OF WESTERN NORTH AMERICA. 

 Range of Eocene genera — Continued. 



101 



Basal. 



Lower. 



Middle. 



First 

 phase. 



CAENTVORA (CEEODONTA)— cont'd. 



Hyaenodontidae (Proviverrinacj 



Sinopa. 



Tritemnodon 



Mesonychidae 



Dissacus 



Pachyaena 



Mesonyx 



Synoplotherium 



Harpagolestes 



Hapalodectes 



Triisodontidae 



Triisodon 



Sarcothraustes 



Goniacodon 



Microclaenodon 



Oxyclaenidae 



Oxjx'laenus 



Pr6tochriacus= Loxolophus. 



Carcinodon 



Paradoxodon 



Chriacus 



Tricentes 



Deltatherium 



Second 

 phase. 



First 

 phase. 



Second [ First Second 

 phase, phase, j phase. 



INSECTIVORA. 



Pantolestldae 



Pentacodon . . . 



Palaeosinopa.. . 



Pantolestes 



Hyopsodontidae. . , 



Mioclaenus 



?Protoselene. . 



Hyopsodus 



Leptictidae 



Palaeictops 



*Antiacodon 



Passalacodon. 



Anisacodon 



Gen. indesc 



ApatemyidEe 



Apatemys 



Gen. indesc 



Gen. indesc 



?Talpidae 



Talpavus 



Nyctitherium . 



Nyctilestes 



Gen. indesc 



Gen. indesc. .. 



Gen. indesc . . . 



Gen. indesc . . . 



Entomacodon. 

 ?Centetid8e 



Centetodon... 



Centracodon. . 

 Mixodectidae 



Mixodectes . . . 



Indrodon 



Olbodotes 



Incertae sedis 



Oxyacodon. .. 



Diacodon 



Didelphodus. . 



TILLODOXTIA. 



?Anchippodontidae . 



Esthonyx 



Trogosus 



Tillotherium 



RODEXTIA. 



Ischyromyidae 



Paramys 



Pseudotomus. 



Sciuravus 



Colonomys. . . 



Taxymys 



Tillomys 



?Geoniyidae 



Protoptychus . 



Upper. 



First 

 phase. 



Second 

 phase. 



? 3 



1 1 



X 



