No. 449 ] STUDIES ON THE PLANT CELL. 385 



structure. It is probably the morphological expression of a 

 dynamic center in the egg. Coenocentra have been known for 

 several years and have been given especial attention in the 

 recent investigations of Stevens, '99 and '01, and the author 

 (Davis, :03). They will be further considered in our account ot 

 Coenogametes (Section III). 



Nematoplasts are exceedingly small rod or thread like 



