bigram

This is a table of type bigram and their frequencies. Use it to search & browse the list to learn more about your study carrel.

bigram	frequency
outer lip	191
microscopic foraminifera	112
inner lip	101
muscular impressions	97
genus composed	89
fossil species	75
cardinal teeth	67
lateral teeth	60
one valve	60
body whorl	59
de blainville	55
muscular impression	54
palleal impression	52
last whorl	51
low water	43
similar species	41
impressions two	40
recent species	39
bivalve shells	38
bivalve shell	36
british shells	35
lip thickened	34
spire short	34
columellar lip	33
family contains	32
one species	32
generic name	31
west indies	30
sessile cirripedes	29
lower valve	29
operculum horny	28
following genera	28
fossil state	28
london clay	27
lip thin	27
shaped like	26
general form	26
term applied	26
british species	25
land shells	24
beautifully coloured	24
pedunculated cirripedes	24
ligament external	23
rounded anteriorly	23
water shells	23
one side	23
external surface	23
first section	23
conchifera dimyaria	22
order conchifera	22
several species	22
ventral margin	22
well known	22
channel isls	21
external ligament	21
dorsal margin	21
coloured plates	21
family belonging	21
numerous whorls	21
shells composing	21
tropical climates	21
commonly called	21
without teeth	21
aperture oval	20
many species	20
genus helix	20
natural history	19
genus formed	19
parietal valves	19
upper valve	19
conchological illustrations	19
greater part	19
cardinal tooth	19
outer lips	19
red sea	19
species occur	18
four valves	18
will find	18
indian ocean	18
pearly within	17
bantry bay	17
second family	17
order trachelipoda	17
fresh water	17
two valves	17
new zealand	17
posterior side	17
shells belonging	16
first order	16
name given	16
two cardinal	16
deep water	15
one end	15
first family	15
second section	15
lip spread	15
lateral tooth	15
aperture large	15
inner edge	15
inner surface	15
small species	15
upper part	15
lower part	15
short canal	14
fossil shells	14
anterior extremity	14
de montfort	14
aperture wide	14
great britain	14
south america	14
soft parts	14
terminating anteriorly	13
marine shells	13
several fossil	13
cloth bds	13
spiral shell	13
triangular disc	13
british museum	13
east indies	13
new edition	12
ligamentary pit	12
opercular valves	12
great number	12
anterior margin	12
new holland	12
greater number	12
north america	12
marine substances	12
brown epidermis	12
chambered shells	12
fossil shell	12
genus described	12
two species	12
spiral shells	12
second order	12
anterior side	12
nearly straight	11
common name	11
two muscular	11
one hundred	11
univalve shells	11
increasing whorls	11
third family	11
nearly allied	11
shelly matter	11
multivalve shells	11
univalve shell	11
posterior extremity	11
large sinus	11
whole length	11
horny epidermis	10
larger valve	10
genus proposed	10
placed near	10
new species	10
adductor muscles	10
hinge linear	10
genus differs	10
aperture entire	10
tropical seas	10
genus consisting	10
three species	10
small shells	10
tertiary beds	10
two lateral	10
slightly thickened	10
left valve	9
cape clear	9
symmetrical univalves	9
common species	9
species known	9
common oyster	9
lip reflected	9
mostly tropical	9
loch fyne	9
tropical regions	9
horny operculum	9
shell univalve	9
known genus	9
term used	9
three cardinal	9
new genus	9
beautiful shells	9
first genus	9
molluscous animals	9
aperture long	9
water mark	9
lip slightly	9
extra cloth	9
fossil genus	9
epidermis thin	9
internal ligament	9
posterior margin	9
remote lateral	9
spiral univalves	9
hinge rectilinear	9
outer surface	8
attached valve	8
two rows	8
valves closed	8
large genus	8
conchological writers	8
impressions one	8
indian seas	8
polythalamous cephalopoda	8
order gasteropoda	8
rapidly increasing	8
paracephalophora monoica	8
two small	8
aperture small	8
common garden	8
third order	8
columella smooth	8
latter genus	8
shaped process	8
next family	8
de ferussac	8
natural size	8
anterior canal	8
see frontispiece	8
specific name	8
thickened within	8
genus separated	8
various parts	8
two genera	8
short spire	8
south wales	8
easily distinguished	8
right valve	8
now known	8
testaceous mollusca	8
anterior part	8
species found	8
patelliform shells	8
general appearance	8
lip simple	8
shores generally	8
triangular area	7
nearly obsolete	7
following families	7
two parts	7
shells resembling	7
large aperture	7
genus dentalium	7
hinge without	7
may easily	7
shell thick	7
shell bivalve	7
known species	7
generic characters	7
new genera	7
dorsal margins	7
west indian	7
two diverging	7
two feet	7
bony appendage	7
order lamellibranchiata	7
valve flat	7
slightly curved	7
little shells	7
russell street	7
palleal impressions	7
one extremity	7
shallow water	7
great russell	7
dorsal edge	7
valve attached	7
successive layers	7
two distinct	7
well defined	7
first division	7
outer edge	7
british shores	7
see introduction	7
accessary valves	7
coloured figures	7
genus founded	7
posterior part	7
replied mr	7
principal valves	7
easily known	7
pretty little	7
thesaurus conchyliorum	7
marine conchacea	7
marine bodies	7
aperture narrow	7
columella tortuous	7
fourth family	7
aperture generally	7
spire long	7
rather irregular	6
handsome species	6
salt water	6
generic character	6
single piece	6
may also	6
symmetrical shells	6
young state	6
four species	6
one lateral	6
placed among	6
sandy shores	6
