114 



CENOZOIC MAMMAL HOEIZONS 



' ' Poebrotherium sp." 



Stenomylus gracilis Peter- 

 son 



LOWER MIOCENE— Continued. 

 ARTIODACTYIiA— Continued. 

 Camelid^. 

 1. 2. 3. 4. 5. 



Syndyoceras cooki Barbour. 

 Hypertragulus ordi n a t u s 



Matthew 



Hypertragulus ' 'calcaratus 



Cope" 



X 



Protomeryx halli Leidy 



Protomeryx ? cedrensis Mat- 

 thew 



Protomeryx sp. div 



Oxydactylus longipes Peterson . 



Oxydaetylus brachyceps Peter- 

 son 



Hypertragulid^. 





X 









X 







X 





ANTILOCAPRID^ (MERYCODONTINiE). 



Blastomeryx advena Matthew. 

 Blastomeryx sp 



1. 



2. 



3. 







X 





X 









X 





X 







X 





MIDDLE MIOCENE. 



Deep River sequence. 

 Ticholeptus zone. 



1. Deep River (Smith River) , Montana. 



2. Pawnee Creek, northeastern Colorado. 



3. Flint Creek, Montana; ? North Boulder Creek, Montana, etc. 



4. Mascall, Oregon. 



1. 



CARNIVORA. 



Canid^. 



Tephrocyon rures^ris Merriam. 

 Cynarctus saxatilis Matthew. . . 

 Amphicyon sinapius Matthew. . 



"Canis" anceps Scott 



'Canis" cf. temerarius Leidy.. . 



"Canis" sp 



Tomarctus brevirostris Cope. . . 



?Cyon aut Icticyon sp 



??.\elurodon brachygnathus 

 Douglass 



MUSTELIDiE. 



Mustela parviloba Cope 



Mustela ogygia Matthew 



Potamotherium lycopotami- 

 cum Cope 



Felid^. 

 Pseudaelurus ?intrepidus Leidy. 



INSECTIVORA. 



Talpid^. 

 Talpa platybrachys Douglass . . 



RODENTIA. 



SCIURID^. 



Sciurus sp 



2_ 



3. 



4. 







X 



X 







X 







X 







X 







X 







X 









X 





X 







X 











X 



X 









X 







X 





ROD ENTI A— Continued. 

 Mylagaulid^. 



Mylagaulus Isevis Matthew 

 Mylagaulus paniensis Matthew . 



Mesogaulus ballensis Riggs 



Ceratogaulus rhinocerus Mat 

 thew 



Geomyid^. 

 Geomys sp.a 



EDENTATA. 



? Megalonychid^. 

 Gen. innom. Sinclair 



PROBOSCIDEA. 



Elephantid^. 



Trilophodon (=Gomphotheri- 

 um) proavus (Cope) , 



Trilophodon (=Gomphotheri- 

 um) breviceps (Cope) 



PERISSODACTYLA. 



Rhinocerotid^. 



Caenopus persistens Osbom 



Aphelops megalodus Cope 



Aphelops profectus (Matthew) . . 



Aphelops planiceps Osbom 



? Aphelops oregonensis (Marsh) . 



? Aphelops sp : . . 



Teleoceras medicomutus Os- 

 bom 



1. 



2. 



3. 





X 







X 





X 









X 







X 





X 









X 







X 







X 







X 









X 





X 





a Blue Creek, Nebraska, associated with Cyclopidius. 



