. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Fig. 107.—Cakpus of A, Hatteria {Sphenodon) ^ji/Kctoto, axd B, EmyJura hrefftii. (After Baur.) i?, radius ; U, ulna ; r, radiale; ii, ulnare; i, intermedium ; c^, radial oentrale; C-, ulnar eentrale ; 1-5, carpalia ; p, ulnar sesamoid (pisiform); I-V, the metacarpals. the latter. The eentrale, as in Anura, comes to be situated in the distal row, which is much less developed than the proximal. In all Reptiles the tarsus undergoes a marked reduction, especially in its proximal portion, and gradually leads to the type see
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Fig. 107.—Cakpus of A, Hatteria {Sphenodon) ^ji/Kctoto, axd B, EmyJura hrefftii. (After Baur.) i?, radius ; U, ulna ; r, radiale; ii, ulnare; i, intermedium ; c^, radial oentrale; C-, ulnar eentrale ; 1-5, carpalia ; p, ulnar sesamoid (pisiform); I-V, the metacarpals. the latter. The eentrale, as in Anura, comes to be situated in the distal row, which is much less developed than the proximal. In all Reptiles the tarsus undergoes a marked reduction, especially in its proximal portion, and gradually leads to the type seen in Birds. Thus in Chelonians and Lizards the proximal tarsals all run together into a single mass which corresponds to the tiblale, intermedium, fibulare, and eentrale, and the last mentioned element can no longer be recognised in Lizards, even in the embryo. Traces of an extra radial ray are present. In the distal row three or four (five in Paljeohatteria) separate tarsals are developed, but these may unite partly Avith one another ' In Hatteria and Clielydra .serpentina amongst existing Reptiles, a double eentrale is present in the carpus, and traces of a. double condition of this element are seen in certain other 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 Wiedersheim, Robert, 1848-1923; Parker, William Newton, 1857-1923. London, Macmillan
Size: 1418px × 1761px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
