398 
Another specimen of the fore-foot of P. medium, formed of three 
entire fingers, the vestige of a thumb, and of a little finger, came 
under the observation of M. Cuvier. He also obtained carpal remains, 
which, from their size and proportions, he was confident in attributing 
to P. magnum and minus. 
In the plaster-of-paris, bones of the upper extremities were also 
found, which were divisible by the species of articulation employed in 
the elbow, into those of two distinct genera. In one set of the radii, 
the upper head was divided in the middle by a ridge, on each side of 
which was a depression ; and, in the other set, there were three de- 
pressions, separated by two blunt ridges. 
The former of these, those with two depressions, were ascertained 
to belong to the genus Palceotherium. Ossa humeri were also found, 
corresponding in their lower head with these radii, and consequently 
having two prominences corresponding with the depressions in the 
head of the radius. The ulna of this genus appeared to resemble very 
much that of the tapir : some differences were, however, observable, 
but these were but slight. 
To obtain the information which M. Cuvier possesses, respecting 
the scapulae of the animals of this, and of those of the succeeding genus, 
must have required, as he justly observes, prodigies of patience, in 
those who separated the parts of these tender and fragile bones, from 
the stone in Avhich they were imbedded. In consequence of these 
successful exertions, he was enabled to ascertain, that these bones were 
all referable to two general forms In the one kind there existed no 
acromion, the spine raising itself gradually unto about two thirds of 
its length, where is its most projecting part, and where its edge is 
most widened, and blending itself forwards with the outer face of the 
scapula. The scapula of this description appears to have belonged to 
this genus : the other kind of scapula, which appears to have belonged 
to the genus Anoplotherium , will be noticed in its place. 
The existence of three toes on the hind feet of this genus, is proved 
