ESTHETIC FA CUL TIES. 29 



hensively without the aid of a factor which is 

 clearly unnecessary in the case of the more 

 intelligent of the social insects ? 



ESTHETIC FACULTIES. 



The modern development of music and harmony 

 (p. 19) is undeniable, but why could it only 

 have been brought about by the help of the 

 inheritance of th~ effects of use ? Why are 

 we to suppose that "minor traits" such as the 

 " aesthetic perceptions " cannot have been evolved 

 by natural selection (p. 20) or by sexual selec- 

 tion ? Darwin holds that our musical faculties 

 were developed by sexual preference long before 

 the acquisition of speech. He believes that the 

 " rhythms and cadences of oratory are derived 

 from previously developed musical powers " a 

 conclusion " exactly opposite " to that arrived at 