internal cartilage	6
lip smooth	6
operculum shelly	6
two kinds	6
histoire naturelle	6
british channel	6
whorl large	6
regular spire	6
nearly resembles	6
slightly raised	6
naturelle des	6
found near	6
organic remains	6
hinge margin	6
posterior fold	6
many new	6
great variety	6
hinge line	6
genus chiton	6
transversely oval	6
umbones terminal	6
description includes	6
fine shell	6
highly finished	6
three feet	6
genera contained	6
straight line	6
also used	6
lip thick	6
full grown	6
rock pools	6
conchifera monomyaria	6
anterior termination	6
genera may	6
sometimes called	6
exquisitely coloured	6
posterior muscular	6
genus bulla	6
philippine islands	6
pacific ocean	6
inhabits stone	6
crown vo	6
internal cast	6
genus trochus	6
two british	6
byssus passing	6
next genus	6
turned towards	6
sir william	6
diverging cardinal	6
reversed species	6
will serve	6
new south	6
genus contains	6
one muscular	6
second division	6
elegantly hf	6
drying paper	6
spiral cone	6
shaped cavity	6
aperture round	6
prominent fulcrum	6
small teeth	6
hinge lamina	6
several small	6
genus unio	6
valves four	6
found buried	6
green sand	6
order contains	6
symmetrical convolute	6
shelly tube	6
operculum concentric	5
sometimes nearly	5
tabular view	5
opposite side	5
best known	5
emarginated anteriorly	5
every respect	5
also applied	5
text book	5
partly external	5
large species	5
south sea	5
many cases	5
gilt edges	5
plates beautifully	5
southern coasts	5
generally smooth	5
pretty shell	5
shells contained	5
beautiful genus	5
spiral univalve	5
murex haustellum	5
symmetrical conical	5
may find	5
full natural	5
whole shell	5
right side	5
penultimate whorl	5
internal cavity	5
last genus	5
paper sailor	5
two pieces	5
class mollusca	5
various british	5
conical species	5
triangular pit	5
irregularly twisted	5
hinder part	5
slight posterior	5
several genera	5
seven species	5
line drawn	5
gradually increasing	5
ligament internal	5
forms part	5
frequently found	5
internal structure	5
nearly equal	5
diverging teeth	5
two teeth	5
various localities	5
opposite direction	5
will give	5
spire produced	5
british mollusca	5
genus resembles	5
chondrus crispus	5
partly internal	5
third section	5
proposed genus	5
recurved canal	5
generic distinction	5
southern europe	5
typical species	5
now living	5
genera enumerated	5
cylindrical form	5
aperture effuse	5
genus voluta	5
operculum consisting	5
dorsal valve	5
two groups	5
slit near	5
smaller valves	5
anterior muscular	5
denticulated within	5
thick epidermis	5
slightly reflected	5
shell thin	5
ventral margins	5
transversely elongated	5
british seas	5
improved edition	5
beautiful species	5
species belong	5
joined together	5
two inches	5
dorsal keel	5
species described	5
bulinus decollatus	5
also found	5
one way	5
rounded whorls	5
red sandstone	5
pholas dactylus	5
may probably	5
aperture ovate	5
many instances	5
spire equal	5
unequal valves	5
garden snail	5
large size	5
epidermis thick	5
singular genus	5
inches long	5
light brown	5
inferior oolite	5
strongly marked	5
dorsal part	5
principal part	5
aperture sub	5
one genus	5
royal vo	5
minute fossil	5
common snail	5
slightly gaping	5
pollicipes mitellus	5
genus lepas	5
green colour	5
flat valve	5
recent shells	5
defined genus	5
almost entirely	5
one dorsal	5
internal surface	5
widely distributed	5
first instance	5
nearest approach	5
invertebrated animals	5
umbones separated	5
large valve	5
greatest distance	5
genera included	4
calcareous matter	4
deep red	4
fissure near	4
one single	4
smaller ones	4
conical univalves	4
canal short	4
rostrated posteriorly	4
sometimes found	4
shaped prominence	4
peritreme entire	4
read plate	4
another view	4
vide table	4
near london	4
hitherto known	4
microscopic shell	4
laterally compressed	4
family may	4
sinuous septa	4
marine substance	4
genera taken	4
third division	4
common whelk	4
nearly equilateral	4
whorls angulated	4
observed mr	4
six inches	4
order ii	4
valves equal	4
shaped base	4
british coasts	4
will soon	4
one tooth	4
gilt cloth	4
wide aperture	4
twelfth class	4
sometimes used	4
zoological illustrations	4
rare species	4
single genus	4
present known	4
plant remains	4
internal groove	4
shelly plate	4
literary gazette	4
internal shell	4
fine species	4
bivalves belonging	4
nearly flat	4
two folds	4
found attached	4
whorls tumid	4
natural state	4
apex turned	4
two auricles	4
true ligament	4
brachiopodous bivalves	4
ligament partly	4
spire covered	4
coronular multivalves	4
posterior dorsal	4
less globular	4
native species	4
fine specimens	4
nearly closed	4
ten feet	4
green epidermis	4
imaginary line	4
hinge teeth	4
fluviatile conchacea	4
british isles	4
voluta musica	4
garden slug	4
generally tuberculated	4
azeca tridens	4
red colour	4
one pair	4
brackish water	4
solarium perspectivum	4
cloth gilt	4
last family	4
nearly round	4
also several	4
oxford clay	4
upper greensand	4
sometimes hidden	4
fresh waters	4
second edition	4
striking face	4
cerithium telescopium	4
one recent	4
sinuated posteriorly	4
warm climates	4
aperture oblong	4
milford haven	4
cartilage placed	4
ribs radiating	4
operculum spiral	4
spiral extremity	4
oval form	4
chinese seas	4
water mollusca	4
angulated whorls	4
shell named	4
animal lies	4
completely closed	4
two orders	4
northern seas	4
buccinum undatum	4
british co	4
nautilus pompilius	4
little shell	4
living species	4
hinge toothless	4
