PETERSON: A REVISION OF THE ENTELODONTIDA 189 
of a facet on the fibular angle of the head, which is quite prophetic of the conditions 
found in Dinohyus. The anterior portion of the distal face is taken up by the facet 
for Mt. IV, that for Mt.-V being entirely absent in the type. The palmar face is 
greatly excavated above the hook ; the latter is very prominent and covers the entire 
lower portion of the palmar face. Distally there is on the tibial angle a facet of 
considerable size for the palmar process of Mt. IV. 
The vertical diameter of the cuboid is relatively less than in the Princeton 
specimen, which in this respect as well as in the deeper tendinal sulcus on the fib- 
ular side of the Carnegie Museum specimen, seems to agree more nearly with Ente- 
lodon magnum (88, pp. 448-449, Pl. XXXVI, figs. 34, 35, and 36). In the latter 
species the facet on the palmar hook for the palmar process of Mt. IV is absent, 
and the facet for Mt. V on the fibular-distal angle is present, just the reverse of 
what appears in Dinohyus, in which there is no facet for Mt. V, and there is a facet 
present on the palmar hook for Mt. IV. 
MEASUREMENTS OF CUBOID. 
Greatest antero-posterior diameter 
Gs transverse of 
“vertical tf anteriorly 
a by re posteriorly oo... ccceeeseeecee essences eeeeeeeeeenees Ak 
Metatarsal I. —'The second metatarsal is reduced toa very small oblong nodule 
about half the size of Mt. IL in the Princeton specimen. The nodule is held in 
place chiefly by the distal end of the entocuneiform, for which it has an articulating 
facet of considerable size on the palmar face. On the proximal tibial angle is a 
small facet for the ectocuneiform. 
MEASUREMENTS OF SECOND METATARSAL. 
Mm. 
Greatest length 22 
me transverse diameter........... 18 
a antero-posterior diameter... 7 
Metatarsal IL. —'The third metatarsal is larger and slenderer than Me. IIT, but 
the articular facets for Mt. IV on the third metatarsal are surprisingly similar to 
the corresponding facets for Mc. TV. Thus the fibular angle of the head rises to a 
prominent tubercle which overlaps the head of Mt. IV and articulates with the 
cuboid in much the same manner in which Me. III articulates with the unciform. 
This character of the pes seems to be a modification perhaps brought about since 
Oligocene times, as the genus Archezotherium has only a very faint suggestion of a 
facet for the cuboid, and has the fibular angle of the head of Mt. III only very 
