very numerous and densely crowded
concentric raised lines, which are crossed by radiating striae. On the
posterior and central portions of the sides of the valves the radiating
striec are close together and not much elevated, but near the anterior
margin they are distant, prominent and very acute.
TRIGONOARCA TUMIDA. (N. Sp.)
Plate 31, fig. 6.
Shell inflated, tumid, the thickness through the closed valves being
apparently a little greater than their maximum height: valves trans-
versely elongated and very inequilateral: anterior end short, rounding
up broadly and obliquely from below and forming a sharply angular
junction with the superior border above. Superior border nearly
straight both in front and behind, but sloping very gently downwards
236
I
in front: ventral margin also nearly straight behind the middle, but
obliquely as well as rather abruptly rounded upwards in front.
Umbones gibbous and very prominent, placed a little in advance of
the middle: beaks distant, curved strongly inwards and downwards,
with a slight inclination towards the anterior end: ligamental area
deeply and angularly excavated, narrowly subrhomboidal in outline as
viewed from above: posterior area obliquely flattened, margined by an
obtuse and not very well defined keel. Surface marked with crowded
and rather irregularly disposed concentric striations, which are
crossed, except upon the posterior area, with numerous radiating raised
lines. These latter are most prominent and distinct on the anterior
third of the shell. The ligamental area, also, is closely and concen-
trically striated.
Hinge teeth and muscular impressions unknown.
Dimensions of the only specimen collected: length, eighty-seven
millimetres; height, fifty-six mm.; approximate thickness through
the closed valves, sixty-four mm.
East end of Maud Island : a perfect and well preserved right valve.
The specimen evidently belongs to a new and interesting species of
Trigonoarca, which can be easily distinguished from the type of
Gonrad’s genus of that name, the Area Ligeriensis of d’Orbigny, (*)
by its very prominent umbones and distinct and numerous radiating
raised lines.
MYTILUS LANCEOLATUS, J. Sowerby.
Plate 31, figs. 7 and 7a.
Mytilus lameolatus, J. Sowerby. -1823. Mineral Conchology, Vol. 5, p. 55, pl.
439, fig. 2.
Mytilus edentulus, “ —1823. Mineral Conchology, Vol. 5, p. 55, pl.
439, fig. 1.
Myttlus tridens, “ -1836. In Fitton’s paper in the Translations
of the Geological Society of London, Vol.
4, Second Series, p. 342, pl. 17, fig. 14.
Mytilus praelongus, “ ——-1836. I b., p. 342, pl. 17, fig. 15.
Mytilus Zcmceolatus, d’Orbigny. -1844. Paléontologie Frangaise,Terrains Cré-
tacés, Vol. 3, p. 270, atlas, pl. 338, fig. 6.
Mytilus lanceolatus, Pictet. -1864-67. Paléontologie Suisse, Terrain Gré-
tacé de Ste. Croix, Vol. 3, p. 485, in which
a full synonymy of the species may be
found.
Shell obliquely compressed above, strongly carinated below the
middle, especially in front, and excavated at the base, in such a manner

* Paléontologie Frangaise. Terrains Crétacés. Vol. 3, p- 227, pl. 317.
237
that the outline of a transverse section through the centre of the valves
would be subtriangular, the two upper sides being somewhat convex
and the base shallowly concave: maximum thickness, as measured
from keel to keel, a little greater than the height. Lateral outline
narrowly mytiloid, valves slightly curved and much elongated trans-
versely: anterior end acutely pointed :i posterior obtuse : superior
border broadly arched but not very prominent: basal margin shallowly
concave : beaks anterior, terminal and approximated. Surface appar-
ently marked by coarse concentric striae of growth, with finer striae
intercalated between them.
Length of the only specimen collected, fifty-six millimetres : height,
as measured from the lateral keel to the centre of the hinge line,
eighteen mm. : greatest thickness, from keel to keel, twenty-two mm.
Shingle Ray, Skidegate Inlet: a cast of both valves with a very"
small piece of the test preserved. -
The above is a purely original description of the specimen collected
by Di). Dawson, from which it may be seen that its characters do not
seem to differ in any essential particular from those of the M. Zanceo-
Zatus of Sowerby as described by d’Orbigny, Pictet and other palaeon-
tologists.
MODIOLA SUBIMBRICATA, Meek.
Modiola (Volsella) subimbricata, Meek. --1873. Annual Report of the United
States Geological Survey of the
Territories for 1872, p. 47 2.
“ (SP- lllldt-) -—This volume p. 73.
Volsella subimbricata, White. --1880. United States Geological Sur-
vey. Contributions to Palaeonto-
logy, Nos. 2-8, p. 145, pl. 37, figs.
2a b, &c.
East end of Maud Island: three distorted specimens, two of which,
however, have the test preserved on both valves.
LITHODOMUS MAUDENSIS. (N. Sp.)
Plate 32, figs. 6 and 6a.
Shell convex, the maximum thickness through the closed valves being
about equal to their greatest height, most prominent laterally, in the
direction of a curved line which might be drawn from the under side
of the beaks to the posterior end of the base, beneath and in front of
238
which slight prominence the valves are abruptly and obliquely com-
pressed as well as somewhat excavated. Length nearly twice as great
as the height: lateral outline subelliptical: anterior end truncated
inwardly and obliquely under the beaks : posterior end narrowly
rounded: superior border regularly, convexly and very broadly arched:
ventral margin nearly straight or slightly concave in advance of the
middle and as slightly convex behind, forming an obtuse angle with the
anterior margin and a rounded junction with the posterior: beaks
anterior, terminal and overhanging, approximated and curved down-
wards as well as inwards.
Surface marked by a few faint concentric lines of growth. In speci-
mens which have the exceedingly thin outer layer of the test exfoliated,
however, which is often the case, the outer surface of the inner layer of
the shell, when examined under a lens is seen to be marked with
crowded radiating striae which are too minute to be visible to the naked
eye. '
Length of an average specimen seventeen millimetres: greatest
height of the same, nine mm.: maximum thickness, nine mm.
East end of Maud Island: four specimens with both valves.
OXYTOMA MUCRONATA, Meek.
Plate 31, fig. 9.
Pteria (Ox;/toma) Munsteri, Meek and Hayden. -1864. Palaeontology of the
Upper Missouri, p. 80,
wood cuts, figs. A, B.
Avicula (Ozvytoma) mucronata, Whitfield. —-1876. Palaeontology of the
Black Hills of Dakota,
p. 357. pl. 4, figs. 1,2.
East side of Alliford Bay, one left valve, which is figured. The same
species also occurs in the Lower Sandstones, or subdivision E, of the
South side of Maud Island.
The types of O. mucronata from the Black Hills of Dakota were
originally regarded by Meek, though with much doubt, as possibly
identical with the Avicula Munsteri of Brown and Goldfuss. Eichwald,
however, in the Lethaea IRossic-a,>l< says that the sculpture of the left
valve of A. Munsteri consists of from sixteen to eighteen radiating ribs,
with intervals furnished with one to three radiating strim, whereas in
large left valves of O. mucronata from Maud Island the primary radia-

* Volume 2, page 504.
239
ting ribs are separated by wide and nearly fiat interspaces, which latter
are occupied with as many as eight or nine radiating raised lines, and
' this seems to be also the case with Meek’s figured type of the same '
species.
In the writer’s judgment, the present shell is more nearly allied to
the Avicula Oornueliana of d’Orbigny, from the French Neocornianfil<
(which Stoliczka says is an Oxytoma) than it is to A. Munsteri.
AUOELLA P1001111. (Gabb.)
Inocera/mus Piochii, Gabb. -1864. Palaeontology of California, Vol. I, p. 187
pl. 25, fig. 173, (excl. fig. 174.)
Aucella Piochii, Gabb. -1869. Idem, Vol. II, pp. 194 and 247, pl. 31,
figs. 92 a—c.
Since the first part of the present volume was published a very charac-
teristic valve of this shell was discovered in Mr. Richardson’s collection
of fossils from the “ Lower Shales ” of Skidegate Inlet west of Alliford
Bay. Although probably only a variety of the Aucella Mosquensis of Von
Buch, if indeed it is sufliciently different therefrom to rank even as a
variety, the occurrence of a specimen of the true A. Piochii at this
horizon is of considerable interest and worthy of being placed upon
record, as throwing some light on the stratigraphical position of the
deposit in which it was found.)
MELINA SKIDEGATENSIS. (N. Sp.)
Melina mytiloides ? Lamarck. This volume, pages 80-82, woodcuts, figs. 8 a, b. c, d.
South side of Allifoi d Bay, in Skidegate Inlet: six large specimens.
The shells described and figured in tho first part of this volume, and
there regarded, though with much hesitation, as possibly varieties of
the Perna mytiloides of Lamarck, are now believed to be perfectly
distinct.
They appear to belong to a previously undescribed species, for which
the name given above is suggested, and to be perhaps most nearly
allied to the Perna Fittoml of Pictet and Campiché,T from the Lower
Greensand of the Isle of Wight and the Gault of Switzerland.

