282 Loomis — Wasatch and Wind River Primates. 



The species is marked by stout low teeth ; an external cin- 

 gulum on the lower molars ; the hypoconulid of molars 1 and 2 

 being small and close to the hypocone ; the last lower molar 

 being shortened and having but one cusp on the heel, the hypo- 

 conulid. 



Fig. 4. Pelycodus tutus Cope var., x 2. The last molar is restored, the 

 original being crushed. 



The species is close to P. frugivorus, but differs especially 

 in the larger size, and in the single cusp on the last lower 

 molar. The species is rather rare on Gray Bull River, only 

 four specimens being found. The last three lower molars 

 measure 18 mm in length and 4|™' n in width. 



Pelycodus jarrovii Cope. 

 See Final Rep. Surv. West of 100th Meridian, vol. iv, 1887, p. 137. 



This large species from New Mexico has not been found 

 elsewhere as yet. It is marked by a simple heel on the last 

 lower molar, on which is merely a wall without any cusps. 

 The hypoconulid of molars 1 and 2 is barely perceptible. 



The three lower molars measure 20 mm in length. 



Pelycodus angulatus Cope. 

 Last cit., p. 144. 



This is a dubious species founded on a single molar tooth 

 from New Mexico. 



Pelycodus nwiiensis Cope.* 



This is the only species of Pelycodus to carry over into the 

 Wind River, and is by Osborn considered a transition to the 

 Notharctus species. However, on account of its stocky build 

 it appears to the writer a typical Pelycodus. 



The species is marked by low stout teeth ; the third lower 

 molar having its heel elongated and carrying two cusps where 

 the hypoconulid is usually situated ; the hypoconulid of molars 

 1 and 2 being small and central in position ; and the paraconid 

 being weak. 



While the last lower molar resembles P. frugivorus, the 

 species is larger and chunkier, and has the hypoconulid placed 



* See Bull. U. S. Geol. Surv. Terri., vol. vi, 1881, p. 187. 



