PLATE cm 



Type Skull and Jaw of Brontops eobustus 



Plate prepared under the direction of Professor Marsh. One-fourth natural size. (See p. 494) 



Yale Mus. 12048, Dry Creek, 5 miles northeast of Chadron, Nebr. (J. B. Hatcher), Chadron formation, probably upper levels. 

 Posterior view of skuU and jaw, illustrating the great breadth of the skull, the deep fossae for the attachment of the heavy 

 neck muscles, and the transversely expanded condjde of the jaw. 



