CHANGES IN CELL-ORGANS OF DROSERA ROTUNDIFOLIA. 415 
The Nuclear Chromosomes appear as a few large segments. 
They are fewer and larger than those of the apical gland-cells. 
They stain a pure deep blue. 
The Nuclear Plasm is very scanty, and of the same tint as 
the cytoplasm, but large white spaces occupy most of the 
interior of the nucleus, which has therefore a washed-out, 
empty appearance. 
The Nucleolus is small. 
Notr.—It seems as if the lateral superficial cells and the 
cells of the second layer in this case were in advance of the 
apical cells; for the collection of the chromatin into a few 
large segments, and the vacuolation of the nucleus, are cha- 
racteristic of more advanced stages of glandular activity. 
Effect of Stimulation for One to Four Hours on the 
Lateral Superficial Gland-cells. Fig. 20. 
The Cell Wall is pale blue. 
The Cytoplasm is red, shading to a bluer tint towards the 
periphery of the cell. The red colour is deepest close to the 
nucleus, but there are no such well-defined masses of red 
material as are seen in the apical cells of the same gland 
(fig. 7). A blue “corpuscle” is sometimes present. 
The Nucleus, Nuclear Chromatin, and Nuclear Plasm are 
the same as in the apical cells. 
The Nucleolus is srnall, and also indistinct because it re- 
sembles in colour the surrounding nuclear-plasm. Fig. 20 
may be an earlier stage than fig. 19, because the nuclear 
chromosomes have not as yet aggregated into eight big seg- 
ments. 
Effect of Stimulation for Twenty to Thirty Hours 
on the Lateral Superficial Gland-cells. Figs. 21 
and 22. 
The Cell Wall is pale blue. 
The Cytoplasm is as in the apical Cells. 
The Nucleus is represented by the two types found in the 
