File:Image from page 245 of "Water reptiles of the past and present" (1914) (14772774472).jpg
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[edit]DescriptionImage from page 245 of "Water reptiles of the past and present" (1914) (14772774472).jpg |
Identifier: waterreptilesofp1914will Title: Water reptiles of the past and present Year: 1914 (1910s) Authors: Williston, Samuel Wendell, 1851-1918 Subjects: Aquatic reptiles Publisher: Chicago, Ill., The University of Chicago Press Contributing Library: Boston Public Library Digitizing Sponsor: Boston Public Library
Click here to view book online to see this illustration in context in a browseable online version of this book.
Text Appearing After Image: Fig. 123.—Archelon ischyros; skeleton from above: n, nuchal, r, r, r, ribs; m,m,peripheral bones; h, humerus; r, radius; u, ulna; t, tibia; fi, fibula. (From Wieland.) About a half-dozen species and two genera of the family haveso far been described, all coming from the Upper Cretaceousdeposit of Kansas and South Dakota, the genus Archelon from laterrocks than those which have yielded Protostega. The general form and structure of Archelon will best be under-stood from the accompanying figures after Wieland (Figs. 123,124, 125) and the restoration of the living animal as interpretedby the writer (Fig. 126). If the leather-back turtle, described CHELONIA 235 farther on, is really the descendant of these or allied turtles, as many-authors believe, it of course represents the very highest aquaticspecialization of all Chelonians. If, on the other hand, as somebelieve, the leather-back is the end of a long and independent lineof descent, then Archelon represents the highest aquatic specia
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Source | Image from page 245 of "Water reptiles of the past and present" (1914) |
Author | Internet Archive Book Images |
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