Habits and Instincts of the Pairing Season. 231 



act of pairing would be correlated with the expression 

 of sexual emotion through certain specialized activities ; 

 and those individuals which were not expressive, together 

 with those which were insensible to the suggestive influence 

 of expression, would be less ready to mate and to transmit 

 the specialized modes of expression. In all these matters 

 further and fuller evidence from direct observation is to 

 be desired. 



