Masterpieces of Science 



which sexual selection apparently has acted, on 

 man, both on the male and female side, causing 

 the two sexes of man to differ in body and mind, 

 and the several races to differ from each other in 

 various characters, as well as from their ancient 

 and lowly organized progenitors. 



He who admits the principle of sexual selection 

 will be led to the remarkable conclusion that the 

 cerebral system not only regulates most of the 

 existing functions of the body, but has indirectly 

 influenced the progressive development of various 

 bodily structures and of certain mental qualities. 

 Courage, pugnacity, perseverance, strength and 

 size of body, weapons of all kinds, musical organs, 

 both vocal and instrumental, bright colours, 

 stripes and marks, and ornamental appendages, 

 have all been indirectly gained- by the one sex 

 or the other, through the influence of love and 

 jealousy, through the appreciation of the beauti- 

 ful in sound, colour or form, and through the 

 exertion of a choice ; and those powers of the mind 

 manifestly depend on the development of the 

 cerebral system. 



Man scans with scrupulous care the character 

 and pedigree of his horses, cattle and dogs before 

 he matches them ; but when he comes to his own 

 marriage he rarely, or never takes any such care. 

 He is impelled by nearly the same motives as 

 the lower animals when left to their own free 

 choice, though he is in so far superior to them 

 that he highly values mental charms and virtues. 

 On the other hand he is strongly attracted by 

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