BEAUTY OF THE QUADRUMANA. 



545 



equally, to both sexes. With many of the Quadrumana, we have 

 additional evidence of the action of sexual selection in the greater 

 size and strength of the males, and in the greater development of 

 their canine teeth, in comparison with the females. 



Pig. W. Cereopithecus petaurista (from Brehm). 

 A few instances will suffice of the strange manner in which 

 both sexes of some species are colored, and of the beauty of others. 

 The face of the Cereopithecus petaurista (fig. 77) is black, the 

 36 