* Paléontologie Frangaise, Terrains Grétacés, Vol. 3, p. 471, Atlas, pl. 389, figs. 3 and 4.
1‘ Paléontologie Suisse. Fossiles de Ste. Croix. Vol. 4, p. 95, pl. 157, fig. 2.
April 8th, 1884. ' 4
240
Inocnamuus MORESBYENSIS. (Nom. Prov.)

Fig. 11. Inoceramus Moresbyensis. Outline of an imperfect left valve to shew
the alation of the hinge line behind the beaks.
Shell moderately convex in front, especially in the umbonal region,
and obliquely compressed behind : posterior dorsal margin abruptly
inflected. Height somewhat greater than the length, greatest length
just below the winged expansion of the hinge-line above : anterior
margin shallowly concave immediately under the beaks and somewhat
convex below : ventral margin rounded narrowly in front and obliquely
as well as more broadly so behind : posterior margin obliquely convex
below, straighter and widening outwards above. Hinge margin appar-
ently ascending above, behind the beaks, in such a manner as to form
a thin alate prominence or expansion whose exact outline is not known
but whose posterior margin seems to have been obliquely truncated or
subtruncated: beaks anterior, terminal, curved inwards and forwards.
Surface marked with numerous, very irregular and rarely continuous
subconcentric plications.
North shore of Cumshewa Inlet, Moresby Island : a few imperfect
specimens.
241
This singular shell, whose characters cannot be very satisfactorily
defined with the material at the writer’s disposal, appears to belong to
that section of the genus of which Inoceramus alatus, Goldfuss,* is the
type. Judging partly by the figure in the “ Petrefacta Germaniae,”
and partly by the description (“ costis concentricis crassis regularibus”)
it would seem that the I. alatus has much broader and more regularly
disposed concentric folds than the present species.
Inoonnmus oonomrrarcus, Parkinson.
For the synonymy of this well known species, see page 79 of the
present volume.
North shore of Cumshewa Inlet, one specimen : Skidegate Inlet, at
Bear Skin Bay (one specimen), and very abundant at South Island.
INOCERAMUS (AcTINocERAMUs) SULGATUS, Parkinson.
Plate 32, figs. 3 & 3a.
Inoceramus concentricus, Parkinson. —1820. Transactions of the Geologi-
cal Society of London. Vol- 5,
p. 59, pl. 1, fig. 5.
“ “ Sowerby. —-1821. Mineral Conchology, pl. 306,
figs. 1-5.
“ “ Goldfuss. —1836. Petrefacta Germaniae, page
112, pl. 110, fig. 1.
“ “ d’Orbigny. -1845. Paléontologie Frangaise,
Terrains Crétacés, Vol. 3, p. 504,
pl. 403, figs. 3-5.
“ “ Pictet & Campiché.--1869-71. Paléontologie Suisse,
Fossiles de Sainte Croix, Vol. 4,
p. 105; which see for a more
extended synonymy of the
species.
Very abundant at and around Bear Skin Bay, on the Graham Island
side of Skidegate Inlet, where thirty-eight good specimens were col-
lected.
In describing this species d’Orbigny says (op. cit. p. 504) that it has
seven or ten radiating ribs, but in the Queen Charlotte Island speci-
mens collected by Dr. Dawson the maximum number of ribs is from
seven to eight, there are frequently only three and sometimes they are
almost obsolete. Pictet, however, in speaking of the ribs of this shell

* Petrefacta Germaniae. Vol. 1, Divisio Quarta, p. 116, pl. 112, fig. 3.
242
(op. cit., p. 106,) says, “leur nombre plus frequent est de sept a huit,”
and adds, “nous avons sur les yeux des echantillons ‘a cinq c6tes, et
plusieurs méme a trois.”
Gmurronucrns GURVATUS, Geinitz.
Plate 32, fig. 4.
Pecten cwrvatus, Geinitz. -1843. Kieslingsw, p. 16, pl. 3,
fig. 13.
-1848. Quadersandstein, p. 180.
Pecten virgatus, d’Orbigny. -1845. Paléontologie Frangaise,
Terrains Grétacés, Vol. 3, p.
602, pl. 434, figs. 7-10, as of
Nilsson, but not P. oirgatus
Nilsson.
Pecten (Camptonectes) curvatus, Stoliczka. —1871. Palaeontologia Indica,
Cephalopoda of S. India, Vol.
3, p. 433, pl. 31, figs. 15-16,
and pl. 41, figs. 433.
?.—-'=C'ampt0nectes extenuatus, Meek. —-1865. Palaeontology of the
Upper Missouri, p. 78, pl. 3,
fig. 6.
“ “ “ Hall and Whitfield. -1877. United States Geologi-
cal and Geographical Ex-
ploration of the Fortieth
Parallel, Vol. 4, p. 290, pl. 7,
fig. 18.
“ “ “ Whitfield. --1876. Palaeontology Of the
Black Hilis of Dakota, p.
353, pl. 4, figs. 4, 5.
K H “
East end of Maud Island, a single right valve. Judging by the
figures and descriptions only it is very difiicult to see how the (lamp-
tonectes extmuatus of Meek is to be distinguished from the U. curvatus
of Geinitz, assuming that Dr. Stoliczka’s synonomy of the latter species
is correct, which the writer has no reason to doubt.
AMUSIUM LENTICULARE. (Nom. Prov.)
Plate 32, fig. 5.
Shell strongly compressed, thin, lenticular ; outline as viewed laterally
nearly circular, the length and height being very nearly equal: anterior,
posterior and basal margins regularly rounded ; beaks small, prominent,
erect, appressed and central; superior border, exclusive of the ears,
descending obliquely, rather rapidly and somewhat concavely on both
243
sides : ears of the upper or left valve equal in size and similar in shape,
ascending obliquely outwards from the beak and truncated also obliquely
at the outer margins. Ears of the under or right valve unknown.
Surface of the upper valve polished and nearly smooth to the naked
eye, but when examined with a moderately powerful simple lens it is -
seen to be marked with exceedingly numerous, minute and very closely
disposed concentric striae, also by very faint and somewhat more distant
radiating lines. Test extremely thin.
Maximum length of the most perfect valve, forty-two millimetres:
height of the same, as measured from the beak to the centre of the
basal margin, forty-five mm.
North Shore of Cumshewa Inlet: two or three specimens in a concre-
tionary nodule of shale.
This shell may be a mere variety of the Oamptonectes bellistriatus of
Meek, (see Palaeontology of the Upper Missouri, page 77) but the
upper margins of the ears of its right valve are ascending and not
straight.
Osrana SKIDEGATENSIS. (Nom. Prov.)
Plate 32, fig. 1.
Ostrea. (Sp. Undt.) This volume, page 83.

