XVII OTHER SOUTH AMERICAN MONKEYS 557 
referred to, and the Monkey, originally described by the traveller 
von Humboldt, is said to have “the appearance of a diminutive 
hon.” JM. bicolor is an example of the species with no mane, 
but with a patch of white round the mouth, looking like “a ball 
of snow-white cotton” held in the teeth. 
Fam. 2. Cebidae.—The remaining American Monkeys are 
comprised in the family Cebidae. This is to be distinguished 
from the last by the fact that there is an additional molar, thus 
making thirty-six teeth in all. The tail, sometimes very short, 
is more generally long and highly prehensile, being nude at the 
extremity, which part is therefore especially prehensile; this 
state of affairs is often to be seen in animals with prehensile 
tails. The Cebidae, though for the most. part larger than the 
Marmosets, never approach in size the Old-World Apes. 
Typical of the family is the genus Cebus, including the 
“Capuchin” Monkeys, and consisting of nearly twenty species ; 
the tail, though prehensile, is covered with hair to the tip, a fact 
which is indicative of a less perfect prehensility than is exhibited 
in some Monkeys with a naked under surface to the tip of the 
tail, The thumb is well developed. The genus ranges from 
Costa Rica to Paraguay. The commonest Monkey which accom- 
panies the street organs of this country is a Cebus. It is a 
popular delusion that these and other monkeys are purely 
vegetable-feeding animals. Cebus is in fact particularly fond of 
caterpillars, as are also the Marmosets. 
Allied to Cebus is Lagothriz, the Woolly Monkey, of which 
L. humboldti is the best-known species, there being indeed but 
one other. It is a larger and heavier animal than any species of 
Cebus; and the Hare-like woolliness of the fur suggested its 
scientific name to its original describer, von Humboldt. It has 
a perfectly prehensile tail, naked at the tip. The thumb and 
great toe are well developed. These are purely fruit-eating 
Monkeys, and are known as “ Barrigudos” by the Portuguese of 
the Amazon country on account of their prominent belly, due 
apparently to the immense amount of fruit consumed. They are, 
or were, much eaten by natives. 
Brachyteles is a little-known genus, connecting the last with 
the next genus. The under fur is woolly; the thumb is small 
or absent. The tail is naked below. 
The Spider monkeys, Ate/es or Coaitas, have been described as 
