MAN AND APES. 
121 
Another group of monkeys, the Sakis, is interesting from 
peculiarities in the hairy clothing. The tail may be long or 
short, ^ but is never prehensile. They form the genera 
Pitheda and Brachyurus, 
Fig. 6. 
A Spider Monkey (Ateles). 
Fig. 7. 
A bearded Saki (Pithecia).^ 
The little Squirrel Monkey, {Chrysothrix) (Plate XCV. 
fig. 3), is a singularly attractive and beautiful little animal. 
Two allied genera are called respectively Callithrix and 
Nyctipithecus, 