Fi.g 12. Oatrea Skidegatensis. Outline of the interior of an upper valve of a,
separate specimen.
244
Shell or shells either single and separate or aggregated into clusters
of two or three individuals : relative convexity of the two valves varia-
ble: shape irregular. Lower valve shallowly convex; upper valve
usually flatter and sometimes a little concave. Lateral outline variable
in different individuals, no two being alike: as a rule though the single
specimens are higher than long, and the clustered individuals are longer
than high, while the narrowest part of the valves in all is, as is custom-
ary in the genus, at the short hinge line. Thus, of the single or separate
specimens some are narrowly elongated in the direction of their height,
their dorso-ventral diameter being nearly twice as great as that from
the buccal to the anal side, and the two sides are nearly parallel, while
others are more or less triangular in their contour and widen out gra-
dually towards the pallial border, though in these also the dorso-ventral
diameter somewhat exceeds the maximum length. In clustered speci-
mens, on the other hand, the valves often expand broadly, irregularly
and laterally at a short distance from the hinge line, and the buccal
margin is broad and nearly straight: in such individuals the length
is nearly twice as great as the maximum height, and the greatest length
is a little below the middle, as in the original of fig. 1 on plate 32.
Muscular scar large, reniform or subovate, situated near to the buccal
margin and about half way between the cardinal and pallial borders.
Surface markings consisting apparently of coarse and irregularly
disposed concentric lines of growth.
Skidegate Inlet, south side of Alliford Bay: two single and two clus-
tered specimensf Skidegate Inlet west of Alliford Bay, J. Richardson,
1872: three separate specimens.
The aflinity of these oysters is obscure, as the range of variation of
the species to which they belong has yet to be ascertained. For the
present, however, it will be convenient to designate them by a local
and temporary name.
GRYPHJEA Nnnrmsonusrs, Meek and Hayden.
Plate 32, figs. 2, 2a, and 2b.
Gryplzam calceola, var. Nebrascensis, M. & H. -1861. Proceedings of the Academy
of Natural Sciences of Philadel-
phia, Vol. xiii. p. 437.
“ “ “ “ -1865. Palaeontology of the Upper
Missouri, p. 47, pl. 3, figs. 1a—e,
and woodcuts A.B-C.D.
“ “ Whitfield. -1876. Palaeontology of the Black
Hills of Dakota, p. 349, pl. 3. figs.
13-16.
(Perhaps a variety of Gryphoea vesieulosa, Sowerby.
245
Compare especially Pictet and Campiche’s description and figures of that
species in the“ Paléontologie Suisse, Fossilés du Terrain Crétacé des environs de
Sainte-Croix, 4me. partie,” p. 311, pl. 194, figs. 1-6.)
East end of Maud Island, very abundant: South side of Alliford Bay,
three good specimens.
The convex valve of the Gryphaaa from the above mentioned localities,
which is the one most commonly preserved, is very variable in its shape
and surface ornamentation. In most of the specimens of the larger
valve collected by Dr. Dawson the beak is acute, but in others the umbo
is distinctly truncated and shows a scar of attachment. The convex
valve of some individuals again is evenly rounded on the back and
entirely devoid of longitudinal grooves or furrows, but in others the
corresponding valve is impressed by a single sulcus, or by two, and in
one instance by as many as three radiating and widely distant sulci.
The surface of all the specimens of the convex valve collected at the
Queen Charlotte Islands is marked by flexuous and concentric lines of
growth, but in some the umbonal region is marked also by irregular
longitudinal striae which (as Prof. Whitfield remarks, op. cit. p. 349),
“ continue to below the middle of the valve,” while in others the longi-
tudinal striae are altogether absent.
The specimens in which the longitudinal striae are well shown agree
perfectly with the descriptions and figures of Gryphcea Nebrascensis by
the authors above cited, but others in which those striae are absent can
scarcely be distinguished from the G. vesiculosa as described and figufed
by Pictet & Campiché.
Mr. Meek regarded the G. Nebrascensis as probably a variety of the
G. calceola of Quenstedt, but for the reasons just stated it seems quite as
likely that it will prove to be conspecific with the G-. vesiculosa of
Pictet & Campiché, if not with the true G. vesiculosa of Sowerby.
BRACHIOPODA.
(?) TEREBRATELLA onnsa, Gabb.
Terebratella obesa, Gabb. . .1864. Palaeontology of California, Vol.1, p. 205, pl.
26, figs. 194 and 194a, b.
South side of Alliford Bay: one nearly perfect but partly exfoliated
dorsal valve, which measures about twenty mm. in breadth by thirteen
in length, and whose surface is marked by from twenty to twenty-two
subangular ribs, also a smaller example with both valves, but with the
246
beak of the ventral valve broken off. North side of Maud Island, a
young ‘but tolerably perfect specimen.
The Alliford Bay specimens correspond very well with the California
types of T. obesa in the great convexity of the valves, in being much
broader than long, and in being marked with a corresponding number
of radiating ribs. The small example from Maud Island looks more like
a Rhynchonella. than a Terebratella, but the same remarks would apply
to Mr. Gabb’s figures of T. obesa. .
ANTHOZOA.
Asrnooaum IRREGULARIS. (N. Sp.)
Plate 33, fig. 1.
Corallum compact, massive, irregular in shape: coralhtes contiguous,
polygonal and mostly hexagonal, averaging from four to five millimetres
in diameter: septa arranged obscurely in three cycles and of dilferent
length in each: primary septa six, extending from the periphery to
the columella: secondary septa six also, but not quite so long as the
primaries: between the primaries and secondaries their intervenes a
third cycle of twelve short irregular septa: upper and outer edges of
the septa, as seen in the calyces, apparently granular; columella styli-
form, more or less conspicuous in the centre of each calyx but not very
prominent: calyces shallow, about one mm. in depth.
South side of Maud Island, two specimens, one of which has been
burrowed into by a Lithodomus. The same species was collected by
Mr. James Richardson in 1872 in Skidegate channel, west of Alliford
Bay.
This coral resembles the Astroccania Reussiana of Stoliezka * in the
number and disposition of its septa, but the corallites of A. irregularis are
contiguous and from four to five mm. in breadth, whereas those of A.
Reussiana are said to be distant and only from one to two mm. in
breadth.
l_gmgu 1 1 A Q__
"‘ Palaeontologia Indica, Cretaceous Fossils of S. Ind.ia- Vol. 4, pt. 4, p. 28, pl- v. figs. 3-5.
247
4.—FRoM THE “ AGGLOMERATES,” 0R SUBDIVISION D. or DR. G. M.
DAwsoN’s REPORT.
The only fossils collected from these rocks are three fragments,
apparently of the shells of Lamellibranchs, one of which looks rather
like a piece of the exfoliated valve of an Ostrea, but the specimens are
far too imperfect to admit of their specific relations being ascertained.
5.——FROM THE “LOWER SANDSTONES,” 0R DIVISION E. or DR. G. M.
DAwsoN’s REPORT.
CEPIIALOPODA.
SCHLOENBACHIA PROPINQUA. (N. Sp.)
Plate 33, figs. 2, 2a, 2b, and 20.
Shell thin, strongly compressed at the sides, and distinctly keeled on
the periphery: maximum thickness about one-fifth of the greatest
diameter. Whorls about four, increasing rather rapidly in size in the
dorso-ventral direction, but very slowly at the sides: umbilicus about
one-third or more than one-third of the maximum diameter, with gently
sloping and obliquely convex sides: keel prominent, simple in the
largest individuals but more or less crenate in young specimens : aper-
ture nearly twice as high as wide, flattened at the sides, narrowly
subelliptical in outline, but emarginated below, though not deeply, by
the encroachment of the preceding volution.
Surface marked by numerous and rather crowded flexuous costae
which extend from the umbilical margin to the keel and which are
most prominent on the outer half of the sides. In very young speci-
mens the ribs pass over the keel, but in larger ones they are distinctly
interrupted or cut through by it. Outer lip broadly concave at the
sides and produced on the periphery into an obtusely pointed beak,
whose lateral margins are obliquely concave. Septation unknown.
Dimensions of the largest specimen, not counting fragments: maxi-
mum diameter forty-nine millimetres: greatest breadth or thickness, ten
mm.: width of umbilicus, as measured from suture to suture, eighteen
248
mm.: height of aperture, nineteen m.m.: maximum width of the same,
ten mm.
South side of Maud Island, seven small specimens, the largest of
which is not more than twenty millimetres (or a little more than three
quarters of an inch) in its greatest diameter. East side of South Bay,
in Skidegate Inlet (“probably from Subdivision E.” Dr. G. M. Dawson)
two specimens, one of which is the largest tolerably perfect one that
has yet been obtained.
At the last mentioned locality a large fragment of one of the whorls
of this species was collected which shows that the specimen when entire
must have been. fully four inches in its greatest diameter. The ribs on
this fragment are fully five mm. apart, and there are no crenations on
its keel. At the South end of Maud Island, associated with the more
normal form, there occurs a variety which has a proportionately
narrower umbilicus, with somewhat steeper sides, but this variety
does not seem to be constant in its characters but to merge gradually
into the more typical form.
Young specimens of the present species and of the Ammonites cordi-
formis of Meek and Haydenfil< of about three quarters of an inch in diame-
ter, or a little more, are exceedingly alike, but at a slightly advanced
stage of growth, the former does not increase much in thickness, and
its keel becomes simple and entire, whereas the latter increases very
rapidly in thickness as it grows older, and its keel is always serrated.
It is not without precedent for a species of Schloenbachia to have a
crenate keel in its young state and a simple keel when older, for
Stoliczka says that this is the case with his Ammonites B landfordianusfi
which Neumayr places in the genus Schloenbachia.
Srmsnonrscus REQUIENIANUS ‘? d’Orbigny.
‘
Plate 22, figs. 4 and 4a.
Ammonites Reqwienianas, d’Orbigny. -1840. Paléontologié Francaise, Terrains
Crétacés, Vol. 1, p. 315. pl. 93.
South side of Maud Island: a badly preserved cast, which agrees
very well, on the whole, with d’Orbigny’s description and figures of the
above named species, but as the septation is not visible in the specimen
collected by Dr. Dawson and as its outer edge is so much water-worn
as to obscure the true characters of the periphery, its identity with
A. Requienianus is rather suggested as possible than decidedly affirmed.

