222 Bulletin American Museum of Natural History, [Vol. XIX, 



More complete material is needed before its place can be de- 

 finitely determined. 



Measurements. 



Upper molars, nii-j 1.7 mm. 



" premolar p4, longitudinal 4. transverse 5.2 mm. 



Lower teeth, P4_m2 16. 



Upper molar m' longitudinal 5.3 " 6.8 



" m= " 5-S " 7-3 



m3 " 6.2 " 7. 



? Limnenetes sp. 



A number of lower jaws and parts of jaws may be provision- 

 ally referred to this genus, although the characters of the 

 teeth are nearer to those of Bathygeiiys than to Oreodon; while 

 Mr. Douglas describes the teeth of Limnenetes as so like those 

 of Oreodon as not to need a separate description. The pre- 

 molars are narrower than those of Oreodon, the entoconid 

 ridge not separated from the deuteroconid on p^, and the 

 structure of P3 is intermediate between that of 0. ciilhertsoni 

 and Merychyus elegans, but more brachyodont than either. 

 The lower molars are intermediate between those of Proto- 

 reodon, with conical internal cusps, and those of Oreodon 

 with fully crescentic internal cusps. Heel of m^ narrow, as 

 in Proioreodon. 



There is more than one species, and may be more than one 

 genus, among these specimens, and it is inadvisable to at- 

 tempt to place them very definitely at present. 



HYPERTRAGULID^. 



Leptomeryx ? esulcatus Cope. 



The type of Cope's species is an upper molar, probably m\ 

 from the Titanotherium Beds of Swift Current Creek, Canada. 



We have a large number of parts of lower jaws and separate 

 upper teeth, which belong to one or more species of Lepto- 

 meryx a little larger than L. evansi, but variable in size. 

 These are referred provisionally to L. esulcatus, because it is 

 within the limits of size, comes from the same geological hori- 



