PLATE CXXXVII 



Skull of Menodus giganteus 



Plate prepared under the direction of Professor Marsh. One-fourth natural size. Side view. (See pp. 523, 532) 



Type of "Brontotherhim ingens" Marsh (Yale Mus. 12010), Colorado, Chadron formation. This fine skull, which Marsh erroneously 

 referred to Broniotherium, possesses aU the distinctive characters of Menodus, among which may be noted the following: Skull 

 dolichocephalic, with slight zj'gomatic expansion and narrow parietal vertex; horns divergent, trihedral in basal section, con- 

 necting cr&st at back of horns; nasals elongate, wide distally; cheek teeth with sharp external cingula. 