impressions distant	4
whorls rounded	4
flat area	4
conchological manual	4
lips thickened	4
three teeth	4
shaped shells	4
rostellaria pes	4
accessory pieces	4
two equal	4
large umbilicus	4
lip septiform	4
aperture elliptical	4
applied generally	4
shell generally	4
name proposed	4
lip expanded	4
large number	4
smaller species	4
first time	4
external shell	4
de ferrusac	4
nearly hidden	4
free valve	4
symmetrically convolute	4
tertiary strata	4
work will	4
slight emargination	4
one specimen	4
form part	4
much dilated	4
equal parts	4
oval aperture	4
class acephalophora	4
warm seas	4
many genera	4
many others	4
upper beds	4
small genus	4
cast ashore	4
species hitherto	4
familiar example	4
central disc	4
genus derives	4
meleagrina margaritifera	4
six parietal	4
first group	4
english name	4
often found	4
considerably enlarged	4
many brit	4
bound morocco	4
two last	4
generic distinctions	4
placed within	4
will bear	4
turned backwards	4
aquatic plants	4
dipsas plicatus	4
generally thin	4
collection may	4
oblique folds	4
hinge straight	4
spirally striated	4
order monopleurobranchiata	4
neville wood	4
diverging ribs	4
edges gilt	4
conical form	4
top edges	4
adductor muscle	4
pallets shelly	4
jackson hooker	4
singular shell	4
common british	4
testaceous appendage	4
last mentioned	4
nearly always	4
small portion	4
containing helix	4
two elongated	4
mineral conchology	4
empty shells	4
shell resembling	4
finely coloured	4
zoological journal	4
young specimen	4
two adductor	4
hippopus maculatus	4
septa simple	4
shells described	4
dead shells	4
prominent tooth	4
convolute univalves	4
longitudinal ribs	4
lip crenated	4
next thing	4
paracephalophora hermaphrodita	4
molluscous animal	4
spire obtuse	4
one cardinal	4
shell resembles	4
one remote	4
among seaweeds	3
spire acute	3
plate vi	3
two tentacula	3
depressed cone	3
much resembles	3
teeth placed	3
lip crenulated	3
small folds	3
conchological system	3
posterior sinus	3
spire hidden	3
lateral one	3
also placed	3
finely striated	3
catalogue published	3
imperfectly described	3
sur les	3
illustrated index	3
will take	3
perna ephippium	3
will see	3
lower extremity	3
manuel de	3
vermilia triquetra	3
generic forms	3
scarcely spiral	3
aperture turned	3
long canal	3
generic term	3
tellina radiata	3
genus appears	3
contains two	3
partly answers	3
last century	3
genus spirula	3
one mass	3
established genera	3
breathe air	3
genera renulina	3
paludina impura	3
many specimens	3
cold chisel	3
dark coloured	3
brown bands	3
pearl oyster	3
foliated structure	3
whorls less	3
brit co	3
horny texture	3
generally considered	3
pupa uva	3
testaceous animals	3
symmetrical bivalves	3
generic species	3
shell composed	3
floating timber	3
elongated muscular	3
three different	3
minute species	3
sixth family	3
animal matter	3
regularly formed	3
already acquainted	3
shells composed	3
helix nux	3
muscular foot	3
shore line	3
minute land	3
siphonal scar	3
present day	3
like markings	3
rounded like	3
easily obtained	3
nearly central	3
five valves	3
plate viii	3
see columella	3
upper whorls	3
next lesson	3
attached bivalves	3
elegantly gilt	3
seventh family	3
caudal canal	3
lip dentated	3
found principally	3
present time	3
concholepas peruviana	3
plate vii	3
open extremity	3
three diverging	3
partly amphibious	3
contains many	3
formerly considered	3
opposite valve	3
peduncle hairy	3
natural position	3
ribs smooth	3
small family	3
substance passing	3
left side	3
last volution	3
human body	3
deep notch	3
well marked	3
apicial extremity	3
hammer oyster	3
shell like	3
old shell	3
little ear	3
supplementary volume	3
ampullaria avellana	3
coiled round	3
distinct lateral	3
genus patella	3
different kinds	3
replied charles	3
species now	3
will recollect	3
aperture transverse	3
take place	3
thin shell	3
beautiful work	3
general characters	3
isocardia cor	3
herne bay	3
columella contiguous	3
allied genus	3
principal difference	3
placed horizontally	3
among univalves	3
atlantic oceans	3
genus anomia	3
smooth columella	3
young collector	3
various species	3
posterior extremities	3
joseph hooker	3
two prominent	3
pupa secale	3
much smaller	3
one adductor	3
third edition	3
rapidly enlarging	3
whorl covers	3
various genera	3
british rivers	3
singular fossil	3
within reach	3
natural system	3
many fossil	3
long straight	3
small cardinal	3
ancient name	3
william jackson	3
tube closed	3
upper surface	3
inhabit fresh	3
fucus vesiculosus	3
like projection	3
small shell	3
large shells	3
front view	3
another genus	3
turned suddenly	3
one auricle	3
margin reflected	3
neat little	3
plate xiii	3
tertiary deposits	3
margin dilated	3
great many	3
rather square	3
young shell	3
interesting genus	3
oval shape	3
rather short	3
valves free	3
rounded species	3
present state	3
plate xii	3
mouth oblique	3
large open	3
unio alatus	3
transverse septa	3
hinge consisting	3
genus containing	3
swan sonnenschein	3
shell oval	3
monothalamous cephalopoda	3
first formed	3
resembling corbula	3
anterior slope	3
larger size	3
canal closed	3
microscopic genera	3
large enough	3
dorsal ridge	3
plate ii	3
terebra maculata	3
floating wood	3
three orders	3
regularly spiral	3
genus includes	3
thin epidermis	3
later writers	3
sedentary annelides	3
animal kingdom	3
inclining towards	3
one division	3
india islands	3
first sight	3
des mollusques	3
spire flat	3
margin toothed	3
shall proceed	3
