IUAULS) UNI) (CENBIBIRS TROUBLES 
thropoid apes. But both of these divisions have the 
catarrhine physiognomy with narrow nostrils, and 
possess the little spout-like process spoken of as absent 
in the Platyrrhines. The Catarrhines pure and simple 
(excluding, that is to say, the anthropoids) never have 
a prehensile tail, and are occasionally without a tail 
at all; they have, as a rule, cheek.pouches. They have 
only thirty-two teeth, while the Platyrrhines have 
thirty-six, with the exception of the marmosets ; these 
however, have the thirty-two, which they possess in 
common with the old Catarrhines, rather differently 
arranged. Instead of there being two premolars and 
three molars on each side of each jaw, there are three 
premolars and two molars in the marmosets. 
The great man-like apes have no tail; they have not 
any cheek pouches; finally, they possess in common 
with man the doubtful advantage of a vermiform 
appendix, a structure which Nature has fortunately, 
as it appears for them, denied to any other group of 
monkeys. They have, however, the same thirty-two 
teeth of the Catarrhines. 
THE CHIMPANZEE AND THE GORILLA 
It may seem unnecessary to bracket together these 
two anthropoid apes. But the fact is that they have 
been not unfrequently mistaken the one for the other ; 
and in any case they are near akin, and both are in- 
habitants of tropical Africa. We shall see, however, 
presently that there is no particular reason for confusing 
them, at any rate in the living condition. As to the 
chimpanzee, the difficulty in writing about it is to limit 
the account. Probably no animal, at any rate of late 
years, has been so much written about. Paragraphs 
and articles relating to the defunct Sally of the Zoo 
would fill many goodly volumes ; while the more recent 
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