266 MEMOIRS OF 
THE CARNEGIE MUSEUM 
concave in the vertical direction than in Daphanodon, which results from the greater 
development of the ascending plantar tuberosity of the present form. The meso- 
and ectocuneiforms are similar to those in Daphwnodon. 
Fic. 61. Fragments of Hind Limb and Foot 
of Borocyon robustum. % nat. size. No. 1918.1 
dorsal view of tibia and fibula ; 2, dorsal view of 
hind foot. 
tendon on the cuboid, a transversely 
Metatarsal III has the articular surface 
for the ectocuneiform less oblique and the 
tibial and fibular faces of the head less exca- 
vated than in Daphenodon. Mt. V is quite 
unlike that of the latter genus in respect to 
the articular facets of its head. The tibial face 
has a somewhat smaller facet for Mt. [IV and 
the facet for the cuboid is entirely proximal, 
while in Daphenus and Daphewnodon the facet 
for the cuboid extends well in the fibular di- 
rection, encroaching on the base of the ascend- 
ing process so as to form a lateral as well as a 
proximal contact with the cuboid. Another 
important difference from the older forms is 
seen in the vertical position of the ascending 
process on the fibular face of the head. In 
the Oligocene and Miocene forms, here used 
for comparison, this process is very heavy 
and projects upward and outward forming, 
with the excavation for the peroneus longus 
broad groove. In the present genus the ascend- 
ing process, though large, is directed more vertically and the space between it and 
the fibular face of the cuboid is comparatively narrow. Near the proximal ends 
the shafts of the meatarsals are slightly triangular in cross-section. The distal end 
of Mt. V? is somewhat less expanded transversely than in Daphanodon, but the 
trochlea is quite similar, being very 
carina on the plantar aspect. 
convex dorsally and separated by a prominent 
MEASUREMENTS. 
Antero-posterior diameter of canine at base 
Transverse diameter of canine at base . 
Antero-posterior diameter of pz ..... 
Transverse diameter of py ...........64. 
Vertical diameter of ramus at pz ........... 
Length of ? ninth caudal .... 
Antero-posterior diameter of trapezoid 
Greatest transverse diameter of trapezoid... 
