418 I,AWS OF MULTIPLICATION. 



SO extremely contrasted in their degrees of evolution, and so 

 extremely contrasted in their rates of multiplication, that the 

 law of relation between these characters becomes unmis- 

 takable when the evidence is looked at in its ensemble. This 

 we shall soon find on ranging in order a number of typical 

 cases. 



In doing this it will be convenient to neglect, temporarily, 

 all unlikenesses among the circumstances in which organ- 

 isms are placed. At the outset, we will turn our attention 

 wholly to the antagonism displayed between the integrative 

 process which results in individual evolution and the disinte- 

 grative process which results in multiplication of individuals ; 

 and this we will consider first as we see it under the several 

 forms of agamogenesis, and then as we see it under the seve- 

 ral forme of gamogenesis. We will next look at the anta- 

 gonism between propagation and that evolution which is 

 shown by increased complexity. And then Ave will consider 

 the remaining phase of the antagonism, as it exists between 

 the degree of fertility and the degree of evolution exjjressed 

 by activity. 



Afterwards, passing to the varying relations between 

 organisms and their environments, we will note how relative 

 increase in the supply of food, or relative decrease in the 

 quantity of force expended by the individual, entails relative 

 increase in the quantitj' of force devoted to multiplication, 

 and vice versd. 



Certain minor qualifications, together with sundry impor- 

 tant corollaries, may then be entered upon. 