carboniferous limestone	3
imaginary axis	3
readily recognised	3
external characters	3
plate iii	3
oblique fold	3
apex terminal	3
east indian	3
shells resembles	3
valve produced	3
wide hiatus	3
turned inwards	3
narrow aperture	3
oblique direction	3
shelly operculum	3
remarkable shell	3
cloth boards	3
one elongated	3
peter gray	3
crenulated margins	3
water mussels	3
auricula caprella	3
nd edition	3
valves placed	3
curious shell	3
baculite limestone	3
plate xi	3
four unequal	3
good hope	3
internally concave	3
elastic ligament	3
spiral lines	3
pretty species	3
genus bulinus	3
united states	3
neatly half	3
present genus	3
two strong	3
together side	3
family partly	3
coloured epidermis	3
damp places	3
aperture contracted	3
second class	3
sir joseph	3
spire rather	3
genus ostrea	3
often thrown	3
aperture rounded	3
cotton wool	3
two short	3
warm water	3
natatory organs	3
common shell	3
without shells	3
raised points	3
polyphemus glans	3
nearly symmetrical	3
tendon passing	3
vermetus lumbricalis	3
four inches	3
de conchyliologie	3
trochus iris	3
sometimes almost	3
general character	3
ovulum volva	3
arranged circularly	3
aperture notched	3
nautilus umbilicatus	3
foreign bodies	3
lateral ones	3
ranella ranina	3
species may	3
lamarck makes	3
posterior ventral	3
near fresh	3
distribution general	3
shell gaping	3
radiately ribbed	3
plate ix	3
almost black	3
canal turned	3
apex pointed	3
external view	3
let us	3
umbilicus large	3
west india	3
simply conical	3
smooth epidermis	3
dorsal plate	3
two smaller	3
exclaimed lucy	3
another species	3
helix algira	3
plate xxi	3
epidermis horny	3
de malacologie	3
coronula testudinaria	3
larger species	3
plate xvi	3
foreign genus	3
including many	3
genus will	3
plate iv	3
umbilicus small	3
several oblique	3
two pairs	3
contrary case	3
de la	3
plate xxii	3
generic names	3
great majority	3
nearly resemble	3
shells differs	3
corresponding cavities	3
achatina virginea	3
distinct head	3
th edition	3
one whorl	3
turbo pica	3
solen ensis	3
lip wanting	3
bulla ampulla	3
tooth near	3
fibrous structure	3
one anterior	3
order cephalopoda	3
sometimes termed	3
small external	3
three last	3
posterior canal	3
single specimen	3
old red	3
valve conical	3
among moss	3
conques fluviatiles	3
alphabetical part	3
two latter	3
adult state	3
british loc	3
umbones incurved	3
genus murex	3
aperture circular	3
genus differ	3
genus belemnites	3
lower beds	3
pocket lens	3
genera will	3
conus nocturnus	3
base obtuse	3
bore holes	3
common eatable	3
south downs	3
apex acute	3
thickened columellar	3
velvety epidermis	3
genus resemble	3
two families	3
shall find	3
warmer seas	3
rather flat	3
spirally grooved	3
pretty shells	3
gaping anteriorly	3
genus belonging	3
containing upwards	3
name applied	3
various places	3
raised lines	3
great oolite	3
fifth family	3
spiral groove	3
smart blow	3
bent inwards	3
olive green	3
external area	3
angular sinus	3
internal channel	3
greatly resembles	3
simple septa	3
marine genus	3
widely diffused	3
conques marines	3
plate xv	3
genus turbo	3
compressed cone	3
th class	3
shaped projection	3
cemoria flemingii	3
will also	3
single tooth	3
commonly known	3
much depressed	3
valves together	3
plate xx	3
lamarck places	3
coloured like	3
external covering	3
enumerates species	3
commonly used	3
whole collection	3
plate xviii	3
one long	3
valuable work	3
indigenous botany	3
secondary rocks	3
sepia officinalis	3
submarine substances	3
always regular	3
new layer	3
found among	3
ovulum verrucosum	3
reaching across	3
put away	3
dorsal surface	3
great numbers	3
small group	3
valves unequal	3
one fold	3
cancer friend	3
shells will	3
perfectly formed	3
spire consists	3
coralline crag	3
indian oceans	3
spire nearly	3
columella plaited	3
new plates	3
rapidly enlarged	3
different parts	3
closely resemble	3
harpa ventricosa	3
bent forwards	3
thin plate	3
generally regular	3
great thickness	3
close together	3
rocks occur	3
numerous species	3
slightly angulated	3
will scarcely	3
section contains	3
far north	3
exotic conchology	3
impression sinuated	3
chemical composition	3
order pulmobranchiata	3
turned back	3
will keep	3
equal length	3
spire elevated	3
slightly incurved	3
brackish marshes	3
advancing beyond	3
lutraria papyracea	3
british birds	3
upper edges	3
greenish brown	3
already noticed	3
numerous ribs	3
depressed areas	3
fourth order	3
posterior lateral	3
spirula peronii	3
next group	3
feet deep	3
spire generally	3
epidermis without	3
upper fresh	3
bradford clay	3
high water	3
anterior dorsal	3
see plates	3
exquisitely beautiful	3
one part	3
hinge callous	3
sandy beds	3
septa perforated	3
become familiar	3
depressed species	3
apex central	3
flattened spire	3
containing figures	3
water shell	3
shells differ	3
chorda filum	3
axis perforated	3
helix hispida	3
five hundred	3
bullia vittata	3
mouth downwards	3
plate xix	3
elastic substance	3
found fossil	3
two hundred	3
curved tooth	3
first place	3
see auriculated	3
systematic arrangement	3
umbones spiral	3
aperture straight	3
small quantity	3
spire longer	3
less oval	3
several parts	3
tertiary formations	3
radiating ribs	3
plate xvii	3
splendid work	3
mountain limestone	3
surface smooth	3
thick tooth	3
almost every	3
lingula flags	3
shell may	3
oval species	3
ovulum gibbosum	3
will answer	3
first species	3
much sought	3
ricinula horrida	3
largely quarried	3
placed side	3
