CHANGES IN CELL-ORGANS OF DROSERA ROTUNDIFOLIA. 413 
it, or sometimes rather bluer, but is sharply defined by its 
dark blue periphery. 
The Nuclear Chromosomes are as in unfed specimens. 
The Nuclear Plasm is less distinctly granular, though as 
dense as in unfed specimens. 
The Nucleolus is deep purple-red, and is surrounded by 
Frommann’s zone. The endonucleoli are not distinct. 
Effect of Stimulation for Five Minutes on the 
Lateral Superficial Gland-cells. Fig. 16. 
The Cell Wall is pale pinkish purple in the specimen figured. 
In other specimens more densely surrounded by the albumen 
used as food, the external walls, and the upper part of the 
lateral walls are very red. 
The Cytoplasm has apparently not diminished in mass, or 
only slightly so. Its coloration is as in apical cells of this 
stage. A blue ‘‘ corpuscle ” is frequently present. 
The Nucleus is normal as to position, size, and shape; but 
its blue periphery is more or less irregular. 
The Nuclear Chromosomes are like those of the apical cells, 
appearing as large, conspicuous, generally distinctly double 
granules. 
The Nuclear Plasm in general arrangement is as in unfed 
specimens. In some cases it is slightly less dense. Its colour 
is like that of the surrounding cytoplasm. 
The Nucleolus is unchanged from the one-minute stage. 
Effect of Stimulations for Ten to Twenty Minutes on 
the Lateral Superficial Gland-cells. Fig. 17. 
The Cell Wall, as in the last case, stains either pale purple 
or red. In the specimen chosen the walls are pale purple. 
The Cytoplasm is in general aspect, bulk, distribution, and 
coloration similar to that seen in specimens fed for shorter 
periods, 
The Nucleus and Nuclear Chromosomes show no change 
since the stage last described. 