* See Plate 5 of the “ Palaeontology of the Upper Missouri,” figs- 2d and 2e.
’r Palaeontologia Inclica. Cretaceous Fossils of S. India, Vol. 3, p. 46.
249
GASTEROPODA.
PLEUROTOMARIA SKII>EeA'rENsIs, Whiteaves.
9 . . . . ,. - .-
PZcu.rotom.ar'zct /Sl.r:2cZcgate'ns-rs. -1816. Tlns volume, p. 51, pl. 9, 6 and 6a.
South side of Maud Island: one imperfect and badly preserved but
characteristic specimen.
Cz'nulz'a. (Species Undeterininable.)
South side of Maud Island : a cast of the body whorl and part of the
preceding volution of a subcylindrical and apparently undescribed
species with a rather long spire. Very similar specimens, which pro-
bably belong to the same species, were collected in the Lower Shales
of Skidegate Inlet by Mr. James Richardson in 1872.
LAMELLIBRANOI-IIATA.
PLEUROMYA sUBooMI>REssA, Meek, VAR. LAEVIG-ATA.
Plate 33, fig 3.
For the synonymy of this shell see page 222.
South side of Maud Island, one very perfect and undistorted cast and
a fragment of another. The best specimen from this locality differs a
little from the smooth forms of P. subconqnressa collected from the
Lower Shales of Alliford Bay and described on page 224, in being pro-
portionately broader in the direction of their height and in not being so
angular on the anterior and posterior umbonal slopes.
A precisely similar example to the one from Maud Island was
collected by Mr. G. M. Dawson at the Iltasyouco River in 187 6.
CARDIUM TUMIDULUM. (N. Sp.)
I
Plate 33, fig. 4.
Shell extremely small for the genus, strongly convex and very tumid
in the middle, obliquely compressed at the sides, especially above:
greatest thickness through the closed valves about equal to their maxi-
250
mum length. Valves subovate in outline as viewed laterally, somewhat
oblique in some specimens but nearly equilateral in others ; higher than
long and longest immediately below the middle or near the base :
anterior and ventral margins rounded: posterior margin either rounded
or obliquely subtruncated and obtusely subangular at its junction with
the ventral border below : cardinal border very short, and nearly
straight on each side of the beaks, but with its outer angles more or
less rounded off: umbones angular behind, subcentral, very broad,
gibbous and prominent: beaks curved strongly inwards, downwards
and a little forwards: posterior area indistinctly defined.
Entire surface covered with minute and closely arranged radiating
ribs. Hinge teeth and muscular impressions unknown.
Dimensions of an average specimen: maximum length, five milli-
metres and a half: greatest height, six mm. '
South side of Maud Island: six badly preserved single valves.
Judging by its external characters alone, it is not at all unlikely that
this shell may prove to be a species of Cardilia (Deshayes), though that
genus has not yet been recorded as occurring in rocks of Cretaceous age.
In any case the present species is not a true Cardz'um in the most V
restricted sense of the word. It may be an extreme variety of the
Protocardium Shumardi of Meek and Hayden, which latter will be
found described and figured on pages 98—99 of the “Palaeontology of
the Upper Missouri.” '
PROTOCARDIUM. (Species undeterminable.)
Plate 33, fig. 5.
South side of Maud Island: a small but perfect cast of a species of
Protocarclium, whose specific relations cannot at present be determined.
Its posterior area is marked with rather coarse radiating ribs and the
rest of the shell seems to have been concentrically striated.
Nrnuonon FISCHERI,d’O1‘l)lg‘1]y. (Sp.)
The synonymy of this shell will be found on page 234. -
South side of Maud Island : a cast of a left valve.
Lmruononus Mnunnnsrs, Whiteaves.
South side of Maud Island: two single valves of a shell which appear
to be precisely identical with the species from the “Lower Shales ” of
the same Island, described on pages 237 and 238 of the present volume.
251
Oxrrorm MUORONATA, Meek and Hayden.
Plate 33, figs. 6, 6a, and 6b.
South side of Maud Island; several good specimens of both valves.
For critical comments on the characters of this species, with reference
to the publications in which it is described, see page 238, ante.
LIMA. (Species undeterminable.)
South side of Maud Island: three casts of the left valve of a small,
obliquely and narrowly subovate, ribbed species of Lima.
The shell appears to have been rather strongly convex, the front
margin is subangular in the middle in one of the specimens and the
ears are small. The surface of the central area of the cast is marked
by ten radiating ribs, with indications of a minute secondary rib
intercalated between each pair of the larger ones, but the outer por-
tions of the anterior and posterior sides are smooth.
PEGTEN OARLOTTENSIS. (N. Sp.)
Plate as, fig. 7.
Shell compressed, thin, and ovately orbicular, a little higher than
long, margin of the valves rounded at and below the middle, narrowing
abruptly, obliquely and somewhat concavely under the ears above:
shape of the ears not very perfectly known: those of the right valve
appear to be small, and unequal in size, the right being rather the larger
of the two, triangular, straight above and truncated almost at a right
angle at the sides.
Surface marked by about thirty very flat radiating ribs of unequal
breadth, which are crossed by minute, exceedingly numerous and
densely crowded raised lines, or narrow and acute ridges. The radiat-
ing ribs are nearly obsolete in the umbonal region, but are strongly
marked on the lower half of the valves, and are separated by narrow
and not very deep grooves.
Dimensions of one of the most perfect specimens (the one figured) :
length, eighteen millimetres : height, twenty.
South side of Maud Island: apparently abundant, but the specimens
although well preserved are most of them very fragmentary.
252
BRACHIOPODA.
RHYNOHONELLA MAUDENSIS. (N. Sp.)
Plate 33, figs. 8, 8a and 8b.
Shell small, moderately convex, the maximum thickness through
the closed valves being usually about one-third less than their greatest
breadth: length and breadth nearly equal in most specimens but in
others the breadth slightly exceeds the length; outline varying
from rounded subtrigonal or broadly and longitudinally subovate to
subpentagonal and somewhat transversely elongated: front margin
more or less truncated or shallowly emarginated.
Ventral valve tumid in the centre above, and contracting rather
suddenly into a broad and not very deep mesial sinus below : beak of the
same valve small and pointed, curved inward over that of the dorsal:
area small and narrow. Dorsal valve also gibbous and tumid in the '
umbonal region above, convexly, obliquely and abruptly inflected on
both sides of the mesial fold below.
Surface marked with sharply angular, or subangular radiating simple
ribs, which extend from the beaks to the anterior and lateral margins.
On the ventral valve there are from four to six ribs on the sinus, and
seven or eight on each side, while on the dorsal there are from five to
seven on the fold, and seven or eight on each side.
Dimensions of a perfect specimen of average size: length eleven
millimetres: breadth, eleven: maximum thickness, seven mm. Some
individuals are not quite one mm. broader than long, and in others the
thickness is equal to nearly one-half the maximum breadth.
South side of Maud Island, abundant and in good condition.
An interesting little shell, which may prove to be only a small local
variety of the R. gnathophora of Meek. *
DISGINA SEMIPOLITA. (N. Sp.)
Plate 33, figs. 9 and 9a.
Shell, (or rather upper valve, for the under or attached valve is un-
known) depressed conical: height from apex to base about one-half or
a little less than one half the greatest breadth of the base: outline of

