3 2 Department of Vertebrate Palceontology. 



female was hornless. This skeleton is that of a female, and 

 is mounted in high relief. 



Marsh, Am. Journ. Sci., 1891, Jan., p. 81; 1893, Nov., p. 407; 1897, 



Sept., p. 165. 

 OsBORN & WoRTMAN, Characters of Protoceras, Bull. Am. Mus. Nat. 



Hist., IV, 1892, p. 351. 

 Scott, Osteology and Relations of Protoceras, Joiir. Morph., XI, p. 



303- 



16. Oxyaena lupina Cope. 



Am. Mus No. 107. 

 Lower Eocene (Wasatch), Big Horn Valley, Wyoming. 



Oxy<sna was a typical Creodont or Primitive Carnivore. 

 Large head, with small brain and long, powerful jaws, short, 

 bandy legs, short, subplantigrade feet, and long tail, are the 

 most marked primitive characters. 



This skeleton was pieced together with great labor out of 

 two fragmentary specimens, one found by Dr. Wortman in 

 1 88 1 and described by Cope in ' Tertiary Vertebrata ' (Speci- 

 men No. 2), the other found in 1891 and described by Osborn 

 and Wortman in the American Museum Bulletin for 1892. On 

 comparing these two specimens it was found that they be- 

 longed to the same individual, and that the skeleton was 

 nearly complete, though broken into innumerable fragments. 

 The skeleton is mounted in full relief, every bone being re- 

 movable. 



Wortman, Restoration of Oxycsna lupina Cope, etc.. Bull. Am. Mus. 

 Nat. Hist., XII, 1899, P- 139- 



17. Equus scotti Gidley. 

 17a. Equus scotti and Protorohippus venticolus. 



Am. Mus. No. 106 12. 

 Pleistocene, Rock Creek, Llano Estacado, Texas. 



This skeleton is one of eight found together by J. W. Gidley 

 of the American Museum Expedition of 1899. It shows as 



