VIII ORIGIN AND USES OF COLOUR IN ANIMALS 231 



be required by the subject of sexual differentiation of colour 

 and ornament, as to the origin and meaning of which I have 

 arrived at different conclusions from Mr. Darwin. These vari- 

 ous forms of coloration having been discussed and illustrated, 

 we shall be in a position to attempt a brief sketch of the funda- 

 mental laAvs which have determined the general coloration of 

 the animal world. 



