278 Loomis — Wasatch and Wind River Primates. 



Cheiromyoidea Gnawing forms like Cheiromys, 



Mycrosyops, etc. 

 Lemuroidea Lemurs 



C Arctopithecini 

 | Palaeopithecini 



f Adapidae 

 < j Cebidae 



J Neopithecini < Cercopitliecidae 

 ! J Simiidae 



[ [ Hominidae 



Primates I Anthropoidea 



I 



Anaptomorphus minimus sp. nov. 



The type consists of a portion of the right mandibular ramus, 

 containing molars 1 and 2, and a part of premolar 4, found in 

 the lower Wasatch at the foot of Tatman Mt., Wyoming. 



The teeth are wide and low with acute 

 cusps, the talonid being slightly larger 

 than the trigonid. The paraconid is dis- 

 tinct and stands close to the inner mar- 

 gin of the tooth. The protoconid is 

 connected with the paraconid by a long 

 \ low protolophid, and with the meta- 



■ffe»j^ conid by a comparatively high metalo- 

 "■ j phid. The hypoconid and entoconid 

 are of about equal size. ISTo hypoconulid 

 ^^^^^^^ is present. 

 Fig. 1. Anaptomorjjhus Specific characters are found in the 

 minimus, type, x 5. position and development of the para- 



conid, and the extreme small size of the animal. The two lower 

 molars measure together 3-4 mm in length and l*4 mm in width ; 

 the depth of the jaw under molar 2 is 3 # 2 mra . 



Anantomorphus homunculus Cope. 



For excellent figures and description of this species, see 

 Osborn, Bull. Amer. Mus. Nat. Hist., vol. xvi, p. 200, and 

 comparisons in the table on the following page. 



Anaptomorp>hus abbotti sp. nov. 



The type consists of a right mandibular ramus containing 

 premolars 3 and 4 and molars 1-3, found in the middle beds 

 of the Wind River formation on JBridger Creek, Wyoming. 

 The species is named for Mr. L. F. Abbot, to whose interest 

 much of the success of the expedition was due. 



The molar teeth are low with low cusps, but rise progres- 

 sively to the fourth premolar, which has a prominent crown. 

 All the teeth in the short jaw are compressed from front to 

 back, making them proportionally wide. A distinct cingulum 

 runs along the front and external side of each molar. On 



