io8 Life and Love. 



In the fishes we usually find the adult female 

 larger and fuller than the male; this is also the 

 case with insects and with many birds, as well as 

 with other forms of life. Among mammals the 

 adult male is generally the larger, this probably 

 being due to secondary causes, which have oper- 

 ated to produce a more powerful male, that being 

 the form best suited to the circumstances in which 

 the animal lived. 



Everywhere in life, from lowest to highest, the 

 male tends to vary more than the female. 



And as a rule the male is everywhere more 

 active than the female. 



Of course there are individuals which afford ap- 

 parent exceptions to any rule, and there are indi- 

 vidual females more active than individual males; 

 but, taken as a class, the propositions laid down are 

 true, and though one female may be more active 

 than a certain male, she probably is not as active 

 as the most active male of her species. 



It is never safe to draw ilkistrations from the 

 comparison of individuals, as life is so complex 

 and so varied that truth apparently exists in all 

 degrees of completeness, and can only be arrived 

 at by much careful examination. 



As maturity approaches, the most obvious 

 changes are often those that take place in the skin 

 and its appendages ; and although the skin shows 

 great power of variation in both sexes, it usually 

 varies most markedly in the male. The powerful 



