﻿1903] OOGENESIS IN SAPROLEGNIA 249 



plasmic centers around which the process of segmentation might 

 proceed, in the hope that light would be thrown upon the 

 problem of the coenocentrum, but the examination brought 

 forth no evidence of such structures in the sporangium. The 

 nuclei themselves seem to be the ultimate centers of segmenta- 

 tion. The coenocentrum, therefore, so far as we know, is a 

 structure peculiar to the oogonium. 



\To be conchided,'] 





