Maturity. 1 79 



The female is less profoundly affected by repro- 

 ductive development, because the life at the gen- 

 erative centres is more calm, more gentle, more 

 conservative ; less generative material is produced, 

 and little is lost. 



If the reproductive cells, for any reason, fail to 

 develop, the result is interesting. If the ovaries be 

 removed, for instance, there is no characteristic 

 feminine development. 



If, from a similar cause, the sperm-cells are pre- 

 vented from forming, there is no distinctive mascu- 

 line evolution. 



The female, undeterred by the restraining femi- 

 nine reserve, develops more actively in those tis- 

 sues most inclined to activity, the skin and its out- 

 growths, and so approaches more nearly to the 

 male type; while the male, unable to exercise his 

 powerful masculine activity, approaches toward 

 the female type, the two meeting, as it were, on a 

 common neutral plane. 



As might be expected, the vigor of the male 

 body is most affected by this loss of reproductive 

 power. 



If the sperm-cells are forbidden to form in the 

 first place, there will be no development of mascu- 

 line characteristics. And even after the full mas- 

 culine power has been developed the continuing 

 presence of the sperm-cells is necessary to pre- 

 serve the vigor and masculinity of the creature. 



The presence of the fertilizing fluid within the 



