152 ARCHEGONIATES., 
the nucleus, but, in a number of cases in this stage and in a still later 
stage, they have been found nearer together, frequently less than 45° 
apart.” 
The first indication of a differentiation in the blepharoplast as it 
increases in size is seen in the formation of an outer wall or membrane, 
The generative cell, which has remained nearly spherical, increases in 
Fie. 61.—Prothailium and a dividing generative cell of Zaweza,—(After Webber.) 
A, prothallium in which generative cell has become large and elongated; the blepharoplasts have taken 
positions on opposite sides of nucleus, corresponding to longitudinal axis of pollen tube; starch 
grains have begun to appear in stalk cell. 
B, division of generative cell, nucleus in anaphase, showing hyaline cytoplasmic areas around poles ; 
the blepharoplasts, whose outer membranes have separated into pieces or segments, are not con- 
nected with spindle. 
size and becomes elliptical or oblong, its major axis nearly coinciding 
with the longitudinal axis of the pollen tube (Fig. 61, A). The 
blepharoplasts by this time have taken a position on opposite sides of 
the nucleus on the line of the major axis of the cell. The kinoplasmic 
radiations are slightly more prominent than the lamelle or fibrille of 
the cytoplasmic reticulum into which they run and disappear (Fig. 61, A). 
