vii r 
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, 
w r e shall be in a position to attempt a brief sketch of the funda¬ 
mental laws which have determined the general coloration of 
the animal w'orld. 
