CORRELATION OF INTERNAL SECRETIONS 109 



"the more important and deathless fission products of interdepend- 

 "the unicellular egg". 



Whatever views we may hold as to details I question reproductive 



, ., . . . metabolism. 



whether this philosophical statement is open to con- 

 tradiction. The function of reproduction in all its 

 preparations and performances commences in the early 

 stages of segmentation, and may be said to continue 

 in Man until the care of the offspring is completed ; but 

 in many lower forms of life, male and female, the act 

 of reproduction is also the cause of death. 



