1915.] Matthew and Granger, Lower Eocene Wasatch and Wind River Faunas. 20 
Granger obtained a number of upper and lower jaws more or less frag- 
mentary, affording between them a fairly complete reconstruction of upper 
and lower cheek teeth. | 
The distinctions from D. protenus are the larger and more robust teeth, 
> 
r] 
~, 
~ 
~ 
Se 
z= af) 
W/m 
See 
Fig. 16. Didymictis altidens, palate, natural size. No. 14750, Lost Cabin beds, Wind 
River Basin, Wyoming. 
heavier protocone and deuterocone of p*, discontinuous internal cingulum 
of m!, m? more oval in outline, less extended transversely, with broader 
anteroexternal cingulum and more reduced metacone, lower premolars with 
