194 



Annals of the Carnegie Museum. 



The dental formula, as previously indicated, was probably I^, C^, 

 pi, M^, though possibly there were but three premolars. 



The third incisor — the only one preserved — is caniniform, and 

 posteriorly there is a groove worn by contact with the lower canine. 

 P^ is oblong, the apex being anterior to the middle. P^ is much 

 longer and the posterior portion is broader than the anterior. Pi has 

 no anterior inner cusp, but there is a broadening of the crown with a 



Fig. 32. Dinocyon ossifragus (No. 790). Loup Fork, Lower Madison valley, 

 i natural size. 



gentle slope to accommodate the inner root. Mi is broad, its trans- 

 verse being far greater than its antero-posterior diameter. The outer 

 cusps are worn down to two slightly convex areas. The inner cusp is 

 low and crescent-shaped. The inner cingulum is broadest and most 

 prominent postero-internally to the inner cusp, where it forms a large 

 evenly convex ridge. The second molar on the right side does not 

 appear to be a normal tooth. 



