File:Image from page 33 of "Water reptiles of the past and present" (1914) (14586262480).jpg
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DescriptionImage from page 33 of "Water reptiles of the past and present" (1914) (14586262480).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. 6.—Labidosaurus, a cotylosaur.Skull from above: pm, premaxilla; n,nasal; m, maxilla; /, lacrimal; p, pre-frontal; fr, frontal; pf, postfrontal;po, postorbital; j, jiigal; pa, parietal;sq, squamosal; ds, dermosupraoccipi-tal; pf, parietal foramen. THE SKELETON OF REPTILES 23 doubtless greater brain power have rendered unnecessary or uselesstrie older kinds, just as modern methods and modern arms haverendered useless the coat of mail of the Middle Ages. The old reptiles had a continuous covering or roof for the skull,pierced only by the openings for the nostrils in front—the nares—the orbits for the eyes near the middle, and a smaller median open-ing back of them for the so-called pineal eye. The temporalregion, that is, the region back of the orbits on each side, wascompletely roofed over by bone for the support and protection ofthe jaw muscles. In later reptiles this region has been lightened.
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Source | Image from page 33 of "Water reptiles of the past and present" (1914) |
Author | Internet Archive Book Images |
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31 August 2015
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