’* Palaeontology of California, Vol. 1, p, 39. pL 8, figs. 1 and 1 a—f.
253
base subcircular or ovately-subcircular, the posterior end being usually
a little broader than the anterior, and sometimes nearly straight or
faintly emarginate in the centre. Apex erect, obtuse in some specimens
and more acute in others, subcentral but always placed a little behind
the middle and sometimes as far back as half-way between the middle
of the valve and the posterior margin.
Surface polished and shining to the naked eye, but when examined
with a somewhat powerful simple lens it is seen to be marked with
numerous minute and concentric laminar striae, and there are traces
also of still more minute radiating lines. Test very thin.
Muscular impressions very indistinctly defined: under a lens they
appear to consist of two somewhat reniform or arcuate scars, one on
each side of the apex, which seem to be divergent posteriorly and
convergent anteriorly, though they do not appear to meet in front.
Length of the most perfect specimen figured, seven millimetres:
g1 eatest breadth of the same, six mm. and a-half: approximate height,
three mm.
South side of Maud Island: eight upper valves, or casts of the upper
valve.
As the number and shape of the muscular scars on the interior are
by no means clearly apparent, it is just possible that this shell may be a
Helcion, but its character, on the whole, are much more like those of
a Discina.
GENERAL CONCLUSIONS.
1. THE UPPER SHALES AND SANDSTONES, on SUBDIVISION A.
These rocks, which so far as known contain Inoceramus problematicus
only, probably represent the lowest division of the Upper Cretaceous.
2. THE CoARsE CONGLOMERATES, 0R SUBDIVISION B.
No fossils that can be identified specifically have yet been collected
from these deposits, but from their stratigraphical position they may
be presumed to be synchronous with the Upper Greensand, or Craie
Chloriteé of the French Geologists, and with the Shales and Sandstones
of the “ Dakota Group.”
254
3. THE Lownn SHALES, on SUBDIVISION C.
The Lower Shales are remarkable not only for the occurrence in
them of anthracite coal and clay ironstone, but also for the abundance
and great variety of the fossils which they contain. As the fossils
collected by Dr. Dawson are not all from precisely the same geological
horizon in these shales, it will be desirable to give a list of the species
from each locality before discussing the probable age of the series as a
whole. 1’
A.-FaoM CUMSHEWA INLET.
No. 1. “Fossils from the Peninsula, north shore of Cumshewa Inlet
and at different places a few miles west of the Peninsula. All from
about the same geological horizon, which is supposed to represent sub-
division C of the Skidegate section.” (Dr. G. M. Dawson.)

Spiroeeras Carlottense. Hamites glaber.
Lytoeeras Sacya. Teredo Suciensis.
“ Timotheanum. Trigonia Maudensis.
Haploceras Perezianum. Area, like grammatodon inornatus.
“ Beudanti (abundant.) Inoceramus Moresbyensis.
“ planulatum. “ concentricus,
“ Cumshewaense. Amusium lenticulare.
Ancyloceras Rémondi.
No. 2. “Fossils from the lowest beds recognized at Cumshewa.”
(G. M. D.)
Haploceras Perezianum. Trigonia Maudensis.
Yoldia arata. Amauropsis tenuistriata.
B.——FROM SKIDEGATE INLET.
No. 3. “From Shingle Bay: probably from subdivision C.”
(G. M. D.) '
Lytoeeras Sacya. Amauropsis tenuistriata.
Haploceras Beudanti. Mytilus lanceolatus.
No. 4. “From the east side of Welcome Point: probably C.”
(G. M. D.)
Lytoeeras Sacya.
255
N 0. 5. “ From shore one mile and three quarters south-west of
Welcome Point: probably C.” (G. M. D.)
Nautilus Suciensis. I
No. 6. “ From Bear Skin Bay: C.”
Schloenbachia inflata.
Lytoceras Batesi.
“ Timotheanum.
Martesia carinifera.
Corbula concinna.
Thracia semiplanata.
Tellina Skidegatensis.

No. 7. “From the east side of
(G. M. D.)
Belemnites (densus, var.) Skidegaten-
sis.
Lytoceras Sacya.
anpg
Thetis aflinis.
Callista subtrigona.
Trigonia diversicostata
Nucula (Acila) truncata.
Yoldia arata.
Inoceramus concentricus.
Actinoceramus sulcatus.
Alliford Bay: near base of C.”
Astarte Packardi. Very large.
Oxytoma mucronata.
No. 8. “From the south side of Alliford Bay: near base of C.”
@MD)
Belemnites Skidegatensis.
Olcostephanus Loganianus.
Corbula concinna.
Thracia semiplanata.
Pleuromya subcompressa. Type.
“ \ “ var. Carlottensis.
“ “ var. laevigata.
Callista subtrigona.
Cyprina occidentalis.
Protocardium Hillanum ?

Astarte Packardi.
Trigonia Dawsoni.
N ucula solitaria.
Grammatodon inornatus.
Melina Carlottense.
Ostrea Skidegatensis.
Gryphoea Nebrascensis.
culosa.)
‘? Terebratella obesa.
(Or G. vesi-
N o. 9. “ From the east end of Maud Island : base of C.” (G. M. D.)
Sphenodiscus Maudensis.
Perisphinctes Skidegatensis.
Nerinaea Maudensis.
Cerithium Skidegatense.
Vanikoro pulchella.
Calliostoma constrictum.
Trochactaeon cylindraceus.
Pleuromya subcompressa, var. Carlot
tensis.
5‘ $4“
April 22nd, 1884.

