. The biology of the amphibia. Amphibians. 228 THE BIOLOGY OF THE AMPHIBIA ventral side may fuse with its mate of the opposite to form a moon-shaped element which, unfortunately for the sake of. c Fig. 85.—Three types of vertebrae characteristic of extinct orders of Amphibia, viewed from the left side. These types also represent stages in the progressive reduction of ossification in phylogeny: A. Cricotus, an embolomerous labyrin- thodont. B. Eryops, a rachitomous labyrinthodont. C. Branchiosaurus, with epichordal vertebrae. (After Whittard.) , intercentrum; , neural arch; Not., notoch
. The biology of the amphibia. Amphibians. 228 THE BIOLOGY OF THE AMPHIBIA ventral side may fuse with its mate of the opposite to form a moon-shaped element which, unfortunately for the sake of. c Fig. 85.—Three types of vertebrae characteristic of extinct orders of Amphibia, viewed from the left side. These types also represent stages in the progressive reduction of ossification in phylogeny: A. Cricotus, an embolomerous labyrin- thodont. B. Eryops, a rachitomous labyrinthodont. C. Branchiosaurus, with epichordal vertebrae. (After Whittard.) , intercentrum; , neural arch; Not., notochord; , pleurocentrum; R., rib. clarity, is called an "intercentrum.'' The interventrals, which ossify free of the other elements, are called u pleurocentra,". Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Noble, Gladwyn Kingsley, 1894-1940. New York : McGraw-Hill
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