DEC 5 1930 



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Paleontologieal Bulletin, No. 39. 



THE EXTINCT MAMMALIA 



OF THE 



VALLEY OF MEXICO. 



Read before the American Philosophical Society, May 16, 1884. 



ON THE 



STRUCTURE OF THE FEET IN TEE EXTINCT ARTIO- 

 DACTYLA OF NORTH AMERICA. 



Read before the American Philosophical Society, Aug. 15, 1884. 



FIFTH CONTRIBUTION TO THE 



Knowledge of the Fauna of the Permian Formation 



OF 



TEXAS and the INDIAN TERRITORY. 

 Read before the American Philosophical Society, Aug. 15, 1884. 



By Professor E, D. Cope. 



FOB S^XjIE] BY .A.. E. FOOTE, 

 1223 BELMONT AVENUE, 



PHILADELPHIA. 



