596 THE BRIDGER EPOCH. 



The cuboid is a flat subtriangular bone with two unequal articular faces 

 below. 



Length Olj"! 



Width ^"■0 



Depth • ■■ -0^1 



Length of cuneiform (anteroposterior) 040- 



Depth of cuneiform 01^ 



The 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 tliat one described under E. pressicornis, and the olecranar 

 fossa is shallower. It belongs to a larger animal ; see 



Measurements of humerus. 



M. 



Transverse diameter distally (7.75 inches) 19* 



Transverse diameter, inner condyle 125 



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

 Bad Lands, on South Fork of Bitter Creek, Wyoming. 



BATHY0PSIS Cope. 



Amer. Naturalist, 1881, p. 75. Bull. U. S. Geol. Surv. Terrs., 1881, p. 194. 



The characters of this genus can only be given as seen in the mandi- 

 ble, the only part of the skeleton in my possession Dentition : I. H ; C. 

 1 ; Pm. 4 ; M. 3. Incisors, canine, and first premolar forming an uninter- 

 rupted series, which is separated by a diastema from the molar series. The 

 molar and premolar teeth are constructed on an identical pattern, present- 

 ing slight modifications from front to rear. This consists of an anterior 

 elevated transverse crest, and a posterior heel, with raised posterior border; 

 between these is situated on the external side an elevated cusp, which sends, 

 a low ridffe inward and forward. The inner extremity of the anterior crest 

 is cusp-like, and is accompanied by a second internal anterior cusp imme- 

 diately posterior to it. The mandibular ramus has great vertical depth, its- 

 inferior border being convex downward thi-oughout its entire length. Sym- 

 physis coossified. 



The above characters indicate a new genus of considerable interest. 

 Its form differs from that of the two genera where it is known, viz, Uinta- 

 therium and Loxolojihodoii, in the much greater development of the inferior 

 expansion. In Loxolophodon it has been shown by Messrs. Speir and 



