FOSSIL MAMMAL GALLERY. 
71 
and skulls of the two existing species of Elephants. The fore- 
runners of the Proboscidea from the Eocene strata of Egypt, 
as represented by Pcdceoriiastodon and Mceritherium, are also 
W of special interest. Attention may likewise be directed to 
f the skull of the gigantic Euminant Sivatherium (fig. 45), 
from the Siwalik deposits, an ally of the African Okapi (p. 35), 
with which it is connected by Helladotliermm of the Grecian 
Tertiary deposits. Another allied type is Samothermm, from 
the Isle of Samos, of which a skull (fig. 46) is exhibited. 
In the pavilion, or large room at the end of the gallery, 
Fig. 4r). — Skull of Sivatherium giganteum. from the Pliocene Deposits of the 
Siwalik Hills, India. 
are skeletons and bones of the mammals of the order Edentata, 
mostly from South America, including some fine specimens of 
the great Ground Sloths, the largest of which, the Megatherium, is 
shown in the act of rearing itself on its hind legs and powerful 
tail to seize and tear down the branches of a tree in order to 
feed upon the leaves. That this was the habit of this huge 
animal is clearly indicated by the structure of its bones and 
teeth. The mounted specimen is not an actual skeleton, but is 
composed of plaster casts of the real bones, most of which are 
in the wall-case at the north side of the room. Of the Mylodon, 
a smaller but nearly allied form, an almost perfect skeleton 
