FOSSIL MAMMAL GALLEEY. 
75 
(fig. 46), from the Siwalik deposits of India, an ally of the 
African Okapi (p. 37), with which it is connected by Hellado- 
therium of the Grecian Tertiary deposits. Another allied type 
is Tragoceros, or Samotlierium^ from the Isle of Samos, of which 
a skull (fig. 47) is exhibited. 
In the pavilion," or large room at the end of the gallery, 
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 
Fig. 46. — Skull of Sivatherium giganteum, an extinct Ruminant from the 
Pliocene Deposits of the Siwalik Hills, India. 
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 w^hich are 
in the wall-case at the north side of the room. Of the Mylodo7i, 
a smaller but nearly allied form, an almost perfect skeleton 
is exhibited in a glass case near the Megatherium. Close by is 
a portion of the skin of one of these animals (Grypotherium listai), 
from a cave in Patagonia, showing the hair, and also the nodules 
of bone with which the inner surface is studded. ISTot far off is 
