204 ALLEN’S NATURALIST’S LIBRARY. 
THE CAPUCHINS AND SPIDER-MONKEYS. 
SUB-FAMILY CEBINA. 
We now come to describe the remaining Monkeys of the New 
World. The Ceésnr@ are characterised by having the incisors 
vertical, not procumbent ; they have no inflated hyoid bone as 
in the foregoing Sub-family. The tail in all is long and pre- 
hensile, although in some species it is a less perfect grasping 
organ, being clothed with hair to the tip, instead of being 
there naked and highly sensitive. ‘The thumb may be present 
or absent. 
This Sub-family contains four genera: the Capuchins (Cedws); 
The Woolly Monkeys (Zagothrix); the Woolly Spider-Monkeys 
(Eriodes); and the Spider-Monkeys (4/Ze/es). The’ species 
belonging to these genera are very numerous, and are found 
over the whole region from Mexico in the north, to Paraguay 
and Bolivia in the south, or from about 25° N. lat., to 30° 
S. lat. 
THE CAPUCHINS. -GENUS CEBUS. 
Cebus, Erxleb., Syst. Regne Anim., p. 44 (1777). 
This is the typical genus of the American Monkeys. They 
are distinguished by having a robust body, covered with woolly 
fur, with a rounded head and a face which, instead of having a 
protruding muzzle, is more erect and Man-like. They are the 
commonest Monkeys seen in captivity in our streets. Their 
tail is long and covered with hair to the tip, and, though pre- 
hensile, it is not the perfect substitute for an additional hand 
noticed in several other genera. Their limbs are only 
moderately long, and are less slender than in the Spider- 
Monkeys. The fore-limbs have a well-developed thumb, 
which, as compared with the length of the hand, is the most 
