AUG 



PROCEEDINGS 



OF THE 



AMERICAN PHILOSOPHICAL SOCIETY 



HELD AT PHILADELPHIA 

 FOR PROMOTING USEFUL KNOWLEDGE 



Vol. LIV May-July, 1915 No. 217 



ADDITIONS TO THE FAUNA OF THE LOWER PLIOCENE 



SNAKE CREEK BEDS (RESULTS OF THE PRINCETON 



UNIVERSITY 1914 EXPEDITION TO NEBRASKA). 



By WILLIAM J. SINCLAIR. 

 (Read April 24, 1915.) 



One of the objects of the Princeton University 1914 Geologicc. 

 Expedition to Nebraska was to acquire, if possible, fossil bone?, 

 from the Lower Pliocene Snake Creek beds of Sioux County, partly 

 to fill out the exhibition and study collections of the Department of 

 Geology, which were lacking in PHocene vertebrates, and, partly, 

 to obtain some additional light on the fauna of the Great Plains 

 region in Lower Pliocene time, with the purpose of establishing a 

 broader basis for the correlation of Continental Interior and Pacific 

 Coast Tertiary deposits. In both respects the expedition was thor- 

 oughly successful, which I attribute, in large part, to the enthusiastic 

 support of my assistants, Messrs. A. C. Whitford, of Lincoln, 

 Nebraska, and Mr. Charles Earner, of Agate, and to the kindness 

 of our temporary neighbors, the various ranchmen on whose ranges 

 the bonebearing deposits lie. 



The Snake Creek beds were named and described by Matthew 

 and Cook/ and reference should be made to their paper for details 

 not brought out in the pages which follow. The four exposures 

 worked by the Princeton party lie within the limits of the Whistle 



1 " A Pliocene Fauna from Western Nebraska," Bull. Am. Mus. Nat., 

 Hist., N. Y., Vol. XXVI., Art. XXVIL, pp. 361-414, 1909. 



PROC. AMER. PHIL. SOC, LIV,, 217, F, PRINTED JULY 7, IQIS- 



