146 ARCHEGONIATES, 
from the generative cell. To this phase of development Ikeno has 
applied the term spermatogenesis, 
As soon as all the structures mentioned accumulate in the proximal 
end of the tube, all save the generative cell begin to disorganize and 
finally disappear. What this disorganization signifies, Ikeno remarks, 
Fic. 58.—Division of generative cell and further development of blepharoplasts in Cycas 
revoluta.—(After Ikeno.) 
A, generative cell with nucleus in early prophase of division ; chromatin scattered in masses of. granules. 
B, same with nucleus in late anaphase; each blepharoplast has separated into a mass of rods from 
which radiations extend; they have nothing whatever to do with mitotic spindle. 
C, blepharoplast of B more highly magnified. 
D, cell-division is about complete ; the radiations have nearly disappeared from the mass of granules 
composing blepharoplast. 
E, two spermatozoid mother-cells, the one on the right in outline; the ciliated blepharoplast has made 
one turn about the cell; nuclear beak is in connection with ciliated band. 
is an open question, but it seems that all of the disorganized elements 
contribute to the nourishment of the generative cell. 
The cytoplasm of the generative cell now assumes a coarse, net-like 
structure, and the nucleus divides (Fig. 58, A, B). The details of 
this division will not be dwelt upon further than to state that the 
mitotic spindle arises without the intervention of the centrosphere-like 
