OF WESTERN KORTH AMERICA. 



tJPPER OLiaOCENE— Continued. 



AilTI01>ACTYLA— Continued. 



DlCOTYLID^ (=TAGASSUn)^), 



Perchoerus robustus (Marsh) 1 X 



Perchoerus pristinus (Leidy) ' 



Perchoerus socialis (Marsh) | 



l'erch(jerus lentus (Marsh) 



Perchoerus subcBquans (Cope) ........ 



Perchoerus rostratus (Cope) 



Perchoerus trichsenus (Cope) 



? Perchoerus platyops (Cope) ! X 



Perchoerus osnionti (Sinclair) 



Chaenohyus decedens Cope .......... 



LEPTOCHCERIDyE. 



Leptochoerus sp. 



ANTHRACOTHERIID.E. 



Anthracotherium karense O. and W ! X I 



Plyopotamus (=Ancodon) biaehyrhynchus O. and W j x ! 



Arretotheriuni acridens Douglass 



Oreodontuk*: (= Agriochcerii).*:^. 



.\griochoerus major Leidy 



.Vgriochoerus gaudryi (O. and W.) 



Agriochoerus migrans (Marsh) 



Agriochoerus ferox (Cope) , 



Agriochoerus guyotianus (Cope) , 



.\griochoerus ryderanus (Cope) 



.\griochoerus macrocephalus (Cope) 



Agriochoerus trifrons (Cope) 



Eporeodon (?=Eucrotaphus) occidentalis (Marsh) 



Eporeodon (?=Eucrotaphus) leptacanthus (Cope) i 



Eporeodon (?=Eucrotaphus) pacificus (Cope) i 



Eporeodon (?=Eucrotaphus) trigonocephalus (Cope) ■ 



Eporeodon (?=Eucrotaphus) longifrons (Cope) i 



Eporeodon (?=Eucrotaphus) major (Leidy) : x 



Eporeodon (?=Eucrotaphus) cedrensis Matthew 



Eporeodon (?= Eucrotaphus) socialis Marsh 



Eucrotaphus jacksoni Leidy 



Promerycocho'rus superbus (Leidy) 



Promerycochoerus macrostegus (Cope) 



Promerycochoerus chelydra (Cope) 



Promerycochoerus leidyi (Bettany) 



Promerycochoerus minor Douglass i 



Leptauchenia sp | x 



Hypertraguliu.<^i<;. I 



Hypertragulus hesperius Hay 



Hypertragulus planiceps (Sinclair). 



Leptomeryx sp. div 



Leptomeryx transmontanus Dough 



Protoceras celer Marsh 



Protoceras comptus Marsh 



Protoceras nasutus Marsh 



Calops cristatus Marsh 



Galops consors Marsh 



CAMELID.E. 



Paratylopus sternbergi (Cope) 



Paratylopus cameloides (Wortman) 



Pseudolabis dakotensis Matthew 



Camelidse indet 



