PLATE CLXXIX 



Type Skull of Beontotherium cuetum 



Plate prepared under the direction of Professor Marsh. One-fourth natural size. (See p. 575, also PL CLXXVIII) 



Yale Mus. 12013, type of Brontotherium {"Titanops") curium Marsh, Colorado, Chadron formation, upper beds (Hatcher). A], 

 Side view. This shows the marked flattening and forward position of the horns, the shortness of the nasals, the high narial 

 incisure, and the massive zygomata. A2, Front view of horns. It is possible that this species is the same as the Brontotherium 

 platyceras of Osborn; if so the name platyceras would have priority over curtum. (See PI. CLXXXI.) 



