120 
POPULAR SCIENCE REVIEW. 
Semnopithecus — of which the Entellus (or Sacred Monkey of the 
Hindoos) may serve as an example — is entirely confined to 
Southern Asia. The other genus, Colohus (remarkable for the 
absence of the thumb), is as exclusively African. 
The third sub-family ( Cynopithecince) contains three genera. 
The first of these, Gercopithecus, is made up of smaller, long- 
tailed African monkeys, some of which are very common in our 
menageries ; as are also species of the second and Asiatic genus 
Macacus, in which the length of the tail is different in different 
kinds. The third genus, Cynocephalus, contains the great and 
brutal Baboons (such as the Mandrill and the Chacma), which 
Fig. 5. 
The Chacma Baboon {Cynocej^halus). 
are entirely confined to Africa and that part of Asia whicli 
is zoologically African — namely, Arabia. 
The second family of apes, the Cehidm^ or monkeys of the 
New World, need not be noticed here in much detail. Amongst 
them maybe noted the Spider Monkeys, Ateles, with long prehen- 
sile tails, but as thumbless as the African kinds before noticed. 
The commonest American monkeys are the Sapajous 
{Cehus), which are those generally exhibited for their tricks 
by itinerant Italians. They have long tails curled at the end, 
but not capable of grasping with the power possessed by the 
tails of the Spider Monkeys. 
The Howling Monkeys (^Mycetes) are sluggish and apparently 
st upid animals. They have long and very prehensile tails ; 
but, as their name implies, it is their power of voice which 
particularly distinguishes them. 
