U. S. GEOLOGICAL SURVEY 



MONOGRAPH 55 PLATE LXXVI 



SKULLS OF DOLICHORHINUS, SIDE VIEW 



(After E. S. Riggs; see pp. 405, 405, 417.) One-fourth natural sije. A, Dolichorhinus superior, type (Field Mus. 

 12188). B, D. longiceps, referred epecimen (Field Mus. 12175), drawing reversed. C, D. fluminalis, type (Field 

 Mus. 12205) *^Amynodon sand^one," level Uinta B 2, drawing reversed 



