Loomis — Wasatch and Wind Hive?' Primates. 281 



Pelycodus Cope. 



The genus is founded on P. jarrovii from the New Mexico 

 Wasatch, the type among others from that region having dis- 

 appeared. Specimens of the various species are abundant 

 throughout the Wasatch of the Big Horn basin and run up 

 into the Wind River, where they give place to the more special- 

 ized Notharctus. On Bridger Creek, Wyo., where a rich 

 pocket of Wind River was found, Notharctus specimens were 

 second in abundance to Hyposodus only. While several species 

 occurred, the smaller sorts were the more abundant. 



Pelycodus frugivorus Cope var. 



This, the smallest and most abundant of the Wasatch species, 

 was founded by Cope on a portion of a jaw from New Mexico ; 

 and, on account of the correspondence in size, the Big Horn 

 specimens have been associated with it. While the two faunas 

 closely resemble each other, and are doubtless closely related, 

 the northern species differ slightly from the southern ; for 

 which reason the writer has used the variety designation. In 

 this instance the last lower molar of the New Mexico form 

 has fewer cusps on the less developed heel, than does the Big 

 Horn. 



The species is characterized by low chunky teeth ; a moderate 

 external cingulum on the lower molars ; the last lower molar 

 having an elongated heel with three small cusps occupying 

 the position of the hypoconulid ; the hypoconulid of molars 2 

 and 3 being small and situated close to the hypocone. 



FlG. 3. Pelycodus frugivorus Cope, var, , x 2. 



In the position of the hypoconulid and development of the 

 cingulum, the species is closest to P. tutus • in the modifications 

 of the heel it is nearer P. nwiiensis. Specimens were collected 

 from all levels in the Wasatch on Gray Bull River and in the 

 Buffalo Basin. The last three lower molars measure very uni- 

 formly 15 mm in length and 4: mm in width. 



Pelycodus tutus Cope var. 



Like the foregoing, this species is based on a New Mexico 

 fragmentary mandible, which carried only the third and fourth 

 premolars and the first molar. Like the foregoing, the Big 

 Horn specimens vary, especially in the premolars, the third 

 premolar being simpler, and the fourth having the two princi- 

 pal cusps much closer together. 



