File:Image from page 129 of "Water reptiles of the past and present" (1914) (14772688782).jpg
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[edit]DescriptionImage from page 129 of "Water reptiles of the past and present" (1914) (14772688782).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. 56.—Front paddle of Oph-thalmosaurus (after Andrews): h,humerus; r, radius; u, ulna; p,pisiform; re, radiale; int, inter-medium; tie, ulnare. r Fig. 57.—Front paddle of Mer-riamia, a Triassic ichthyosaur.(After Merriam.) Explanationsas in Fig. 56. And there was an increase in the ichthyosaurs, in some notonly of the number of digits in each limb, but in all of the numberof bones in each digit, a character found also in the unrelatedmosasaurs and plesiosaurs. This increase in finger and toe bones,or hyperphalangy as it is called, is one of the most peculiar of allthe adaptations to water life, changing the feet and hands fromthe ordinary walking type to the fish-like swimming type. Thebones beyond the humerus and femur in the ichthyosaurs were so ICHTHYOSAURIA no increased in number and so changed in form and relations thatthey bear little resemblance to the corresponding bones of otherreptiles. They are merely polygonal platelets of bone, articulatingon all sides and fitting
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Date | circa |
Source | Image from page 129 of "Water reptiles of the past and present" (1914) |
Author | Internet Archive Book Images |
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