1915.] Matthew and Granger,-Lower Eocene Wasatch and Wind River Faunas. BE 
(5) deuterocone of p* with heavy posterior flange; (6) inner cusp of p? more prominent 
than in lupina; (7) size larger than lupina, teeth more robust throughout, jaw deeper 
and more massive. 
To this species are referred the larger specimens from the Gray Bull 
horizon in the Big Horn Basin, including the mounted skeleton described by 
Fig. 45. Ozxyena forcipata, upper jaw, outer and occlusal view, natural size. From 
No. 15183, Gray Bull beds, Big Horn Basin. 
Wortman as O. lupina. Cope referred to O. forcipata, all the Big Horn 
Basin specimens in his collection, including parts of this same skeleton; 
our additional material confirms the reference. In addition to the skeleton 
