192 



University of California Publications. [Geology 



The type of Miolabis (Paratylopus) sternbergi is stated by 

 "Wortman to be "from the lower beds of the John Day Valley." 

 (=Dieeratherium beds of Wortman). The matrix investing the 

 skull is, however, quite unlike the Middle John Day tuffs, and 

 resembles the uppermost part of the Upper John Day in which 

 camel remains are particularly abundant. For the present it is 

 omitted from the faunal list of either horizon. 



Combining the various partial lists of Upper John Day 

 species, the following forms may be regarded as characteristic 

 of this division : 



Nothocyon lemur (Cope). 



Temnocyon altigenis Cope. 



Temnocyon ferox Eyerman. 



Mesocyon coryphaeus (Cope). 



Mesocyon brachyops Merriam, J. C. 



Pogonodon davisi Merriam, J. C. 



Entoptychus planifrons Cope. 



Entoptychus cavifrons, Cope. 



Entoptychus rostratus Sinclair. 



Entoptychus sperryi Sinclair. 



Lepus ennisianus Cope. 



Mylagaulodon angulatus Sinclair. 



Rhinoceros. 



Mesohippua equiceps (Cope). 

 Mesohippus acutidens Sinclair. 

 Mesohippus praestans (Cope). 

 Protapirus robustus Sinclair. 

 P rota pints sp. 



Elotheriwm calhinsi Sinclair. 

 Elotherium sp. 

 Agrioehoerus ferox (Cope). 

 E poreodon sp. 



Eporeodon irigonoeephalus (Cope). 

 Eporeodon major longifrcns (Cope). 

 Promerycochoerus superbus (Cope). 

 Promerycochoerus chelydra (Cope). 

 Promerycochoerus macrostegus (Cope). 

 Promerycochoerus leidyi (Bettany). 

 Hypertragvlus sp. 



lliolabis (Paratylopus) cameloides (Wortman). 

 Stylemys sp. 



Promerycochoerus is the most common form in the Upper 

 John Day, and is not known from the middle division. Its ab- 

 sence from the middle division affords an important means of 

 discriminating the horizons in the field. Like Promerycochoerus. 



