BY C. W. DE VIS, M.A. 125 
the condyle and merging quickly into the convex edge of 
the shaft above ; externally, by a convex edge, as in Sar- 
cophilus. This edge, however, becomes, at some distance 
from the condyle, a sharp ridge, which runs inwards upon 
the shaft and subsides in a low rough swelling (possibly the 
insertion of the quadratus) occupying the middle of the 
mid-fourth of the posterior face. Above this swelling, on 
the inner edge of the shaft, is the very small foramen for the 
interfemoral artery. 
At the distal end of the bone sarcophiline affinities 
preponderate greatly—phascolomine are virtually absent. 
The most conspicuous feature of this extremity in the 
wombats, recent and extinct, is the superior length of the 
inner condyle whose articulating surface is on its inner 
side produced upwards into a gibbous prominence from 
which the epiphysial line slopes downward in its outward 
course. The writer is not aware of any other marsupial in 
which the inner condyle is the longer—in almost all, e.g., 
Sarcophilus, it is distinctly the shorter, and our fossil obeys 
the general rule. Init also the inner edge of the articula- 
ting surface of this condyle is deeply sinuous above 
(anterior to) the middle of its length—marsupial femurs 
generally (excepting that of the wombat) show a similar 
sinuosity in varying degree and position, but none so 
strikingly parallel to that of the fossil as Sarcophilus. The 
anterior portion of the articulating surface of the outer 
condyle is as boldly but not as broadly convex as in 
Macropus, but in its backward course the convexity is 
interrupted by a depression of the outer two-thirds of the 
surface deeper than in Phascolomys but not, as in Sarco- 
philus, continued outwards as a groove upon the non- 
articulating surface. Behind the pit-like depression, the 
convexity is resumed; but quickly changes into the broad 
groove before mentioned which occupies the greater part 
of the surface. Unfortunately, the part which in Macropus 
forms the prominent outer lip of this groove and which 
would enable us to gauge its comparative depth, was 
broken off before burial (it is the sole imperfection of the 
bone), but it appears to have been somewhat less deep than 
in M. major. The intercondylar groove is relatively 
narrower and, instead of expanding mesially, is a little 
