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New Reptiles and Stegocephalians from the Upper Triassic of Western Texas

By E. C. Case
Paperback
$6.99
By E. C. Case
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From the INTRODUCTION. By aid of grants from the Carnegie Institution of Washington, the author has been for a number of years continuously at work upon the investigation of the vertebrate fauna of the Permo-Carboniferous beds of North America. The sudden and complete disappearance of this fauna (followed, after an interval represented by barren beds, by a highly specialized Upper Triassic fauna) has always been a tantalizing problem-the more so as the barren beds between the two widely dif...

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