52 
EAST WING. 
placed a number of large and striking objects, of too great a size 
to be contained in the wall-cases. The first is a nearly complete 
skeleton of the American Mastodon, an animal closely allied to 
the elephant, from which it is chiefly distinguished by the 
characters of its molar teeth. Beyond this is the skull of an 
Elephant (Mephas ganesa), remarkable for the immense length 
of its tusks, from the Siwalik Hills of India, and another of the 
Mammoth (Mephas primigenius) with huge curved tusks, in a 
perfect state of preservation, found in the brick earth at Ilford 
in Essex. Then follow skeletons of the great extinct Irish Deer 
(Cervus giganteus), male and female, the former distinguished 
by its magnificent palmated antlers, resembling those of a 
fallow deer on a large scale. 
Here has lately been placed, through the liberality of 
Professor 0. C. Marsh, a model of a perfect skeleton of the 
Uintatherium or Dinoceras mirabile, one of the most remarkable 
of the many wonderful forms of animal life lately discovered in 
the Tertiary beds of the western portion of the United States of 
America. This animal combines in some respects the characters 
of a rhinoceros with those of an elephant, and has others 
altogether special to itself. The group to which it belonged 
became extinct in the Miocene period, without leaving any 
successors. 
Beyond this is a skeleton of a very rare and interesting 
animal, the Northern Manatee or Sea Cow (Bhytina gigas), the 
last known resort of which was Behring's Island in the North 
Pacific, where it was completely exterminated towards the close 
of the last century. In the same case is placed the skeleton of 
a smaller allied form, the Halitherium, from the Miocene of 
South Germany. These, with their existing representatives, the 
Manatee and Dugong (see Osteological Gallery, West Wing, 
Second Floor, p. 45), belong to the order Sirenia, aquatic mammals 
of fish-like form, presenting considerable external resemblance 
to Cetacea (the Whales and Dolphins), although differing from 
them in many essential points of structure and habit. 
Fossil remains The wall-cases on the south side (right on entering) con- 
of Man. ^ a - n remams 0 f Man found under such circumstances as may 
justify the appellation of " fossil," in caves or in Pleistocene de- 
posits, associated with the bones of animals either completely 
