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ZOOLOGICAL EXERCISES. 
Rodentia. Two long incisors in each jaw; no 
canines ; clavicle rudimentary. 
Chiroptera. Digits of the fore limbs pro- 
longed, and connected by a membrane—the 
patagium; clavicles strong; prosternum keeled; 
ulna rudimentary. 
Insectivora. Three kinds of teeth; incisors 
and canines short; five toes, furnished with 
claws ; clavicle well developed. 
Quadrumana. Hallux, opposable to the other 
digits ; clavicles well developed. 
The order is thus divided : 
Lemuroidea or Prosimic. Nostrils twisted ; 
six incisors in each jaw; second digit of the 
foot with a claw. Includes the lemurs. 
Simioidea. Nostrils straight; four incisors in 
each jaw; all the digits with flat nails. 
Platyrrhina. Nostrils wide apart; thumbs 
absent, or not opposable to the other digits ; 
six premolars in each jaw; tail prehensile. 
Includes the monkeys of America. 
Catarrhina. Nostrils close together ; thumbs 
opposable to the other digits ; four preemolars 
in each jaw; tail not prehensile. Includes 
monkeys and apes of Asia and Africa. They 
are divided into— 
Monkeys. Tail generally long; cheek pouches, 
and natal callosities : muzzle short. 
Basoons. Tail short; muzzle long; cheek 
pouches and natal callosities. 
ANTHROPOID APES. Tail none; no cheek 
