THEORY OF REPRODUCTION. 



237 



katabolic character. And thus the opposition between nutri- 

 tion, which, after hfe and death, is the most obvious antithesis 

 in nature, admits of being more precisely restated in the thesis, 

 that as a continued surplus of anaboHsm involves growth, so a 

 relative preponderance of katabolism necessitates reproduction. 

 Or this may be summed up once more in our fundamental 

 diagrams : — 



SUM OF FUNCTIONS. 



Nutrition. Reproduction. 



Anabolism. Katabolism. Female. Male. 



