34 Bulletin American Miiseiun of Natural History. [Vol. XII, 



III. Wasatch. — Continued. 



TAPIRID^. 



Systemodon protapirinus Wortman 



Systemodoii privicevus Wortman 



" semihians Cope 



ARTIODACTYLA. 



HOMACODONTID.^. 



Trigonolestes chacensis Cope.^ . . . 

 Trigonotesti's hrachysloniiis Cope 



" nuptus Cope. 



" metsiacns Cope 



" etsagicus Cope 



ACH^ENODONTID^. 



Parahytis vagus Marsh 



aberrans Marsh 





A. M. 



U. S. 

 A. M. 



IV. WIND RIVER. 



All the types and described specimens are in the American 

 Museum of Natural History. 



PRIMATES. 



Hyopsodus paulus Leidy 



" vicarius Cope 



Hyopsodus ? letnoinianus Cope . . . 



" ? powellianus Cope.... 



Pelvcodus tutus Cope 



Peiycodus frugivorus Cope 



Pelycodus niinienus Cope 



Microsyops gracilis Leidy 



Microsyops scott!anusCo\)t '' 



^^ 



Mo 



o a. 



A. M. 

 A. M. 



' This is the common species of Trigonolestes. The others are founded on somewhat smaller 

 or otherwise different individuals, but all very closely allied except 7". etsagicus, which differs 

 widely and may have to be separated generically, as Wortman has suggested ( Extinct Camelidse 

 of North America, Bull. Am. Mus. Nat. Hist., 189S, p. loi, foot-note). I have seen no 

 specimen of Trigonolestes proper (our collection contains 26) in which the paraconid is not 

 present and twined with the metaconid in a peculiar way. 



- Doubtfully distinguishable from J\I. gracilis. 