aperture terminating	3
internal appendage	3
hair brush	3
aperture angulated	3
shells may	3
living specimens	3
dorsal line	3
radiately striated	3
animaux sans	3
lip flat	3
degree resembling	3
teeth none	3
genera belonging	3
valves joined	3
horizontal position	3
accessary pieces	3
shells separated	3
south american	3
will appear	3
feathered tribes	3
extending beyond	3
generally adopted	3
various brit	3
de belvue	3
smaller groups	3
inserted lamina	3
properly belonging	3
southern ocean	3
spiral disc	3
prominent folds	3
one piece	3
admirable work	2
good specimens	2
ligament long	2
perfectly symmetrical	2
margin sulcated	2
muddy bottoms	2
like ammonites	2
trochiform species	2
lower disc	2
two whorls	2
three views	2
aperture subtrigonal	2
feathery tentacula	2
river valleys	2
coronated spire	2
highly esteemed	2
british fossil	2
soft mud	2
greater distance	2
taken chiefly	2
ornamental purposes	2
shells attached	2
solid rock	2
nearly related	2
open aperture	2
increased knowledge	2
trigonal aperture	2
true molluscs	2
obliquely transverse	2
lower end	2
reflected canal	2
thickened internally	2
boiling water	2
one british	2
inner lips	2
retractile proboscis	2
must notice	2
certain species	2
internal view	2
shell will	2
one set	2
many points	2
linear ribs	2
sufficient reason	2
whole surface	2
generally striated	2
extensive series	2
peritreme thin	2
heavily laden	2
corresponding part	2
hollow formed	2
appear like	2
genus psammobia	2
warmer parts	2
slightly convex	2
lignite band	2
several new	2
impressions four	2
unio pictorum	2
margins close	2
will depend	2
wormskioldia sanguinea	2
pieces composing	2
generally attached	2
little bone	2
sometimes rather	2
proserpina nitida	2
always bivalve	2
foot protrudes	2
moveable spines	2
generally marked	2
genus consists	2
terminated anteriorly	2
stagnant pools	2
genus clausilia	2
general history	2
true bivalve	2
species called	2
three openings	2
nautilus triangularis	2
apex placed	2
venerupis perforans	2
grown shell	2
singular anomaly	2
concentrically laminated	2
two anterior	2
generally acknowledged	2
side elongated	2
without chambers	2
ampullaria globosa	2
sans vertebres	2
anomia ephippium	2
breadth throughout	2
polished shell	2
nassa neritoidea	2
stained sands	2
ribs running	2
respects resembling	2
natural objects	2
tumid varix	2
gradually narrowing	2
aperture emarginated	2
familiar introduction	2
whorls spirally	2
prettily marked	2
molucca isles	2
surface ribbed	2
perfectly distinct	2
corbis fimbriata	2
genera miliola	2
now finished	2
nearly horizontal	2
sharp edge	2
strong plaits	2
shell figured	2
continued mr	2
two marginal	2
side large	2
hot springs	2
name bullia	2
rolled back	2
back elevated	2
medical botany	2
laminar tooth	2
parallel grooves	2
concealed beneath	2
accompanying figure	2
distinct cardinal	2
kimmeridge clay	2
two sets	2
numerous plaits	2
worn away	2
viviparous mollusca	2
six species	2
years ago	2
typhis tubifer	2
elongated lateral	2
brilliant pearly	2
northern coasts	2
genus present	2
first sub	2
well developed	2
whorl contracted	2
sometimes tortuous	2
periodic mouths	2
lima squamosa	2
new shells	2
pure sand	2
lips continuous	2
genus terebra	2
small pieces	2
spire small	2
opposite part	2
cerithium aluco	2
smaller extremity	2
plate xiv	2
paternoster square	2
marked externally	2
argonauta argo	2
nerita peloronta	2
elongated canal	2
vertigo pusilla	2
family consists	2
half across	2
several days	2
original work	2
like pentelasmis	2
onward movement	2
columbella nitida	2
patella fissura	2
less extent	2
upper extremity	2
lip sharp	2
small umbilicus	2
containing descriptions	2
field geology	2
apex sub	2
two rapidly	2
principal parts	2
always smooth	2
many kinds	2
extremely beautiful	2
dolium maculatum	2
fifth order	2
flat striking	2
flattened disc	2
white shell	2
fossils found	2
pay particular	2
malacologie et	2
many shells	2
single species	2
neritina corona	2
strong resemblance	2
order cervicobranchiata	2
family answers	2
easily meet	2
side view	2
obliquely striated	2
will look	2
shells now	2
present advanced	2
last character	2
thin slabs	2
every ornithologist	2
columella oblique	2
besides brachiopods	2
many whorls	2
striated within	2
natica mamilla	2
among many	2
south kensington	2
loch carron	2
hyria corrugata	2
basal channel	2
placuna placenta	2
magnified dissections	2
seven valves	2
cave deposits	2
ear shaped	2
ciliated arms	2
little open	2
total length	2
equally elegant	2
saucer limpets	2
exclusively marine	2
pecten pusio	2
numerous slowly	2
sandy ground	2
half long	2
lepidopterous insects	2
transparent shell	2
side visitor	2
generally light	2
geologically speaking	2
simple form	2
saddle oyster	2
trifling cost	2
shells ft	2
pillar generally	2
blainville remarks	2
big river	2
trochus stellaris	2
surface pearly	2
moderate price	2
british sea	2
conical spires	2
large triangular	2
margin oblique	2
two principal	2
pretty shining	2
two sections	2
ligament spread	2
shell described	2
elegantly bound	2
mactra stultorum	2
dorsal plates	2
old name	2
long time	2
irregular distances	2
lamarckian genus	2
generally covered	2
widened apertures	2
margin opposite	2
venus cancellata	2
delicate white	2
beautiful plant	2
distinct midrib	2
fusus colus	2
closely allied	2
true limpets	2
arca antiquata	2
ciliated branchia	2
patella pellucida	2
order polythalamous	2
without folds	2
another family	2
margin denticulated	2
