TAILS AND CHEEK POUCHES 



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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