CHANGES IN CELL-ORGANS OF DROSERA ROTUNDIFOLIA. 401 
APICAL GLAND-CELLS. 
The Resting State as seen in Unfed Leaves used 
as Controls. Fig. 1, Plate 23. 
The Cell Wall stains pale blue. The free wall of the cell by 
shrinkage has sometimes become slightly concave, but other- 
wise appears turgid. 
The Cytoplasm has retracted from the cell walls except in 
the lower basal third, where it either remains entirely in con- 
tact with the cell wall, or is attached to it by strands, which 
are in line with similar strands in neighbouring cells. The 
general appearance is suggestive of communication in this 
region between the apical gland-cells themselves, and also 
between them and the cells of the second layer. The cyto- 
plasm is apparently homogeneous, and arranged in a foam-like 
manner. It stains pure blue, and contains a coarse granula- 
tion embedded in it which stains a deeper blue, and represents 
some zymogen. The constant position of the nucleus is just 
below the middle of the cell, and the cytoplasm between it and 
the outer wall is generally densest in the middle third, being 
more vacuolated towards the free surface and in the imme- 
diate vicinity of the nucleus. Surrounding the nucleus, and 
partly hiding this looser arrangement, is a more finely granular 
mass of protoplasm which often shows a slight affinity for the 
red stain. This zone gradually merges over into the general 
plasm, but shows a number of distinct radiations passing both 
outwards from the nucleus and towards the basal attachment 
of the cell. The plasm, where retracted from the cell wall, 
sometimes shows minute dark blue granules, which frequently 
also occur on the margins of the vacuoles. Compared with 
the lateral cells of the outer layer and with the cells of the 
second layer, the cytoplasm of the apical gland-cells is much 
deeper in colour, because of its greater abundance in these 
cells. 
The Nucleus is situated just below the middle of the cell. 
It may be spherical or oval. 
The nuclei vary in size, being generally smaller in the cells 
