U. S. GEOLOGICAL SURVEY 



MONOGRAPH 55 PLATE LXXV 



SKULLS AND JAW OF DOLICHORHINUS 



<After E. S. Riggs; see pp. 405, 406, 417.) One-fourth natural sfce. A, Dolichorhinus superior, type (Field Mus. 

 12188), Uinta B 1. B, D. flumi-nalis, type (Field Mus. 1220S), "Amynodon sandftone, Uinta B" (level Uinta 

 B 2 of this monograph). C, D. langiceps (Field Mus. 12200), referred jaw 



