54 NOTES ON THE CANID# OF THE WHITE RIVER OLIGOCENE. 
(Js) 
more widely separated from the external astragalar facet than in Canis. In the latter 
genus occurs a third astragalar facet, which is distal to the sustentaculum, and which is 
found in neither Dinictis nor Daphenus. The distal end of the calcaneum is occupied 
by the large cuboidal facet, which is more regularly oval in outline and much more deeply 
concave than in the existing forms of Canide. In these forms we find a facet for the 
nayicular, which adjoins and forms a right angle with the accessory astragalar surface 
already mentioned, but is not present in either of the White River genera. On the 
external side of the caleaneum, near the distal end, is a prominent projection for liga- 
mentous attachment. This process is not present in Canis, but it recurs in Dinictis, less 
markedly in Hoplophoneus, and is found in many of the recent viverrines, mustelines 
and raccoons. 
The cuboid is not peculiar in any noteworthy way; it is longer proximo-distally 
than in Dinictis and is proportionately narrower and thinner (7. ¢., in the dorso-plantar 
diameter). The long, thick and rugose ridge which on the fibular side of the bone over- 
hangs the suleus for the peroneal tendons is more prominent, especially on the plantar 
face, than in the Machairodont, but lacks the great, rugose plantar protuberance, which 
occurs in the recent Canide. The facet for the caleaneum is more convex than in 
Dinictis, very much more so than in Canis, in which this surface is almost plane. On 
the tibial face of the cuboid are three facets, a narrow proximal one for the navicular, 
and a median and minute distal facet for the ectocuneiform. The facet for the head of 
the fourth metatarsal is very much more coneaye than in the modern dogs, while that 
for mt. v is smaller than in the recent forms, and lateral rather than distal in position. 
The navicular, as compared with that of Canis, is short proximo-distally, but broad 
transversely, not having undergone the reduction in width which Schlosser mentions as 
characteristic of the recent members of the family. The astragalar facet is not more 
concave than in the latter, and there is no such stout tubercle on the plantar side of the 
bone as occurs in them. Two very small facets articulate with the cuboid, one near the 
dorsal and the other near the plantar border of the fibular side. The distal facets for the 
three cuneiforms have nearly the same shape and proportionate size as in Canis, but they 
are more in the same transverse line, the surface for the entocuneiform being less dis- 
placed toward the plantar side. 
The entocuneiform is of similar shape, but relatively better developed than in Canis, 
as would naturally be expected from the presence of a complete hallux in Daphenus. 
The bone is long proximo-distally, thick antero-posteriorly, and narrow, though broader 
than in Canis, and its proximal and distal facets, for the navicular and first metatarsal 
respectively, are relatively larger and more coneaye. The only other facet is an obscurely 
marked one on the tibial side for the mesocuneiform. 
