45 



(3) Are always and only displayed in perfection 



during courtship. 



(4) Often appear to have the desired effect. 



/. Wallace's objections (See Tropical Nature). 



(i) Theory can only apply to the more intelli- 

 gent animals. 



(2) Brilliancy of males due to lack of need of 



protection, absence of selection. 



(3) Brilliancy of males correlated with greater 



vigor, therefore preserved by natural se- 

 lection. 



(4) No evidence of females being affected by 



display. 



(5) Display merely due to general excitement. 



(6) Sexual selection nullified by natural selec- 



tion. 



(7) Every bird finds a mate sooner or later. 



(8) Impossibility of uniformity of taste in all 



females of a species. 



g. Romanes's reply. 



(i) Pattern of colors cannot be due to vigor, 

 e. g. Peacock, Angus phaesant. 



(2) Remarkable elaboration of structures, e. g, 



the Bell-bird. 



(3) Objection 7 begs the question. 



(4) Decorative (as distinguished from brilliant) 



coloring, melodious song (as distinguished 

 from cries), arborescent antlers (as dis- 

 guished from merely offensive weapons), 

 and the Hke, cannot be explained by nat- 

 ural selection. 



