File:Image from page 147 of "Water reptiles of the past and present" (1914) (14750026386).jpg
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[edit]DescriptionImage from page 147 of "Water reptiles of the past and present" (1914) (14750026386).jpg |
English: 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. 64.—Life restoration of Pleurosaurus on the under side than above. The upper border of the tail wassurmounted by a broad crest, extending to its extremity, and com-posed of large, oval scales. The body doubtless was whollycovered with scales, though it is not probable that the caudalcrest continued along the back. The limbs begin to show an aquatic adaptation, though notvery pronounced. They are much shorter and smaller than arethose of land-crawling reptiles; and the bones of the second series,that is, the radius and ulna, tibia and fibula, are relatively short,the beginning of adaptation to water habits. It is very probablethat the feet were webbed, though the fifth digit, as usual, is shorterthan the fourth. Doubtless on land the creature moved about PROTOROSA URIA 13 7 in a serpentine way, for it could not have progressed very rapidlyby the aid of its legs alone. The hind legs are longer than thefront legs, and they were connected firmly with the body by meansof a sacrum. T
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Source | Image from page 147 of "Water reptiles of the past and present" (1914) |
Author | Internet Archive Book Images |
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