532 



The Descent of Man. 



Pabt II. 



monkeys attack each other by the throat; but it is not probable 

 that the beard has been developed for a distinct purpose from 

 that served by the whiskers, moustache, and other lufts of hair 

 on the face; and no one will suppose that these are useful as a 

 protection. Must we attribute all these appendages of hair or 

 skin to mere purposeless variabjlity in the male '>. It cannot be 

 denied that this is possible; for in many domesticated quad- 

 rupeds, certaia obaracters, apparently not derived through re- 

 version from any wild pareni-form, are contined to the males. 



-^\ 





Fig, 68. 



Pithecia satanas, male (from Brehni). 



or are more developed in them than in the females — for instance, 

 the hump on the male zebti-cattle of India, the tail of fat-tailed 

 rams, the arched outline of the forehead in the males of several 

 breeds of sheep, and, lastly, the mane, the long hairs on the 

 hind-legs, and the dewlap of the male of the Berbura goat." The 

 mane, which occurs only in the rams of an African breed of 



'^ See the chapters 

 several animals in vol. 



on these 

 i. of my 



* Variation of Animals under Domos- 

 tication ; ' also vol. ii. p. 73 ; also 



