CHAP. XVII.] 
MAMMALIA. 
213 
Europe and North America ; while a still more ancient form of 
large size is found in the Lower Eocene of France and England, 
indicating an immense antiquity for this group of Mammalia. 
There are many other extinct forms connecting these with the 
Palseotheridae, ^already noticed in chapter vi. (vol. i. pp. 119-125). 
Family 45. — RHIN OCEEOTIDiE. (1 Genus, 9 Species.) 
Gexeral Distribution. 
Neotropical 
Sub-regions. 
Nearctic 
Sub-regions. 
Palasarctic 
Sub-regions. 
Ethiopian 
Sub-regions. 
Oriental 
Sub-regions. 
Australian 
Sub-regions. 
— 
| 1.2 
Living Si 
Extinct 
| 1 . 2 . 3. 4 
■ecies. 
1 . 2.3 — 
Species. 
I- — 
3.4 
1 _ 3 _ 

Living Rhinoceroses are especially characteristic of Africa, with 
Northern and Malayan India. Four or perhaps five species, all 
two-horned, are found in Africa, where they range over the whole 
country south of the desert to the Cape of Good Hope. In the 
Oriental region there are also four or five species, which range 
from the forests at the foot of the Himalayas eastwards through 
Assam, Chittagong, and Siam, to Sumatra, Borneo and Java. 
Three of these are one-horned, the others found in Sumatra, and 
northwards to Pegu and Chittagong, two-horned. The Asiatic 
differ from the African species in some dental characters, but 
they are in other respects so much alike that they arc not gene- 
rally considered to form distinct genera. In his latest catalogue 
however (1873), Hr. Gray has four genera, Rhinoceros (4 species), 
and Cercitorhinus (2 species), Asiatic ; Rhinaster (2 species), and 
Ceratotherium (2 species), African. 
Extinct Rhinocerotidce. — Numerous species of Rhinoceros ranged 
over Europe and Asia from the Post -pliocene back to the Upper 
Miocene period, and in North America during the Pliocene period 
