1915.] Matthew and Granger, Lower Eocene Wasatch and Wind River Faunas. 103 
Type, No. 78, part of lower jaw with ps—m». 
Specific characters: Ps-m; = 23.8; depth of jaw at ms; = 13. 
The type is from the Wasatch of the Gray Bull River, Big Horn Basin, 
exact horizon unrecorded but almost certainly from the Gray Bull level. 
Another jaw fragment from the Big Horn Basin, level unrecorded, was 
referred to the species by Osborn, but shows no teeth. 
Hapalodectes compressus Matthew 1909. 
Hapalodectes compressus MartHew 1909, Mem. A. M.N.H., Vol. IX, p. 499, pl. 
xlv, fig. 5, text fig. 101. 
Type, No. 12781, lower jaw from Lysite horizon of Cottonwood Creek, Wind 
River Basin. Paratype No. 12782 from same level and locality. 
Specific characters: Ps-ms = 22; depth of jaw at m3 = 11.4. 
No. 14748, a lower jaw from the Lost Cabin beds of Alkali Creek is 
more clearly differentiated than the type from H. leptognathus, the lower jaw 
having a depth of only 9 mm. and the molars still more compressed, the 
canine very long and slender. Another jaw from the Lysite of Buffalo 
Basin in the Big Horn Valley agrees more nearly with the type. 
