108 



M. R. Thorpe — John Day Eporeodons 



rounding at the base as in other species. This may or 

 may not be a specific character. 



/2^2^, TYPE 

 Y. P. M. 



Fig. 11. — Oreodontoides oregonensis, subgen. et sp. nov. Holotype. Eight 

 lateral view. X 2/3. 



Great size of brain chamber, lack of any sagittal crest, 

 unnsual diameter of postorbital constriction, and a 

 marked tendency toward brachycephaly are the most 

 marked characteristics of this form. 



Fig. 12 



/2329, TYPE 

 Y. P. At 



Fig. 13 



/2)29, TYPE 

 Y. P. M, 



Fig. 12. — Oreodontoides oregonensis, subgen. et sp. nov. Holotype. Eight 

 half, palatal view. X 2/3. 



Fig. 13. — Oreodontoides oregonensis, subgen. et sp. nov, Holotype. 

 Eight half, superior view. X 2/3. 



