PETERSON : NEW CARNIVORES FBOM MIOCENE OF WESTERN NEBRASKA 247 
Pes (Pl. LXXXII).—The right hind foot of the type was found almost 
completely articulated. Consequently there is practically no doubt as to the true 
position of each bone in the pes. 
Astragalus. —While the main features of the astragalus are in general quite 
similar to those in Daphanus felinus there are some detailed differences which are 
of considerable importance, and which 
mark the transition from the conditions 
found in the older type to the more modi- 
fied structures in the recent forms. It is 
seen that the articular trochlea for the 
tibia is more perfectly grooved in the pres- 
ent genus than in Daphenus, the internal 
Fia. 43. Anterior and Posterior Views of deeand etna! SU a bite getieas nearly 
ONDER patina Nat aize: subequal, as in Canis. The articulation 
of the tibial face of the internal condyle, 
however, is, widely interrupted by a broad vertical sulcus, which is not present in 
the recent form, nor does it entirely bisect this articulation on the astragalus of 
Daphenus, while in the tiger there is a similar broad area on the inner side of the 
internal condyle. The neck is relatively shorter, though constricted as in Daphenus, 
which is due to the laterally expanded head, as in the cats. The head is inclined 
sharply inward and on the distal face is a large facet for the navicular, which is 
convex in all directions. The calcaneal facets are separated by a deep, narrow 
groove, and are subequal in size, the external being more oblique and less strongly 
concave than in Canis. In the latter genus there is a minute articular facet for the 
calcaneum on the fibular face of the head. In the present genus this small facet is 
also present, but instead of articulating with the distal end of the caleaneum, as in the 
dogs, it comes in contact with the dorso-tibial angle of the cuboid, as in Daphenus 
felinus. 
MEASUREMENTS OF ASTRAGALUS. 
Greatest height 
Transverse diameter of trochlea 
Transverse diameter of head. 
Caleanewm.— On comparing the caleaneum with that of Daphenus felinus 
there is very little difference detected except in size. The palmar face of the 
tuber calcis is more concave antero-posteriorly on its upper portion and slopes more 
gradually toward the distal end than in the Oligocene genus, which is due to a 