var. laevigata.
Protocardium Hillanum ?
Astarte Packardi.
Nemodon Fischeri.
Trigonoarca tumida.
Modiola (Volsella) subimbricata.
Lithodomus Maudensis.
Camptonectes extenuatus. (Cr C. cur-
vatus.)
Gryphoea Nebrascensis. (Or G. vesicu-
losa.)
5
256 \
No. 10. “ From the north side of Maud Island: C.” (G. M. D.)
Periploma cuspidatum. Trigonia Maudensis. f
Tellina Skidegatensis ‘? var.
No. 11. “ From South Island: C.” (G. M. D.)
Haploceras Perezianum. Thracia semiplanata.
“ Timotheanum. Trigonia Maudensis.
Stephanoceras cepoides. Yoldia arata. *1
Amauropsis tenuistriata. Inoceramus concentricus.
Cinulia pusilla.
N o. 12. “From Hooper’s Creek Tunnel: (G. M. D.)
Unio Hubbardi.
No. 13. “From Coal Locality, south side of Skidegate Channel: base
of C.” (G. M. D.)
Belemnites densus.
No. 14. “From Bay east of Alliford Bay: (G. M. D.)
Amauropsis tenuistriatus. | Nucula'(Acila) truneata.
No. 15. “ From the south side of Maud Island: base of C.” (G.M.D.)
Astrocaenia irregularis.
On the evidence afforded by the fossils as well as on stratigraphical
grounds it would appear that the rocks at both localities in Cumshewa
Inlet and at Nos. 3, 4, 5, 6, 10, 11 and 14 in Skidegate Inlet are unques-
tionably Cretaceous ; that they represent the lower half of the Middle
Cretaceous, and that they are as nearly as possible the exact equivalents
of the Gault of Europe.
At these localities the Lower Shales contain, among others, the follow-
257
ing European Middle Cretaceous species, most of which are eminently
characteristic of the Gault :—
Schloenbachia inflata, Sby. Thetis (major, var.) afrinis.
Haploceras Beudanti, Brngt. Mytilus lanceolatus, Sby.
“ planulatum, Shy. lnoceramus concentricus, Park.
Lytoceras Timotheanum, Mayor. Actinocera-mus Sulcaillls, Park-
And probably
Camptonectes curvatus, Gein. & Gryphaea vesiculosa, Sby.
As might be expected, under the circumstances, some of the fossils of
the Lower Shales range downwards into the Upper Neocomian or latest
division of the Lower Cretaceous, while others extend upward into the
Upper Cretaceous.
Those species which have the downward range indicated are,-—
Ancyloceras Rémondi, Gabb: Aucella Piochii, Gabb, which latter though
rare in the Lower Shales of Skidegate Inlet is abundant in the Upper
Neocomian of the mainland of British Columbia: Nemodon Fischeri,
d’Orbigny, a Russian N eocomian fossil: and Syncyclonema Meekani, Wh.,
which is found also in the upper Neocomian of the valley of the lower
Fraser river, B.C.
Those which range upwards into the Upper Cretaceous are Nautilus
Suciensis and Teredo Suciensis, Whiteaves, both of which occur also in
the Upper Cretaceous of the Sucia Islands, also Nucula (Acila) truncata,
Nucula solitaria and Terebratella obesa of Gabb, which were originally
described from the Chico Group of California.
Two species which have been described and figured by Stoliczka in
his Cretaceous Fauna of Southern India, viz., Ammonites Sacya, Forbes,
which N eumayr says is a Lytoceras, and Trochactoeon cylindraceus,
Stoliczka, are abundant in the Lower Shales of Cumshewa and Skide-
gate Inlets, the former at four localities, viz., Nos. 1, 3, 4 and 5, the
latter so far as known, at Maud Island only, or N o. 9.
Some of the fossils of the Lower Shales occur also in the “Shasta
Group” of California. These are Ammonites Batesi, Trask, which is a
Lytoceras: Ammonites Breweri, Gabb, which is a Hapl0ceras.: Ammonites
Stoliczkanus, Gabb, which is most likely a Hoplites : Ancyloceras Rémondi,
Gabb: Aucella Piochii, Gabb: and probably also Pleuromya pap;/racea,
Gabb.
In a paper “on the Lower Cretaceous Rocks of British Columbia,”
which was published in the first volume of the Transactions of the
Royal Society of Canada, the writer endeavoured to show that the
258
“ Shasta Group” of the Californian geologists is separable, on palaeonto-
logical grounds, into two well-marked divisions, one of which represents
the Upper N eocomian and the other the Gault of Europe. The localities
in British Columbia at which these supposed Upper Neocomian rocks
occur, and a list of the fossils of the latter, with descriptions of three new
species, are given in the paper cited. On the Pacific Coast of the United
States and Canada the most characteristic fossils of the equivalents of
the Upper Neocomian appear to be the Belemnites impressus, Ancyloceras
percostatus and Aucella Piochii of Gabb, which latter shell is almost
unquestionably synonymous with A. Mosquensis Von Buch, of the
Russian N eocomian.
The Gault of Europe seems to be represented in America, not only by
the Lower Shales of the Queen Charlotte Islands, as already suggested,
but also by the fossiliferous porphyrites and felsites of Sigutlat Lake
and the Iltasyouco river, B.C. (which were formerly supposed by the
writer to be of Jurassic age) and by those Californian rocks which were
formerly included in the Shasta Group and which hold such fossils as
Lytoeeras Batasi, H'aploceras Breweri and Hoplites Stoliczkanus.
At the base of the series, however, in Skidegate Inlet, at localities
Nos. 7, 8, 9, 13 and 15, in rocks which, according to Mr. Richardson
and Dr. Dawson form part of the Lower Shales, and associated with
others that elsewhere occur mingled with purely Cretaceous types,
there occur a few fossils which the writer has entirely failed to distin-
guish from the following species that have heretofore been regarded as
Jurassic by American geologists.
Belemnites densus, Meek & Hayden. Modiola (Volsella) subimbricata,Meek.
Pleuromya subcompressa, Meek. (Sev- Oxytoma Nebrascensis, Meek & Hay-
eral varieties.) den.
Astarte Packardi, White. Camptonectes extenuatus, M. & H.
Grammatodon inornatus. Gryphaea Nebrascensis, M. & H.
Moreover, the Vam7wra pulchella. of the Lower Shales is possibly only
a variety of Lyosoma Powelli, White: the Cardium tumidulum of the
Lower Sandstones may be an extreme form of the Protocardium
Shumardz‘ of Meek and Hayden, while the Rhynchonella Maudensis from
the same rocks is very likely onlya small local variety of the R. gnath0-
phora of Meek.
Further, the fossiliferous volcanic rocks of Sigutlat Lake and of the
Iltasyouco River on the mainland of British Columbia (which are
now believed by the writer to be of the same age as the Lower Shales,
as the two formations contain seven species in common, namely, Olcoste-,
259
phanus Loganianus, Pleuromg/a subcompressa, Astarte Packardi, Trigonia
Dawsoni, Grammatodon inornatus, Camptonectes eactenuatus and Gryphoea
Nebrascensis) hold also Modiola (or Volsella) formosa of Meek and
Hayden, and Gervillia Montanaensis of Meek.
The discovery in the Black Hills of Dakota of deposits which were
supposed to be of Jurassic age, principally upon palaeontologieal grounds,
was first announced by Mr. F. B. Meek in 1858, and since that time
numerous species of fossils from rocks of a similar geological horizon
in Utah, Montana and other Western States and Territories, as well as
in California, have been described by Mr. Meek, Professor R. P. Whit-
field and Dr. C. A. White.
The reasons which induced Mr. Meek to regard certain strata in Utah
and Dakota as Jurassic are clearly stated on pages 110 and 111 of
Dr. IIayden’s “Geological Report of the Exploration of the Yellow-
stone and Missouri Rivers” and elsewhere, but the conclusions at
which Mr. Meek arrived, with the somewhat meagre material at
his disposal, although such as any palaaontologist would probably have
come to under the circumstances, appears to the writer to be outweighed
by the additional evidence afforded by the large collection of fossils
since made by Mr. Richardson and Dr. Dawson at the Queen Charlotte
Islands and on the mainland of British Columbia, which throw an
entirely new light on the subject.
Throughout the Western States these supposed Jurassic rocks are
everywhere stated to occupy a position immediately below the sand-
stones and conglomerates of the “ Dakota Group ” (which Meek main-
tains is the equivalent of the English Upper Green Sand) and as
immediately above certain red beds which are generally believed to be
Triassic. Wherever these ostensibly Jurassic rocks occur, therefore,
it follows that part of the Mesozoic series is wanting, and it is difficult
to understand why the Lower Cretaceous and earlier half of the Middle
Cretaceous should always be missing and not the Jurassic.
As will be seen a little farther on, there are good reasons for
supposing that the Agglomerates and Lower Sandstones of the Queen
Charlotte Islands form part of the same formation as the Lower
Shales, but, whether this be the case or not, the three together occupy
almost exactly the same stratigraphical position as the supposed
Jurassic rocks of the Western States. At Cumshewa and Skidegate
Inlets the Lower Shales immediately underlie conglomerates which
are probably synchronous, or nearly so, with those which almost
invariably occur at the base of the “Dakota Group,” and the Lower
Sandstones are succeeded by Upper Triassic rocks, although the two
latter are unconformable.
Turning next to the palaeontologieal aspect of the question, Mr.
260
Meek’s principal argument in favour of regarding the Dakota and
Utah rocks as Jurassic is thus stated in that report of Dr. Hayden’s to
which reference has already been made. “ The organic remains found
in these series present, both individually and as a group, very close
affinities to those in the jurassic epoch in the Old World; so close
indeed, that in some instances, after the most careful comparisons with
figures and descriptions, we are left in doubt whether they should be
regarded as distinct species, or as varieties of well known European
jurassic forms. Among those so very closely allied to foreign jurassic
species may be mentioned an Ammonite we have described under the
name of A. cordiformis, which we now regard as probably identical
with A. cordatus, of Sowerby; a Gryphaea we have been only able to
distinguish as a variety from G. calceola, Quenstedt; a Pecten, scarcely
distinguishable from P. lens, Sowerby; a Modiola, very closely allied
to M. cancellata, of Goldfuss ; a Belemnite, agreeing very well with B.
excentricus, Blainville, &c.”
The strongest point in this argument is the fact first adduced,
namely, the occurrence in the rocks in question of an Ammonite (A.
c0rdi]‘0rmis of Meek and Hayden) which seems to be an Amaltheus
or a Oardioceras, and in either case is a species which is very closely
related to the Ammonites cordatus of Sowerby from the European
Jurassic. But, on the other hand, associated with purely Cretaceous
types, the Lower Shales of Skidegate Inlet contain no less than four
species of Ammonites which if submitted to any European palaeontolo-
gist who had made a special study of the group, without shewing him
any other fossils from the same rocks, would almost certainly be re-
garded as Jurassic. These are Ammonites Richardsoni, Whiteaves, which
is a very typical representative of the Uoronarii of Von Buch, and which
therefore is probably a ;S'tephanoceras: Stephanoceras oblatum and S.
cepoides, whose relations to the Jurassic Macrocephali have been pointed
out on pages 29, 30, 209 and 210 of the present volume; and Peris-
phinctes Skidegatensis, Whiteaves, which as Mr. E. Billings suggested,
(on page 72 of the Report of Progress of the Geological Survey of
Canada for 187 2-73) is of the type of P. tyrannus, N eumayr, from the
“ Macrocephalen Kalken ” of Brielthal.
In regard to the Gryphaea Nebrascensis, which Mr. Meek thought was
possibly a variety of G. calceola, Quenstedt, the specimens from Skide-
gate Inlet shew that the irregular radiating striae on the umbonal
region of the convex valve are as often absent as present, and apart
from this character it is difficult to see how the shells represented by
Meek’s woodcuts of G. Nebrascensis in the “Palaeontology of the
Upper Missouri ” can be distinguished from the G. vesiculosa of
Sowerby as figured by Pictet and Campiché.
261
The Camptonectes bellistriatus of Meek and Hayden, from the Black
Hills of Dakota, looks more like a Cretaceous Amusium or Camptonectes
than it does like the true Pecten lens of Sowerby, which latter species
the writer has had abundant opportunities of studying in the field, in
the Middle and Lower Oolites of the midland counties of England.
Camptonectes extenuatus of Meek and Hayden, as figured by Prof. R. P.
Whitfield in the “Palaeontology of the Black Hills of Dakota,” bears a
remarkably close resemblance to the C. curvatus of Geinitz, from the
Cretaceous rocks of Southern India, as described and illustrated by
Stoliczka.
The Modiola (or Volsella) formosa of Meek and Hayden belongs to a
persistent and recurrent section of that genus, which ranges from the
Jurassic epoch into the recent period, and which Is represented in
northern seas by the Modiolaria nigra. of Gray.
, The very variable guards of Belemnites from the Black Hills and
elsewhere, which Mr. Meek described provisionally under the name B.
densus, may represent two or three species rather than one, and
neither of them seem to present any special characters by which they
can be distinguished as Jurassic species rather than Cretaceous.
Oacytoma mucronata, Meek, for reasons already stated on pages 238
239, appears to be more nearly related to the O. Oorneuiliana of
d’Orbigny, from the French Neocomian, than to the O. Munsteri,
Goldfuss, of the Jurassic, and the typical form of the Pleuromya sub-
compressa of Meek, seems also to be barely separable from the
Pleuromya (or Panopcea) papyracea of Gabb, from the “ Shasta Group”
of California.
From the foregoing considerations the writer has long held the
opinion, first, that the whole of the Lower Shales at Cumshewa and
Skidegate Inlets belong to about the same geological horizon as the
Gault of England and Europe: and secondly, that there are now good
reasons for supposing that many of those rocks in the Western Territo-
ries and California which have been hitherto regarded as Jurassic may
prove to be more nearly the equivalents of the earliest or oldest sub-
division of the Middle Cretaceous.
4. “THE AGGLOMERATES, 0R SUBDIVISION D.”
There is no palaeontologieal evidence which would afford any clue to
the probable age of the rocks of this subdivision.
262
5. “THE Lownn SANDSTONES on SUBDIVISION E.”
Fourteen species of fossils were collected by Dr. Dawson in these
deposits, but three of the former are too imperfect to be determined.
Of the eleven species which remain, five, namely, Pleutomaria Skidegw '
tensis, Pleuromya subcompressa, var. Zaevigata, Nemodon Fz'scheri, Oxytoma
mucronata and Lithodomus Maudensis, occur also in the Lower Shales,
especially towards or at their basal portion: one is doubtfully identi-
fied with the Amrnonites Requienianus of d’Orbigny, which is probably a
Sphenodiscus : and five (viz., Schloenbw hia propingua, Oardium tumidulum,
Pecten Carlolterisis, Rhynchonella Maudensis, and Discina semipolita) are
here described and figured as apparently new.
As nearly one-half of the species collected in subdivision E are also
found in subdivision C, it is upon the whole most likely that the Lower
Shales, the Agglomerates and Lower San dstones of Dr. Dawson’s report,
are all merely local and subordinate subdivisions of the same formation,
and that the three together represent the lower half of the Middle
Cretaceous at this particular locality. It is to be noted, however, that
the two Ammonites which occur in the Lower Sandstones are quite
different from any of the species found in the Lower Shales.
ADDENDUM.
TRIGONIA INTERMEDIA, Fahrenkohl.
I/yriodon intermedium, Fahrenkohl. -1841. “ Ub. einige Fossilien der mos-
kausch u. kalug. Gouv. voy.,
Bull de Mose.” Vol. iv. p. 796,
pl. 19, fig. 2.
Lyrodon clacellatus, G. de Fischer. -1853. Bull de Mose, Vol. 1, p. 127.
Trigonia elarellata, d’Orbigny. (En partie). Paléont. de Russie,
&c., p. 460.
Trigonia intermedia, Eichwald. -1867. Lethaea Rossica, Vol 2. Sect. 1,
p. 601, pl. 24, figs. 13 a and b.
Trigonia Dawsoni, Whiteaves. -1878. Geol. Surv. Can., Rep. Progr.
1876-77, pp. 154 and 155.
“ “ Whiteaves. -1884. This Volume, p. 231,pl. 31, figs.
1 and 1a.
Since the third sheet of the present report was issued, the writer has
ascertained that the Trigonia Dawsoni is almost certainly identical with
the above named Russian Neocomian species.
PLATE XXL
N ATILUS Suomusrs, Whiteaves, (page 197).
Side view of a specimen from Skidegate Inlet.
MESCZOIC FOSSILS
VOL 1 PLATE 21.
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' PI/A TE /YXII.
BELEMNITES DE1\'SUS, Meek & Hayden, (page 194).
Figure 1. Side view of the only guard collected, from the south side of
Skidegate Channel, which is thought to be probably referable
to this species.
BELEMNITES SKIDEGATENSIS (page 195).
Figure 2. Specimen from Alliford Bay in Skidegate Inlet, showing the
phragmocone in situ and a large portion of the guard.
“ 2 a Another example of the guard, also from Alliford Bay.
“ 2 b Ventral aspect of the same.
“ 2 0 Natural transverse section of a specimen of the guard, not far from
the apex of the phragmocone.
SPHENODISOUS MAUDENSIS (page 200).
Figure 3. Side view of the only specimen known, from the east point of
Maud Island-
“ 3 a. Outline of a transverse section of the same.
“ 3 b. Portions of two septa of this species.
Srnnnonrscus REQUIENIANUS (?) d’Orbigny, (page 248).
Figure 4. Cast of the interior of a shell which is doubtfully referred to this
species, from the south side of Maud Island.
“ 4 r1. Outline of the same, as viewed at a right angle to the last, to show
the comparative thickness of the shell, the shape of its aper-
ture and the characters of the periphery.



