12 Bulletin American Museum of Natural History. 
[Vol. XXXIV, 
is longer than in Vulpavus and Palearctonyz. 
The shaft of the radius is 
smaller in proportion to the ulna, and the shaft of the fibula is larger in 
proportion to the tibia than in the Miacidz; the distal facets of tibia and 
fibula are somewhat more oblique and the astragalar trochlea of the tibia is 
_— 
\ 
\ 
\ 
\ 
| 
\ 
| 
| 
| 
| 
| 
a“ 
MVOXRASS ZO? 
A. I. 
wy), / ff \\ \ 
| -2° py \ S, i \ 
s ; py NG 
\ Ih, Yj, 
Fig. 9. Phryptacodon olsent, hind limb bones natural size, front view of femur, inner and 
front views of tibia, the latter with fibula somewhat displaced in matrix. Type specimen. 
cyonide. 
less excavated than in Vulpavus. The styloid process of the radius is less 
prominent. In all these features it approaches more nearly to the Arcto- 