british strata	2
standing pools	2
sometimes forming	2
siphon close	2
easily made	2
emarginula fissura	2
small end	2
genus ancylus	2
genus spirifer	2
seen externally	2
pandora rostrata	2
principal portions	2
glassy shells	2
septa sinuous	2
either destitute	2
chalky districts	2
bulla lignaria	2
solid column	2
band passing	2
soldered together	2
beautiful objects	2
posterior slope	2
pointed spire	2
original genus	2
less completely	2
like nautilus	2
alexander wilson	2
pallial impression	2
lip dilated	2
three sub	2
pieces placed	2
equally fusiform	2
advanced state	2
species constitute	2
spire concealed	2
pale yellow	2
less depressed	2
shell called	2
slightly crenated	2
may appear	2
marginella glabella	2
two long	2
chambers divided	2
important additions	2
antique lamp	2
south brit	2
will contain	2
others enumerated	2
known shells	2
anterior cardinal	2
two individuals	2
shall pass	2
characteristic british	2
separate pieces	2
animal issues	2
ascending canal	2
rather gaping	2
british genera	2
narrow entrances	2
little foot	2
genera bulla	2
jointed plants	2
lamarck divides	2
genus rotalites	2
umbilicus filled	2
flat space	2
former world	2
pit containing	2
sometimes slightly	2
transparent appearance	2
much valued	2
one thick	2
valve patelliform	2
lately found	2
rocky coasts	2
general principles	2
pillar smooth	2
south africa	2
may often	2
lower oolites	2
narrowing towards	2
one large	2
family turbinacea	2
large oval	2
general shape	2
triton anus	2
valve large	2
choice specimen	2
natural polish	2
containing shells	2
bony substance	2
terebellum convolutum	2
closely coiled	2
greatly improved	2
class cirripedes	2
baron cuvier	2
striated longitudinally	2
valves fixed	2
achatina priamus	2
tubular opening	2
american seas	2
varices numerous	2
orthocerata belemnites	2
chiton fascicularis	2
separate nucleus	2
probably find	2
balea fragilis	2
hinge destitute	2
silky byssus	2
large byssus	2
many chambered	2
separated without	2
cyclas fontinalis	2
french naturalist	2
st family	2
central nucleus	2
spiral fold	2
taking place	2
variously marked	2
peduncle scaly	2
bulinus lyonetianus	2
testaceous tube	2
straight canal	2
whorls slightly	2
surface soil	2
first thing	2
study geology	2
genus eulima	2
yet appeared	2
bony process	2
dorsetshire coast	2
animal passes	2
septiform plate	2
till lately	2
hinnites pusio	2
marine plants	2
fossil bivalves	2
sonnenschein co	2
nearly equivalve	2
slightly prominent	2
several kinds	2
valves connate	2
numerous valves	2
pointed valves	2
depressed spires	2
several prominent	2
surface convex	2
lamarckian order	2
greatest size	2
shell together	2
see conchacea	2
magnificent work	2
glassy enamel	2
soft animals	2
nearly globular	2
will form	2
regular series	2
class conchifera	2
also contains	2
water bivalves	2
spiratella limacinea	2
british islands	2
william jardine	2
aperture rather	2
bulla fragilis	2
next process	2
apex solid	2
small testaceous	2
sometimes acute	2
pectunculus pilosus	2
internal bar	2
sometimes white	2
gaping posteriorly	2
parmophorus elongatus	2
limestone districts	2
double point	2
little slipper	2
acetic acid	2
coral rag	2
several pieces	2
distinct plaits	2
little fresh	2
lip flattened	2
pachymya gigas	2
pretty genus	2
popularly known	2
whose organs	2
genera tubicinella	2
side shortest	2
gradually tapering	2
word cone	2
principal forms	2
joseph rickerby	2
generally termed	2
three rows	2
destructive agencies	2
pure glycerine	2
internal canal	2
transverse folds	2
animals swim	2
marine animal	2
spire turrited	2
hundred guineas	2
several valves	2
information respecting	2
must pay	2
columella laminar	2
essential characters	2
always external	2
arca tortuosa	2
sandy places	2
new one	2
systematic indices	2
half bound	2
south co	2
imperial vo	2
order iii	2
shells alone	2
aperture elongated	2
arranged according	2
round form	2
margin rounded	2
cell division	2
two flat	2
aperture oblique	2
angular aperture	2
original drawings	2
fleshy peduncle	2
wide near	2
another kind	2
beautiful shell	2
suddenly contracted	2
genera established	2
case may	2
difference appears	2
helix octona	2
species also	2
vulsella lingulata	2
somewhat triangular	2
pholas papyracea	2
melanopsis costata	2
shelly tubes	2
numerous genera	2
external coating	2
posterior elevation	2
found adhering	2
shell pear	2
first containing	2
closed extremity	2
northern latitudes	2
shelly appendage	2
et de	2
lose sight	2
text emphasis	2
turbo tridens	2
fossil nautili	2
transverse grooves	2
original name	2
papillary spire	2
apex slightly	2
valve concave	2
now called	2
operculum composed	2
order sessile	2
often cast	2
dolabella rumphii	2
reflected outer	2
right lip	2
several handsome	2
one chamber	2
water snail	2
th family	2
hyria syrmatophora	2
father will	2
three kinds	2
two laminar	2
elongated valves	2
external portion	2
genera aplysia	2
deep triangular	2
testaceous covering	2
slowly increasing	2
somewhat dilated	2
gilt back	2
slightly spiral	2
northern expeditions	2
species run	2
little teeth	2
slightly beaked	2
probably belonging	2
every kind	2
first includes	2
genera belemnites	2
usually found	2
impression entire	2
melania subulata	2
right angles	2
charles lyell	2
remarkably light	2
class pteropoda	2
impressions sinuated	2
new names	2
genus pecten	2
new world	2
teeth two	2
two remote	2
captain sir	2
coarsely cancellated	2
margins entire	2
us take	2
much iron	2
curiously shaped	2
