CHAP. XVII.] 
MAMMALIA. 
173 
are Myiopithecus, Cercopithecus, Cercocebus, Theropithecus, and 
Cynoeephalus ; the Oriental genera, Macacus, and Cynopithecus. 
Myiopithecus (1 species), consisting of the talapoin monkey of 
West Africa, differs from the other African monkeys in the 
structure of the last molar tooth ; in the large ears, short face, and 
wide internasal septum ; in this respect, as well as in its grace 
and gentleness, resembling some of the American monkeys. 
Cercopithecus (24 species), contains all the more graceful and 
prettily coloured monkeys of tropical Africa, and comprises the 
guenons, the white-nosed, and the green monkeys. They range 
from the Gambia to the Congo, and from Abyssinia to the Zambesi. 
Cercocebus (5 species), the mangabeys, of West Africa, are 
very closely allied to the eastern genus Macacus. 
Theropithecus (2 species), including the gelada of Abyssinia 
and an allied species, resemble in form the baboons, but have the 
nostrils placed as in the last genus. 
Cynocephalus (10 species), the baboons, are found in all parts 
of Africa. They consist of animals which vary much in ap- 
pearance, but which agree in having an elongated dog-like 
muzzle with terminal nostrils, and being of terrestrial habits. 
Some of the baboons are of very large size, the mandrill ((7. 
maimon ) being only inferior to the orang and gorilla. 
Macacus (23 species), is the commonest form of eastern monkey, 
and is found in every part of the Oriental region, as well as in 
North Africa, Gibraltar, Thibet, North China, and Japan ; and 
one of the commonest species, M. cynomolgus , has extended its 
range from Java eastward to the extremity of Timor. The tail 
varies greatly in length, and in the Gibraltar monkey (M. innus) 
is quite absent. A remarkable species clothed with very thick 
fur, has lately been discovered in the snowy mountains of 
eastern Thibet. 
Cynopithecus (? 2 sp.). — This genus consists of a black baboon- 
like Ape, inhabiting Celebes, Batchian, and the Philippine 
Islands ; but perhaps introduced by man into the latter islands 
and into Batchian. It is doubtful if there is more than one 
species. The tail of this animal is a fleshy tubercle, the nostrils 
as in Macacus, but the muzzle is very prominent; and the 
