230 M. R. Thorpe — Jolin Bay Promerycochosri, 



The total length is 250 mm. The masseteric fossa is 

 quite deep and oval-shaped. The condyle and coronoid 

 are of about equal height. The length of the inferior mo- 

 lar series is 77 mm. and that of the premolars, including 

 the canine, 68 mm. The depth from the condyle to the 

 angle is 138 mm. Specimen No. 10994, from Bridge 

 Creek, has a very hea\^^ outer margin on the squamous 

 portion of the zygoma, and the bullae do not extend below 

 the postgienoid. No. 10966, from Clarno Bottom, and No. 

 10956, from Haystack Valley, are both slightly different 

 from the type. The latter is apparently older strati- 

 graphically than the majority of the specimens of this 



Fig. 1 A. 



Fig. 1 B. 



Fig. 1. — Fromerycochoerus lulli,' sp. nov. Holotype. Cat. No. 10234, 

 Y. P. M. A, right lateral view of skull and jaw; B, right half, superior 

 view. X ^' 



