358 BACKBONED ANIMALS. 
Sub-order II. Man-shaped Animals (Axnthropoidea). 
Marmosets (Hafalide).—The marmosets are confined 
exclusively to South America, and are rarely larger than 
large squirrels. They have long, non-prehensile tails, and 
walk upon all-fours, the feet and hands being similar, and 
the digits armed, with the exception of the great toes, with 
nail-like claws. As the thumbs are not opposable, they 
can not grasp with the facility of other monkeys, 
WSK 
Fic. 378.—A woolly monkey and young (Lagothryx Humboldti?), showing 
grasping tail. 
Weepers (Ceéidz).—In this large family we first meet 
the true monkeys, the family embracing all the South 
American forms. They are distinguished by the posses- 
sion of more molar teeth than those that follow, having in 
all thirty-six teeth, while the rest have only thirty-two. 
Many also possess a long, prehensile tail of so much use 
