34 MAN AND APES. 



pets. Such are especially (Fig. 14) the 

 Diana Monkey (so called from its white- 

 crescentic band above the forehead) and 

 the White-nosed Monkey (Fig. 15). Both are 

 inhabitants of the warmer parts of Western 

 Africa. 



The Mona Monkey (Fig. 12) is remarkable 

 for its brilliant coloration, its head being 

 yellowish-olive with a black stripe on the 

 forehead, and yellowish whiskers, and a purple 

 face. The back is chestnut brown, and there 

 is a white spot on each side near the root 

 of the tail, which is black. 



The Green Monkey (Fig. 13), from the 

 Cape de Yerd Islands, is one of the commonest 

 and best known species of the genus. 



The White-eyelid Monkeys (Fig. 16) differ 

 in some small characters from the other 

 Cercopitheci, so that they have been by some 

 authors placed in a distinct genus. m hey are 

 also inhabitants of Western Africa. 



All the Cercopitheci have thumbs pretty well 

 developed ; they have also ischial callosities and 



