Cope.] ui [ Feb 21, 



its only anterior articulation is with the cuboid and is small. The heel is 

 deeper than long and is obliquely truncate downwards and inwards. 



Measurements of Calcaneum. 



M. 



Length 0.105 



Width 092 



Depth in front 056 



Length heel 047 



Depth " 055 



Length cuboid facet 038 



The cuboid is a flat sub-triangular bone with two unequal articular 

 faces below. 



M. 



Length 064 



Width 076 



Depth 031 



Length cuneiform (antero-posterior) 040 



Depth " 017 



A humerus of a third specimen may or may not belong to this species. 

 It was found in another locality. Its condyles are much less oblique than 

 in that one described under E. pressicornis. It belonged to a larger 

 animal, see 



Measurements of Humerus. 



M. 



Transverse diameter distally (7.75 in.) 195 



" " inner condyle 125 



The olecranar fossa is shallower. 



Remarks. — The remains were discovered by the writer in the Bridger 

 Bad Lands on South Fork of Bitter Creek, Wyoming. 



UlXTATHERIUM ROBUSTUSI. Leidy. 



Proceedings Academy Natural Sciences, Philadelphia, 1872, p. 169, 

 August. Uintiiiiii/xti.r utrox, Leidy, 1. c. (? ?) Titanotherium anceps, Marsh, 

 American Journ. Sci. Arts, 1871, p. 35. 



I have been able to examine, through the kindness of Prof. Leidy, the 

 type of his description, and find it to belong to a smaller species than any 

 of those above described. The lateral parietal and supra-occipital crests 

 are well developed, and the latter extends obliquely backwards. Several 

 peculiarities are to be observed in the dentition. Thus there is great in- 

 equality in the height of the transverse crests of the posterior upper 

 molar, the anterior, or the arched one, rising to a high cusp at its outer 

 extremity. A small tubercle exists on the side of the inner angle of the 

 grinding surface in the penultimate molar. The same angle is much 

 elevated in an anterior molar. The canine is wider distally than in L. 



