CHANGES IN CELL-ORGANS OF DROSERA ROTUNDIFOLIA. 419 
nuclei of the other gland-cells. This is the general rule; but 
in leaves taken in autumn the nuclei of this layer occasionally 
correspond in tint with those of the other gland-cells. 
The Nucleolus.:—There is one large nucleolus, or two smaller 
ones. They stain deep red, and contain one or more distinct 
endonucleoli. 
Effect of Stimulation for One Minute on the Cells of 
the Third Glandular Layer. Type 1. Fig. 26a, 
Nucleus seen in longitudinal section; Fig. 26B, 
in transverse section. 
The Cell Wall is pale purple; deeper in tint and bluer on the 
side next the tracheids. 
The Cytoplasm is as in unfed specimens, except that it stains 
pinkish purple. The occasional presence of a blue ‘‘corpuscle” 
is doubtful. 
The Nucleus is normal as to position and size. It shows no 
alteration in shape, except that it is slightly less pointed at the 
ends. Its general tint is pinkish purple; and it shows more 
affinity for the red stain than the majority of the nuclei of the 
other gland-cells. 
Nuclear Chromosomes are as in unfed specimens. 
The Nuclear Plasm is of a reddish-purple tint. It is dis- 
tinctly granular, and is arranged in an open network in the 
meshes of which is a pale purple homogeneous substance. 
The Nucleolus is dark purple-red. The endonucleoli are 
indistinct or absent. 
Effect of Stimulation for One Minute on the Cells 
of the Third Glandular Layer. Type2. Fig. 27. 
The Cell Wall stains pale blue-purple, showing a much bluer 
tint than the walls of the other gland-cells. 
The Cytoplasm is pale pink, but otherwise is like that of 
unfed specimens. There is no blue “corpuscle” present. 
The Nucleus is normal as to position and size. It is less 
finely pointed at the extremities than in controls. It exhibits 
VOL. 389, PART 4.—NEW SER. aa 
