THE COLORATION OF REEF FISHES 597 



sexual selection, at least in so far as they may ever have been 

 supposed to apply to these forms. Upon the contrary, they 

 confirm Thayer's conclusions regarding the obliterative function 

 of color and pattern, emphasize the common occurrence of 

 adaptive characters among animals, and suggest that their 

 evolution has been guided throughout by natural selection. 



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