76 



SINCLAIR— ADDITIONS TO FAUNA OF 



[April 24, 



Creek, is found, but with this exception the bones seem to have 

 been introduced directly into the streams which transported the 

 Snake Creek gravel and, apparently, represent the fauna of the 

 immediate vicinity, as frail teeth and delicate skull and jaw processes 

 remain unbroken, suggesting that the bones have not been moved 

 far. As will be seen by an examination of the Whistle Creek 

 Quadrangle, our collecting localities are somewhat widely scattered 

 and may not all represent the deposits of a single stream, possibly 

 are not all strictly contemporaneous, but as our large collection from 

 locality loooC contains practically the same forms as are found in 

 the remaining less fossiliferous localities, there is every reason to 

 regard the fauna as a unit. So far as determined, the Snake Creek 

 beds have yielded the following association of forms, those marked 

 (A) being preserved in the American Museum, New York, (P) in 

 the Geological Museum of Princeton University and (C) in the 

 private collection of Mr. H. J. Cook, of Agate, Nebraska. 



Dogs. 



Amphicyon amnicola {A). 

 Amphicyon sp. indet. {A). 

 ? Amphicyon sp. indesc. {P). 

 Aelurodon haydeni validus (A). 

 Aelurodon saevus secundus (A). 

 Aelurodon cf. wheelerianus (P). 

 Aelurodon sp. div. indet. {A, P). 

 Tephrocyon hippophagus (A, P). 

 Tephrocyon cf. temerarius {A). 

 Tephrocyon cf. vafer {A, P). 

 Tephrocyon mortifer (C). 

 Tephrocyon sp. tnaj. (A, P). 

 fCyon sp. (A). 



Civet-cat. 

 Bassariscus antiquus (A). 



Mustelines. 



Brachypsalis pachycephalus (P). 

 Brachypsalis obliquidens s-p.noY. (P). 

 Marfes glarece sp. nov. (P). 



Cats. 



Pseudcclurus near intrepidus (P). 

 Cat, non-machaerodont (P). 



Machserodont cat, gen. indet. (A). 

 fFelis cf. maxima {A). 



Rodents. 



Mylagaulus cf. monodon (A). 

 Dipoides curtus (A, P). 

 Dipoides tortus (A). 

 Hystricops cf. venustus (A, Pf). 

 Geomys cf. bisulcatus (A). 



Edentates. 



Megalonychid, gen. et. sp. indet. (A, 

 P). 



Rhinoceroses. 



Teleoceras sp. {A, P). 

 Aphelops sp. {A, P). 

 fCcenopus sp. {A). 



Horses. 



Archceohippus sp. (P). 

 Parahippus cf. cognatus (A, P). 

 Hypohippus cf. affinis {A). 

 Hypohippus sp. (P). 

 Merychippus cf. insignis (A, P). 

 Merychippus close to calimarius (P) , 

 Hipparion cf. occidentale {A, P). 