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PLATE XXIII.
OLOOSTEPHANUS LOGANIANUS (page 211).
Figure 1. Side view of the most perfect specimen known, from Sigutlat
Lake, B.C.
“ 1 a. Portion of a shell of the same species, from the south side of Alli-
ford Bay.
MESO‘Z.'OlC FOS
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PLATE XXI V.
HArLocEr.As Cumsnnwnnnsn (page 208).
Figure 1. Side view of the type specimen from Cumshewa Inlet.
HAMITES (‘?) GLABER (page 213).
Figure 2. Portion of one of the limbs of this species, which shows two dis-
tant oblique constrictions.
a. Another portion of one of the limbs, with only one constriction.
Portion of a septum of the same.
Specimen showing portions of two of the limbs, one of which is
bent closely on the other.
All the specimens figured are from Cumshewa Inlet.
N) N) N)
MESOZOIC FOSSlL5
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PLATE XX V.
Lrroonaxs Saorx, Forbes, (page 203).
Side view of one of the best specimens collected by Dr. G. M. Dawson, from
Bear Skin Bay, Skidegate Inlet.
SlLS
VOL 1 PLATE2 5.
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PLATE XXVI.
IIIAPLOCERAS BEUDANTI, Brongniart, (page 205).
Side view of a specimen from Cumshewa Inlet, with the umbilical
margin broadly rounded.
Portion of a septum of the same.
MESOZOIC FOSSILS
VOL 1 PLATE as
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Figure 2.
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Figure 3.
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Figure 4.
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PLATE XX VII .
Lrrocnaas BATESI, Trask, (page 202).
Side view of a specimen from Bear Skin Bay.
NERINIEA MAUDENSIS (page 214).
A large but imperfect specimen-
Magnified view of a portion of the same.
A young but very perfect individual.
Another immature specimen Whose apex is broken off.
View of a polished longitudinal section of another specimen to
show the characters of the interior of the shell.
All the specimens figured are from the east end of Maud Island.
CERITHIUM SKIDEGATENSE (page 215).
Dorsal view of a specimen from the east end of Maud Island
slightly enlarged.
Magnified view of the last whorl but one of the same, to show the
details of the sculpture.
VANIKORO PULCHELLA (page 215).
Dorsal view of the type specimen from the east end of Maud
Island, enlarged about two diameters.
Ventral view of the same. to show the aperture and imperforate
base.
MESOZOIC FOSSILS
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PLATE XX VIII.
Hxrnocnaxs PLANULATUM, Sowerby, (page 207).
Figure 1. Side view of a small specimen from Cumshewa Inlet.
ANCYLOCERAS REMONDI, Gabb, (page 212).
Figure 2. Side view of a specimen from Cumshewa Inlet
“ 2 a. Outline of a transverse section of the same.
Armunorsrs TENUISTRIATA, Whiteaves, (page 216).
Figure 3. Dorsal view of a specimen from Bay east of Alliford Bay.
OALLIOSTOMA consrnrerun (page 217).
Figure 4. Dorsal view of the type specimen from the east end of Maud
Island.
“ 4 a. Another view of the same to show the imperforate base and shape
of the aperture.
CINULIA PUSILLA (page 217).
Figure 5. Magnified view of an adult specimen from South Island.
“ 5 a. Portion of surface of body-whorl of the same still further enlarged,
to show the sculpture.
I
Tnocuaerznon OYLINDRAOEUS, Stoliczka, (page 218).
Figure 6. Dorsal view of an average specimen, from Maud Island.
‘ MESOZOIC FOSSILS
(EE®IE@CEE[G£lE QIUJEVJEE’ (lDl]" CBQHAIDAEOV VOL 1 PLATE 28‘


