V. S. GEOLOGICAL STJRVEY 



MONOGRAPH 55 PLATE CLXXVIII 



TYPE SKULL OF BRONTOTHERItJM CURTUM 

 Plate prepared under the direiftion of Professor Marsh. One-fourth natural size. (See p. S7S, also PI. Ca^XXIX.) Yale Mus. 12013, type 

 of Brmtotherium C'Titanops-) curtum Marsh, Colorado, Chadron formation, upper beds (Hatcher). This iUge is very near the 

 culmination of the BrorttotHerium phylum. The nasals are very short, the horns long and much flattened, the buccal expansions 

 of the zygomata enormous. The incisor alveoli are not preserved in this specimen. The cheek teeth conform to the Brontotherium 

 pattern already described. (See PI. CLXV) 



