9^ Bulletin American Museum of Natural History. [Vol. XVI, 



collected and recorded by Hatcher. One of these skulls was 

 provisionally referred by him to Teleodus avus, from which 

 this species is quite distinct. 



MIDDLE BEDS. 



Megacerops dispar Marsh (Syn., Brontops validiis Marsh). 

 — Represented by the type, No. 4941, U. S. Nat. Mus., and 

 numerous fine male and female skulls in the National Mu- 

 seum, collected and accurately recorded as to level b}^ 



Fig. 4. Megacerops brachycef^halus. K\5 . S. Nat. Mus. No. 4258, Sk. F.) Not the tj'pe. 

 This skull was figured by Marsh (Amer. Jour. Sci., Oct., 1887) as Brontops disfiar. X i. 



Hatcher. The incisors vary from two to one. Canines 

 prominent, pointed. Premolars, |~, with internal cones 

 more distinct than in M. brachycephalus. Nasals shorter; 

 horns longer, broader in section at the base; zygomata 

 more expanded. 