L.M.Lambe, del‘. G.E.Desbarats &Co.Lith.
PLATE XXIX.
TEREDI) Sucmnsrs (page 218).
Figure 1. Side view of a left valve from Cumshewa Inlet, somewhat enlarged.
Mxnrnsu. CARINIFERA (page 219).
Figure 2. A nearly perfect cast of the interior of this shell, from Bear
Skin Bay in Skidegate Inlet.
“ 2 a. Portion of a mass of the burrows of this species, from the same
locality as the last.
CORBULA GONCINNA (page 219).
Figure 3. Exterior of a right valve from the south side of Alliford Bay, con-
siderably magnified.
“ 3 or. Left valve of the same specimen, also enlarged.
PERIPLOMA cusrrnarun (page 220).
Figure 4. View of a specimen from the north side of Maud Island, in which
both valves are flattened out.
“ 4 a. Right valve of another individual fro1n the north side of Maud
Island.
“ 4 b. Left valve of a third specimen from the same locality,
THBACIA SEMIPLANATA (page 221).
Figure 5. Exterior of a right valve from the south side of Alliford Bay.
a 5 an n u left 4: .4; u c: D
“ 5 b. “ “ another right valve from the south side of Alliford
Bay.
“ 5 c. Left valve of the same.
PLEUROMYA suncournnssa, typical form, (page 222).
Figure 6. A small right valve from the south side of Alliford Bay.
Pmuaomra SUBGOMPRESSA, var. UARLOTTENSIS, (page 223).
Figure 7. Side view of an imperfect specimen from the south side of Alliford
Bay, showing part of the left valve.
7 a. Side view of another specimen from the same locality, showing
most of the right Valve.
“
‘I§rIE@Ih@ am GDH’

L §~l.Lambe, deli G.l§.Desbarats &Co.L1th.
PLATE XXX.
PLEUROMYA (suneonrnnssx ? va-r.) LJEVIGATA (page 224).
Figure 1. Side view of a perfect specimen from the south side of Alliford
Bay, showing the right valve.
“ 1 a. The same aspect of another and equally perfect cast from Alliford
Bay.
“ 1 c. Do.
“ 1 b. Dorsal view of the same specimen as the last, to show the thick-
ness through the valves.
TELLINA SKIDEGATENSIS (page 225).
Figure 2. A left valve which has the whole of the test preserved.
“ 2 a. Right valve of a cast of the interior of the shell, which shews the
muscular impressions and pallial sinus.
“ 2 b. Side view of another left valve.
All the specimens figured are from Bear Skin Bay, in Skidegate
Inlet.
Figure 3. Right valve of a shell from the north side of Maud Island, which
may possibly belong to this species.
Tnnris AFFINIS (page 226).
Figure 4. View of a perfect cast of the interior of a shell of this species, from
Bear Skin Bay, showing the strong double inflection of the
pallial line.
“ 4 a. The same, as seen from above.
“ 4 b. Cast of a left valve of an ovately subtrigonal specimen, also from
Bear Skin Bay.
PROTOOARDIUM HILLANUM, Sowerby, (page 228).
Figure 5. Right valve of a small specimen from the east end of Maud Island,
which is supposed to be referable to this species. Slightly
enlarged.
Asrxarn PAOKARDI, White, (page 229).
Figure 6. Right valve, of large size, from the east side of Alliford Bay.
“ 6 a. Interior of the same.
“ 6 b. A smaller specimen from the same locality.
MESOZOIC FOSSILS
VOL 1 PLATE 30.
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G.E.De-sbarats &Co.L1tl-I
L.M.Lambemiel*:
PLATE XXX].
TBIGONIA DAWSONI, Whiteaves, (page 231).
Figure 1. Left valve of a specimen from the Iltasyouco River, BC.
“ 1 a. Right valve of a specimen from the south side of Alliford Bay.
Norn.—This species, as stated on page 261, appears to be synonymous with
Trigonia intermedia, Fahrenkohl.
TRIGONIA MAUDENSIS (page 230).
Figure 2. Side view of a right valve of the most perfect specimen collected by
Dr. G. M. Dawson, from the north side of Maud Island.
NUGULA SOLITARIA, Gabb, (page 232).
'Figure 3. Side view of a cast of the interior with a small portion of the test
remaining, slightly enlarged. From the south side of Alli-
ford Bay.
“ 3 a. Outline of the same specimen as viewed in front.
YOLDIA ARATA (page 233).
Figure 4. Lateral view of a specimen from South Island, somewhat enlarged ,
and showing the right valve.
“ 4. a. Another individual, from the same locality, in which the posterior
extremity is more narrowly cuspidate.
N EMODON FISGHERI, d’Orbigny, (page 234).
Figure 5. Side view of a perfect left valve from the east end of Maud Island.
TRIGONOARGA TUMIDA (page 235).
Figure 6. A perfect right valve of this species from the east end of Maud *
Island.
MY'r1LUs LANGEOLATUS, J. Sowerby, (page 236).
Figure 7. Lateral view of a cast of the interior, from Shingle Bay, showing
the left valve.
Outline of the base of the same specimen.
GRAMMATODON INORNATUS, Meek & Hayden, (page 235).
Figure 8. - Side view of a specimen from Gushewa Inlet.
“ 8 a. “ “ “ the south side of Alliford Bay, in
Skidegate Inlet.
“ 8 b. Do.
Oxrroma MUCRONATA, Meek, (page 238).
Figure 9. A left valve from the east side of Alliford Bay.
- ‘ \ - . MESOZOIC FOSSILS.
@ZE®ZL@DCEH(E£JiE mm mm @425-tasters. VOL‘ 1 PLATE BL



’ l...M.Lamb‘e. deli G.E.Desbarats 5: Co.Lith.
PLATE XXIII
OSTREA SKIDEGATENSIS (page 243).
Figure 1. A clustered specimen from the south side of Alliford Bay, as viewed
from above.
GRYPHZEA NEBRASGENSIS, Meek & Hayden, (page 244).
Figure 2. Specimen from the south end of Alliford Bay.
“ 2 a. Another view of the same, to show the smaller and flatter valve.
“ 2 b. “ “ “ “ amount of the convexity of
the convex valve and its strongly incurved beak.
INOCERAMUS (AGTINOQERAMUS) SULCATUS, Parkinson, (page 241).
Figure 3. Side view of a specimen from Bear Skin Bay Skidegate Inlet,
showing the right valve and part of the left.
“ 3 a. Another view of the same specimen, showing the left valve only.
OAMPTONEGTES GURVATUS, Geinitz, (page 242).
Figure 4. A right or under valve, from the east end of Maud Island.
AMUSIUM LENTIGULARE (page 242).
Figure 5. An upper valve from Cumshewa Inlet with both ears well pre-
served. A portion of the sculpture, magnified, is represented
on the right hand side of the lower part of the figure.
Lrrnononos MAUDENSIS (page 237).
Figure 6. Side view of a specimen from the east end of Maud Island, some-
what enlarged.
“ 6 a. Another view of the same, to show the amount of convexity of the
closed valves.
MESOZOIC FOSSILS
VOL I PLATE 32.


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