H 
252 MEMOIRS OF THE CARNEGIE MUSEUM 
ulations ; the two proximal ones are small indistinct facets which articulate, one with 
the head of the astragalus and the other (near the plantar surface) with the navicular. 
This curious feature of articulations in the tarsal bones is quite unusual and is also 
found in Daphenus and toa less degree in Hoplophoneus, as Mr. Hatcher observed in 
his study (‘The Oligocene Canidee,” p. 91). In the middle region of the tibial face 
is the third facet, which is of considerable size ; it is triangular in outline and articu- 
lates with the ectocuneiform. Proximally the cuboid has a large surface for the 
ealcaneum, which is convex in all directions in a greater degree than in Canis or 
Felis and even more than in Hoplophoneus, though not nearly so oblique as in the 
latter. Distally there is one large facet for metacarpals IV and V, which is concave 
antero-posteriorly and also slightly concave laterally, the extreme fibular border 
being slightly recurved upward to accommodate the lateral portion of the proximal 
facet of Mt. V. 
MEASUREMENTS OF CUBOID. 
Mm. 
Greatest antero-posterior Aiam ober s. 210. ectse.sc.seescoeesacensssssassevss Crete deccosschase sertadeasguteduecsasordee 20 
Greatest transverse diameter. 
Greatest vertical diameter 
Metatarsal I, —'The first metatarsal has the appearance of being shorter than 
that of Daphenus when placed in position in the pes, but it isin reality of very 
nearly the same proportionate length, this shortened appearance being chiefly due 
to the proportionally less vertical diameter of the entocuneiform in the Miocene 
genus. These bones (Mt. II) in the two genera are very similar in every respect. 
Asin Daphenus the head is much expanded both antero-pos- 
teriorly and transversely, with two prominently developed 
and rugose tubercles on the plantar face, one on the tibial 
andt eother on the fibular angle. The facet for the ectocu- 
neiform is quite large and is convex antero-posteriorly, but is 
slightly more oblique than that of the Oligocene genus, so that 
ad the digit points more inward when the pes is articulated. 
The shaft is of good proportionate size and is arched forward. 
Fig. 50. Fibularand Dor- | The distal trochlea is hemispherical on the dorsal face and 
sal Views of Right Metatarsal Gy the plantar face it is divided bya strong keel. With the 
T of D. superbus. Nat. size. - : ‘ 
exception of the reduction of the entocuneiform and the 
position of the metatarsal there is no great change of the first digit of the pes from 
that of the Oligocene form, the digit on the whole being more greatly developed 
than in recent dogs or cats, and more resembling that of Viverra zivetta. 
