OF WESTERN NORTH AMERICA. Ill 



Range of Olig-ocene genera — Continued. 





Lower. 



Middle. 



Upper. 



White 

 River. 



John 

 Day. 



PERIS so DACTYL A. 



TI A 4-- A 











Hy racodon 



1 



i 



A 



X 







X 









1 



2 



1 



3 







2 



4 



2 



















1 



5 







1 



2 



1 









11 1 4 



3 



3 



4 



3 

 1 





Anchitherium 





Chalicotheriidae 











? 





3 











4 

 12 

 3 

 8 









ARTIOD ACTYLiA, 





1 



4 



3 



5 







X 



2 



3 



8 

 1 















1 



2 

 4 



1 











X 



1 



1 

 1 



1 

 1 

 1 







Oreodontid86 









1 



3 

 2 



6 



1 



0 



5 



















1 

 2 



1 



3 





2 







2 

 2 



1 





1 



2 







3 

 2 





Galops 







Hypertragulus 





1 



1 



Hypisodus 







Camelidae 





? Leptotragulus 



1 



1 



3 





2 



Paratylopus 



Poebrotherium 





1 



Pseudolabis 











a Including ^i/op5. 

 Including Pelonax. Dxodon, and Bodchcerus. 



