PLATE 29 



SKULL OF THE TYPE OF PLIOHIPPUS LEIDYANUS OSBORN. 

 One-half natural size. 



Am. Mus. 17224, type. This is the best preserved adult skull referable to the genus Pliohippus which has thus far 

 been, discovered of Lower Pliocene age. It was found by Harold J. Cook in the upper levels of the Snake Creek formation 

 in Sioux County, western Nebraska, during the winter of 1915-1916. The skull is obliquely crushed, and the drawings 

 reproduced in Plates 29, 30 represent a very careful restoration, by measurement of the opposite sides, of the normal 

 proportions of the skull, which belongs to a nearly adult female, about six years of age, the last grinding tooth, m 3 , 

 just coming into use. 



The remaining characters of the skull of this type are shown on Plate 30. 



280 