nearly half	2
transversely ovate	2
shells belong	2
sometimes placed	2
added pharetrium	2
sherbourn lane	2
often covered	2
sir john	2
mouthed turbo	2
nearly cylindrical	2
aspergillum vaginiferum	2
somewhat flattened	2
epidermis light	2
explanatory plates	2
turbinella spirillus	2
lateral siphon	2
general arrangement	2
formerly included	2
whorls angular	2
genus eburna	2
six valves	2
small size	2
obliquely conical	2
columella spiral	2
order annelides	2
interesting life	2
circular aperture	2
undulating line	2
locomotion consist	2
consequently two	2
peritreme continuous	2
tendinous tube	2
fine butterflies	2
mya truncata	2
placed perpendicularly	2
valves open	2
varies exceedingly	2
genus may	2
opposite case	2
horticultural society	2
ptilota plumosa	2
porous structure	2
little testaceous	2
nitric acid	2
valve cylindrical	2
like animal	2
partly hidden	2
bulinus rosaceus	2
leisure hours	2
del fuego	2
time covered	2
genus resembling	2
part analogous	2
finished appearance	2
transcriber notes	2
one turn	2
valves united	2
regular intervals	2
rather obtuse	2
pair elongated	2
subsequently deposited	2
spiral side	2
present undertaking	2
light horny	2
little white	2
chama arcinella	2
emarginula elongata	2
come next	2
hinge flat	2
transparent shells	2
minute shell	2
replied lucy	2
anterior fold	2
carinaria mediterranea	2
elementary acquaintance	2
terebratula psittacea	2
two sides	2
fauna boreali	2
one exception	2
truly british	2
parts may	2
delle chiaje	2
water molluscs	2
reddish brown	2
rock salt	2
petrified fingers	2
six hundred	2
simple cell	2
inches thick	2
magas pumilus	2
great deal	2
oblique plaits	2
genus strombus	2
type malentozoa	2
prominent umbones	2
include species	2
pointed posteriorly	2
ligament contained	2
atlanta helicialis	2
lip granulated	2
lip obsolete	2
placed behind	2
lutraria elliptica	2
forty feet	2
accurately engraved	2
inwards towards	2
rock specimens	2
small fossil	2
plate xxiv	2
former times	2
mentioned work	2
extended beyond	2
class iv	2
compressed towards	2
lamarckian system	2
umbones nearly	2
brown clay	2
cirrhipeda class	2
left hand	2
well acquainted	2
water deposits	2
one placed	2
large thick	2
first class	2
less ventricose	2
frequently used	2
coral reefs	2
soft state	2
microscopic bodies	2
margin sinuated	2
reaching half	2
smooth species	2
just inside	2
fusus contrarius	2
convolute shells	2
balanus montagui	2
two similar	2
land molluscs	2
carocolla lamarckii	2
shell known	2
perpendicular fibres	2
closed canal	2
anterior tooth	2
yet quite	2
entire palleal	2
trays may	2
fossil resembling	2
thin species	2
umbones prominent	2
names given	2
xylophaga dorsalis	2
inner side	2
without colour	2
nearly regular	2
spire papillary	2
ever appeared	2
fish teeth	2
new guinea	2
plates coloured	2
small hollow	2
european shores	2
margin smooth	2
numerous wood	2
cyprina islandica	2
distant lateral	2
next section	2
shelly limestones	2
modern nomenclature	2
concentrically striated	2
valve convex	2
whole slug	2
sometimes one	2
posteriorly contracted	2
imperceptible gradations	2
pulmonary cavity	2
staircase trochus	2
eburna zeylanica	2
secreting organ	2
two divisions	2
edges meet	2
sufficiently distinct	2
elevated points	2
fringed varices	2
conus virgo	2
genus achatina	2
triangular species	2
anterior hiatus	2
basal portion	2
extending along	2
found recent	2
colouring matter	2
grey limestone	2
angular bendings	2
order aporobranchiata	2
numerous modifications	2
large belemnite	2
shelly base	2
varices skirting	2
purpura persica	2
many places	2
probably belong	2
small patelliform	2
philosophic ornithologist	2
spire uncovered	2
one composed	2
prominent edge	2
beautiful sea	2
mouth generally	2
fine teeth	2
cardinal pit	2
prominent fulcra	2
good example	2
pair short	2
extreme point	2
named specimens	2
york street	2
extensive family	2
spire prominent	2
several cardinal	2
much thicker	2
sanguinolaria rosea	2
jupiter ammon	2
shells properly	2
called cardinal	2
one thing	2
like shells	2
illustrated monograph	2
sometimes separate	2
irregular grooves	2
shells besides	2
large angular	2
find plenty	2
general divisions	2
unequally fusiform	2
small round	2
obliquely oval	2
furcellaria fastigiata	2
ligament large	2
aperture semi	2
species mentioned	2
retired within	2
auricula lineata	2
conia porosa	2
arborescent septa	2
common sea	2
generally white	2
class paracephalophora	2
number corresponding	2
beautifully engraved	2
triangular foramen	2
natural manner	2
called valves	2
land snails	2
new series	2
threads spun	2
modern system	2
generally angulated	2
often nearly	2
red ink	2
scarcely one	2
strong folds	2
green morocco	2
grooved spirally	2
little known	2
mollusques terrestres	2
formerly called	2
geological systems	2
also forms	2
spire depressed	2
contain several	2
preceding one	2
genus buccinum	2
frequently met	2
solitary british	2
two ligaments	2
slight sinus	2
next order	2
northern hemisphere	2
hundred pounds	2
spire compressed	2
portland stone	2
cyclas amnica	2
whorls increasing	2
limpet tribe	2
exceedingly beautiful	2
purple colour	2
bulinus lubricus	2
cemented together	2
siphonida sinu	2
volcanic rocks	2
among collectors	2
spire pointed	2
oblong species	2
best way	2
shells sometimes	2
plants collected	2
central siphon	2
arranging specimens	2
little plant	2
clausilia macascarensis	2
curved towards	2
enlarged figure	2
rare genus	2
exogyra conica	2
