1915.| Matthew and Granger, Lower Eocene Wasatch and Wind River Faunas. oo 
parastyle moderately extended, paracone much larger than metacone, narrow cingu- 
lum around protocone, no hypocone; m2? decidedly smaller than m1, m? minute. 
Lower molars with trigonid larger than heel, m; two-rooted, much smaller than Mp; 
heels basined, trigonids low. Premolars rather small, spaced, p; one-rooted. Canine 
moderately large, not compressed. 
Ss Was i } 
vi HS S \ (| Y | 
LE Ie mi 
AN mit i 3 
PAN ut y Te 
Fig. 29. Miacis exiguus, lower jaw, inner, occlusal and outer views, enlarged to two 
diameters, with outline of natural size. No. 15717, upper Gray Bull beds, Big Horn Basin. 
The heel of mz is badly preserved in this specimen, and has been interpreted from No. 15718. 
This species is of the size of Vulpavus australis but the construction of 
the molars agrees with Miacis. It is perhaps a descendant of M. exrguus. 
It is a little larger than M. parvivorus:of the Bridger, the tubercular denti- 
tion is relatively larger, and the upper molars broader. Only the type 
