122 DISTRIBUTION OF EXTINCT ANIMALS. [PART II. 
deposits in Burmah, and by two others from the Pliocene of the 
Nerbudda Valley ; while Hippotheriwm—a slender, antelope-like 
animal, found in the Siwalik Hills and in Europe—is supposed 
to form a transition from the Equide to the Tapiride. These 
latter are found in the Upper Indus deposits, where there is a 
species of Zapirus, and one of an extinct genus Antelotherium. 
Of Rhinoceros, five extinct species have been found—in the 
Siwalik Hills, in Perim Island, and one at an elevation of 16,000 
feet in‘the deserts of Thibet. Hippopotamus occurs in the Plio- 
cene of the Nerbudda, and is represented in the older Miocene 
deposits by Heaxaprotodon, of which three species have been 
found in various parts of India. Another remarkable genus, 
Merycopotamus, connects Hippopotamus with Anthracotherium, 
one of the extinct European forms allied to the swine. These 
last are represented by several large species of Sus, and by the 
extinct European genus Cherotheriwm. 
The extinct Anoplotheride are represented by a species of 
the European genus Chalicotherium, larger than a horse. 
An extinct camel, larger than the living species, was found 
in the Siwalik Hills. 
Three species of deer (Cervus) have been found in the 
Siwaliks, and one in the Nerbudda deposits. 
A large and a small species of giraffe (Camelopardalis) were 
found in the Siwalik Hills and at Perim Island. 
The Bovide are represented by numerous species of Bos, and 
by the extinct genera Hemibos and Amphibos. There are also 
three species of antelopes, one of which is allied to the African 
Alcephalus, 
We now come to an extraordinary group of extinct animals, 
probably forming a new family intermediate between the 
antelope and the giraffe. The Sivatheriwm was an enormous 
four-horned ruminant, larger than a rhinoceros. It had a short 
trunk like a tapir, the lower horns on the forehead were simple, 
the upper pair palmated. The Bramatherium, an allied form 
from Perim Island, showed somewhat more affinity for the 
giraffe. 
Proboscidea.—No less than seven species of elephants and four 
