PYROTHERIUM 173 
the present consider it as belonging to Pyrotherium. We 
found a couple of metapodials evidently belonging to the 
foot as described. This carpus 
is of the primitive type, the sca- 
phoid and luna being large and 
receiving the radius; while the 
pyramidal is smaller, low and 
broad and received the ulna. The 
trapezium is larger than usual, 
being elongated and standing out 1 
from the trapezoid, and support- 
- Fig. r1o. Left carpus and metacarpus, 
ing a reduced first metacarpus. outlines after ‘Tournouer—1/5 natural 
The trapezoid is also large and 
almost square in outline. The magnum is smaller and con- 
siderably flattened. The unciform is very large. These last 
three mentioned carpals carry the three medium meta- 
carpals which are quite normal and seem to have carried 
most of the weight of the animal. Metacarpus V articulates 
on the outer side of the unciform. It is a massive nodular 
bone with but a tiny articulation for the phalanx, which 
seems on this toe to have been reduced. Metacarpals IV, 
II], and II are short, stout bones, flattened from front to 
back, and enlarged at either end. On each, the trochlea 
extends well onto both the dorsal and palmar surfaces, thus 
giving the toes a considerable range of movement, and 
indicating at least a semidigitigrad mode of walking. 
Of the pelvis, the ilium is known as a broad, heavy 
bone with the acetabulum facing down. The hind limb 
is considerably longer than the front, and approximately 
pillar-like. The femur, as compared with the humerus, 
is quite a little longer, though, as femora go, it is not a 
long bone. The rounded sessile head stands high above 
the blunt, thick greater trochanter; the digital fossa is 
barely indicated; the rotular trochlea is short; the two 
condyles are subequal in size and set close together. The 
patella is short and nodular. ‘The tibia is short and very 
at Tir Ty 
