EPOREODON 



73 



the postglenoid process is relatively small and is triangular in outline. The paroccipital process is 

 anteroposteriorly compressed and extends downward and well outward from the median line of the 

 bulla to terminate inferiorly in a thin tip. The bullse are relatively enormous, full and ovate, and 



1/0/ 1, TYPE 



Y. P. M. 



Fie. 35. — Eforeodon longijrons ferbullatus Thorpe. Skull and jaw. HT. Cat. No. 11011 Y.P.M. 2/5 nat. size. 



(After Thorpe, 1921.) 



nearly twice the size of those in E. leptacant/ms, which is the largest species of this genus so far 

 described from the John Day Basin. They are pitted in the same manner as in E. longijrons. 

 Index: 0.55a. 



Fig. 36. — -Eforeodon longijrons ferbullatus Thorpe. Left half, inferior view of skull. HT. Cat. No. 11011 Y.P.M. 



2/5 nat. size. 



11011. ivn. 

 Y. P. M. 



Fig. 37. — Eforeodon longijrons ■ferbullatus Thorpe. Left half, superior view of skull. HT. Cat. No. 



2/5 nat. size. (After Thorpe, 1921.) 



1011 Y.P.M. 



Mandible: The symphysis is strong and coossified and has a symphysiodental angle of 45°. 

 The chin is slightly concave in profile. The horizontal ramus is relatively slender beneath the 

 tooth row, and the mental tubercle is prominent. The angle is well marked, the masseteric fossa 

 deep, the coronoid process thin and low, the sigmoid notch moderately small and wide open, and 

 the convex condyle transversely wide. 



