PLATE CLXXV 



Skull of Brontotheritjm gigas elatus 



Plate prepared under the direction of Professor Marsh. One-fourth natural size. (See p. 570) 



Skull referred to Bronlotherium gigas (Yale Mus. 12061; type of Titanops elatus Marsh), South Dakota, Chadron formation, probably 

 upper levels. The skuU is a little crushed downward in front. Marsh did not recognize the generic relationship of this animal 

 ■with liis Bronlotherium gigas type jaw, and therefore he established for it the new genus Titanops. In 1902 Osborn referred 

 this skuU and jaw to Bronlotherium gigas, the type of which belonged to a somewhat younger animal. The present jaw is a 

 little larger than the type B. gigas jaw, but this may possibly be due to greater age rather than to specific differences. 



