MONKEYS 31 



confined to the warmer parts of America. All the 

 monkeys yet described by us have nails, which, though 

 more convex and pointed than those of man, are never- 

 theless substantially like his. The marmosets, however, 

 have all their fingers and toes provided with long pointed 



FIG. 



THE SQUIRREL MONKEY. 



claws, with the single exception of the nail of each great 

 toe, which is flattened like our own. All the monkeys 

 hitherto noticed, except the colobi and spider monkeys, 

 which have no thumb at all, have a thumb which is more 

 or less opposable to the fingers, although very imperfectly 

 so in the American forms. The thumbs of the marmosets, 