deep slit	2
trigonal pit	2
several ways	2
sometimes straight	2
chiefly found	2
takes place	2
nineteen families	2
sir charles	2
two shells	2
now extinct	2
shining shells	2
scalpellum vulgare	2
thought advisable	2
delicate plants	2
almost sure	2
modern conchologists	2
almost always	2
deep brown	2
geographical distribution	2
fibres passing	2
short time	2
next time	2
different strata	2
horny without	2
moist places	2
containing several	2
genera vermetus	2
different forms	2
feet long	2
great depth	2
rather indistinct	2
fossils composing	2
merely accidental	2
little cap	2
scientific knowledge	2
whose single	2
long narrow	2
curving inwards	2
cassis tuberosa	2
barnacle duck	2
unknown genus	2
chambered cephalopoda	2
numerous chambers	2
lower oolite	2
british ornithology	2
operculum testaceous	2
aperture appears	2
last page	2
des sciences	2
leans towards	2
one generic	2
bright amber	2
animals enclose	2
entirely covered	2
proper place	2
conohelix marmorata	2
one impression	2
never pearly	2
contracted near	2
internal folds	2
whorl continuing	2
specimen taken	2
sharp points	2
common muscle	2
somewhat compressed	2
singular fossils	2
soon show	2
shell sub	2
lateral pair	2
yet known	2
clean water	2
lip marginated	2
somewhat effuse	2
valves divided	2
extremely light	2
always near	2
entirely hidden	2
groove near	2
three british	2
solen radiatus	2
vegetable matter	2
river valley	2
shell turriculated	2
parmacella calyculata	2
feet across	2
generally gaping	2
distinct muscular	2
thin outer	2
equal breadth	2
broad tooth	2
mounting paper	2
best time	2
anterior small	2
aperture without	2
sometimes applied	2
isocardia moltkiana	2
previously used	2
regular form	2
taken away	2
obliquely truncated	2
common octopus	2
land plants	2
almost unknown	2
many alterations	2
purpura patula	2
striated transversely	2
apex lateral	2
whorls separated	2
resembling auricula	2
simplest plan	2
muriatic acid	2
carefully removed	2
considerable thickness	2
either side	2
fanciful name	2
temperate climates	2
colour varies	2
double aperture	2
true mollusc	2
fine genus	2
small triangular	2
typical genus	2
eastern counties	2
larger umbilicus	2
moist soil	2
cardinal margin	2
eight principal	2
genera nobia	2
less rapidly	2
mostly flat	2
ribbed longitudinally	2
like drawings	2
fossil genera	2
deeper water	2
exceedingly brittle	2
hidden beneath	2
anatinella sibbaldii	2
murex tenuispina	2
exquisite work	2
columella internally	2
half way	2
shells found	2
amber colour	2
water marshes	2
last named	2
lips unite	2
shape according	2
two substances	2
genus phorus	2
base contracted	2
class ii	2
purely conchological	2
cardboard boxes	2
genus solen	2
published price	2
less rounded	2
living state	2
entirely composed	2
covent garden	2
pillar none	2
principal peculiarity	2
small land	2
terrestres et	2
siphonal tube	2
remarkable instance	2
front part	2
nebula var	2
genus fusus	2
posterior union	2
type malacozoaria	2
genus natica	2
spire elongated	2
edge straight	2
order iv	2
toothless hinge	2
incongruous species	2
flattened like	2
peritreme reflected	2
cartilaginous species	2
doubtful whether	2
columella slightly	2
chinese window	2
surface finely	2
nearly parallel	2
part near	2
interior surface	2
differs widely	2
three sections	2
columella rather	2
iron pyrites	2
recent ones	2
turned upwards	2
asiatic seas	2
avicula hirundo	2
siphonal inflexion	2
separate parts	2
animal juices	2
animal must	2
aperture semicircular	2
small aperture	2
fistulana clava	2
fairly abundant	2
either internal	2
less equilateral	2
et les	2
persian gulf	2
much compressed	2
accurate figures	2
elevated spires	2
either rounded	2
generally long	2
partly resembling	2
taking care	2
pyramidella terebellum	2
made use	2
genus avicula	2
generally symmetrical	2
spiral apex	2
ordinary garden	2
rather oval	2
zoological proceedings	2
hinge within	2
ornithological guide	2
iridescent within	2
forest marble	2
thrown away	2
like pholas	2
among bivalves	2
genus helicella	2
equally ribbed	2
finely polished	2
central europe	2
remote teeth	2
class annelides	2
several similar	2
shells occur	2
fine collection	2
testaceous productions	2
cardita calyculata	2
pearly shell	2
rhodomenia palmata	2
sometimes described	2
golden brown	2
lengthened aperture	2
known example	2
particular attention	2
spiral non	2
plate xxiii	2
des animaux	2
taken home	2
outer margin	2
secondary strata	2
termed ventral	2
late northern	2
lately brought	2
et fluviatiles	2
thick horny	2
sciences naturelles	2
finished drawings	2
better known	2
tentacula two	2
certain amount	2
sometimes reflected	2
without interruption	2
contains forty	2
shells resemble	2
required size	2
venus auct	2
flat dish	2
whorls overwrap	2
conus nussatella	2
first edition	2
far removed	2
drap marin	2
frequently seen	2
lower forms	2
look carefully	2
alasmodon complanatus	2
small marine	2
stiff dark	2
resemble trochus	2
blue clay	2
curved ridges	2
dead shell	2
strictest sense	2
sometimes smooth	2
true operculum	2
british shell	2
posterior hinge	2
pallets horny	2
genera discorbites	2
others nearly	2
clearly defined	2
formed part	2
northern ocean	2
large map	2
species included	2
conchological library	2
discoid shell	2
conilites pyramidatus	2
five species	2
thickened lip	2
short anterior	2
aperture linear	2
another remarkable	2
curved like	2
closely set	2
posteriorly angulated	2
every sea	2
size will	2
razor shells	2