Identifier: naturalhistory07ameruoft (find matches)
Title: Natural history
Year: 1919 (1910s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

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e the waters of the Permianrivers and lakes, need not be taken very seriously. Although clumsy and awkward looking in comparison with themore highly developed carnivorous reptiles and mammals of laterperiods, the Xaosaurus was the most active and powerful predaceousanimal of its time. A suggestion of its fighting habits is conveyed in theinjury to one of the spines in this skeleton. This was broken and dis-placed during life, probably in some affray, and afterwards united by agrowth of false bone. Several other specimens in the collection bearmarks of injuries received during life. With this skeleton the Department of Fossil Vertebrates enters uponthe illustration of the fauna of the Age of Amphibians, which precededthe Age of Reptiles as that preceded the Age of Mammals in the historyof the earth. In the Hall of Fossil Mammals may be seen the rise anddevelopment of the various races of quadrupeds which to-day inhabitthe earth; while the Dinosaurs, in the Dinosaur Hall, and the Marine
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THE SKELETON OF NAOSAURUS Cope CollectionA great, flesh-eating lizard, eight feet long, (nun the Permian beds of Texas.Collected by Charles H. Sternberg. Mounted at the American Museum in 1906 by A. Hermann.

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