CHAP. XVII.] MAMMALIA, I73 



are Myiopithecus, Cercopithecus, Cercocehus, Theropithecus, and 

 Cynocephahis ; the Oriental genera, Macacus, and Cynoyithecus. 



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. 



Cercocehus (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 (C. 

 maimon) being only inferior to the orang and gorilla. 



Macacus (25 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 



