id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
37350	Eaton, Theodore H. (Theodore Hildreth)	The Ancestry of Modern Amphibia: A Review of the Evidence			.txt	text/plain	7792	595	61	The skull in both orders has lost a number of primitive dermal bones in the separation of that order from any possible common stem with Urodela, vertebrae to relate a particular modern order (for example, Urodela) to limbs of salamanders show patterns of cartilage elements that he would either salamanders or frogs, but a reduction of the stapes comparable to Development of the vertebrae and ribs of Recent Amphibia has been The centrum in Anura (Fig. 5) is formed in the perichordal sheath Ribs, present as separate cartilages associated with the 2nd, hypochord shown in MacBride's diagram (Fig. 5, upper right) of a frog In Urodela (Fig. 6) the pattern of vertebral and rib development is more development seems to be separate from both the vertebra and the rib, and reduction of the rib-bearer in other tetrapods (frogs and amniotes) the evidence of ventral, rather than dorsal, ribs in early Amphibia, and	./cache/37350.txt	./txt/37350.txt