PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 249 
MEASUREMENTS OF CALCANEUM. 
Mm, 
Greatest length... 
Greatest transverse diameter. 
Length of tuber from sustentacultim,to free endii..ccc.ss.cc.uscvecsestocssnuavewacesse cet setenaescevecus<ctoantes 40 
Navicular. —The navicular differs from that of Daphenus by having a propor- 
tionally greater antero-posterior diameter, which is due almost entirely to the 
development of the palmar border in 
the Miocene genus. The tuberosity on 
the tibial face is also fully as prominent 
as in the Oligocene form, entirely un- 
like that in Canis, and is not dissimilar 
. to what is found in the recent tiger or 
lion. The palmar face is, as stated, 
greatly produced, and formed. into a 
large tuberosity, which, however, is not 
- 
reduced transversely by the deep notches Fic. 45. Navicular (right side) of D. superbus. Nat. 
size. 1, dorsal view; 2, superior view; 3, fibular view ; 
on the tibial and fibular sides as in Ca- i, pikdend ib : bade HOGTE flblel Hee: 
nis, but presents a more nearly perfect 
triangular outline of the entire bone when viewed from aboye or below. On the 
fibular face are two small facets, one palmar and the other dorsal. The one lo- 
cated dorsally is sometimes wanting, but in the type it is faintly indicated and 
touches the lower portion of the facet on the proximal dorsal angle of the cuboid 
when extreme rotation takes place, while the palmar facet articulates with a cor- 
responding facet on the proximal palmar angle of the cuboid. The facet for the 
head of the astragalus is concave in the usual manner, while the facet for the en- 
tocuneiform is quite large and is not crowded posteriorly in the same degree as in 
Canis or Felis. 
MEASUREMENTS OF NAVICULAR. 
Mm. 
Greatest antero-posterior diameter . 21 
Greatest transverse diameter 24 
Greatesh-v chica CIAMeter scoravseral Cuavevavcssscseveeticcte'eUeosussteveis deve rear eniteetcerececelr et aaiateaaehee ab 
Entocuneiform. — The entocuneiform, though of considerably smaller size pro- 
portionally than in Daphenus, is still of large size, and occupies a more dorsal posi- 
tion in the tarsus than in recent forms. The bone is high, laterally compressed, 
having the transverse diameter greater on the plantar side than on the dorsal side, 
and possesses a large plantar hook, which causes the articulation for Mt. I to be 
