584 



LAND MAMMALS IN THE WESTERN HEMISPHERE 



Fig. 286. — Common Marmoset (Hap- 

 ale). — By permission of W. L. Berridge, 

 London. 



quite long, and the hallux, or 



great toe, is very small ; they 



are thus deficient in grasping 



power. Instead of the flat 



nails common to all the other 



Anthropoidea, they have long, 



sharp claws. All other South 



American monkeys are in- 

 cluded in the family Cebidae 



which, in turn, is divided into 



four subfamilies. It is not 



necessary to consider these 



or do more than cite a few 



illustrative examples. 



Some twenty species of 



the genus Cebus are distrib- 

 uted from Central America 



to Paraguay; they have long, prehensile tails completely 



covered with 

 hair, and well- 

 developed 

 thumbs. The 

 monkeys of this 

 genus are fa- 

 miliar to every 

 one, as they are 

 largely used by 

 organ-grinders. 

 The spider- 

 monkeys {Ate- 

 les) are so 

 called because 

 of the great 



Fig. 287.— Sapajou (CcbMs). — By permission of the New IS^^gth and 

 York Zoological Society. slenderneSS of 



