Fig. 52. Fibular and Dorsal 
MEMOIRS OF THE CARNEGIE MUSEUM 
of the plantar tuberosity. On the fibular face there are 
two facets for Mt. IV, which are separated by a deep sul- 
cus. The dorsal one is located on the posterior face of 
the flange produced from the dorsal portion of the head, 
and extends in the fibular direction so as tooverlap Mt. 
IV, causing a strongly interlocking condition of these 
bones, as in the carnivora generally. The facet back of 
the sulcus is on the plantar tuberosity and articulates 
with a corresponding facet on the plantar tibial angle of 
Mt. IV. The shaft is quite heavy, considerably arched 
in the dorsal direction, and oval in cross-section. The 
distal end is similar to that on Mt. IJ, but has a more 
Views of Right Metatarsal 1II of symmetrical trochlea. 
D. superbus. Nat. size. 
MEASUREMENTS OF METATARSAL III. 
Greatest length. 
Antero-posterior diameter of head 
Transverse diameter of head......... 
Transverse diameter of distal end 
Metatarsal IV.—The fourth metatarsal is the longest in the series. 
rises slightly above that on Mt. III, while the two 
bones extend equally far in the distal direction. The 
proximal face of the head has a large convex facet 
for the cuboid, while on the tibial side there is one 
facet situated on a prominent tubercle which fits into 
a corresponding pit on Mt. III, and the other facet 
for the same metatarsal is located on the plantar 
tibial angle, as stated above, thus causing these bones 
to firmly interlock, as in Daphenus. On the plan- 
tar side there is a heavy tuberosity of cubical appear- 
ance and on the fibular side there is a deep pit sim- 
ilar to, though more pronounced than that for Mt. 
IV on the fibular face of Mt. III. Above this pit is 
a large facet which also articulates with Mt. V. The 
shaft is arched forward in the same degree as that on 
Mt. III, but is further differentiated from the latter 
Fia. 53. Fibular and Dorsal Views 
of Right Metatarsal IV of D. superbus. 
Nat. size. 
by a prominent and rugose elevation for ligamentous attachments similar to that 
of Daphenus. As in Mt.III the distal trochlea is quite;symmetrical. 
