896 The Condylarthra. [Septenbe 
ilium is not much expanded, but its posterior superior borte: 
thinned out. The anterior border is decurved in front ™ 
peduncle is distinct and rather short, and has a triangular sca 
the narrower face being anterior and only apparent net © 
acetabulum (Fig. 18). 
The posterior foot was not entirely plantigrade, but was n® 
more so than in Tapirus, adding a digit on each side to the thee 
possessed by that genus. These digits are arranged in te= 
of a circle, so as not to give unusual wid?® 
the foot, The third is longer than the se 
and fourth, and the fifth is longer than & 
first. The astragalus has much the bm“ 
that of a carnivorous mammal. The lis 
crests are well developed and of unequal È 
vation, the external being the most sd 
The median groove is wide and deep. ie 
neck is distinct, and is — and is % 
slightly inwards. The head iS 
val, fe its articular surface is a 
convex in all directions (Fig. 17). The j 
langes are not shortened, and the ungu“ 
Fic. 17. Phenacodus Well developed, flat and obtuse. ot da 
primevus; carpus and Tt is thus evident that the detail 
tarsus, one third nat. 5 are as poe 
size, from animal ce ters of the skeleton of this genu inal acl 
Fig. a, arpus, proxi ‘ial itive as those derived from the 
the k 
a a ai A cast of ii- crinii ca sot the bait 
and calcaneum, distal lowing as the general characte prs 
cunetform “aie Mens, The cerebral hemispheres al sorter 
imal v small, each one being less by one a $ 
the cerebellum. They are separated from the ae an terior 0 | 
large olfactory lobes by strong constrictions. ae groo 
is occupied by a thick tentorium. In like manner pi 
for a robust falx separates the hemispheres ripe 
` resents the Sylvian fissure, and the lobus mere AA 
The vermis of the cerebellum is i by "r 
fetes lobes are large. They are impressed r col 
rous bones, as in various ruminants. The — ae 
the medulla are not visible. There are traces of com 
the hemispheres (Fig. 19). 
