Chap. XVIII. Beauty of the Quadriimana. 



549 



Quadrumana. — Before we conclude, it will be well to add a 

 few remarks on the ornaments of monkeys. In most of the 

 species the sexes resemble each other in colour, but in some, as we 

 have seen, the males differ from the females, especially in the 

 colour of the naked parts of the skin, in the development of the 

 beard, whiskers, and mane. Many species are coloured either in 

 so extraordinary or so beautiful a manner, and are furnished 

 with such curious and elegant crests of hair, that we can hardly 

 avoid looking at these characters as having been gained for the 

 sake of ornament. The accompanying figures (figs. 72 to 76) 



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^$^i^*> 





Fig. 73. Head of Semnopithecus comatus. 



Fig. 74. Head o\ Cebus capucinus. 



Fig. 75. Head of Ateles marginatus. 



Fig. 70. Ilead of Cebus vellerosus. 



serve to shew the arrangement of the hair on the face and head 

 in several species. It is scarcely conceivable that these crests of 

 hair, and the strongly contrasted colours of the fur and skin, can 

 be the result of mere variability without the aid of selection ; 



