CHANGES IN CELL-ORGANS OF DROSERA ROTUNDIFOLIA. 409 
nuclei they are brought very close together, and help to give 
the nucleus a dark purple appearance. 
The Nuclear Plasm is red. It is vacuolated in the un- 
shrunken nuclei. It is dense purple-red in the shrunken 
nuclei, which are therefore much darker than the cytoplasm. 
The Nucleolus is pale red, inconspicuous, sometimes very 
small in the unshrunken nuclei. It is undiscernible in the 
nuclei that have shrunken. Endonucleoli are indistinguish- 
able, owing to the paleness and transparent appearance of the 
nucleoli. = - 
Fig. 98 is a nucleus from an apical gland-cell of a leaf that 
had been fed with yolk of boiled egg, and which after thirty 
hours was fixed in Mann’s picro-corrosive alcohol. It is re- 
markable for the large size of the chromosomes, which seem 
to be approximately V-shaped. It is also remarkable for the 
absence of nuclear plasm. The cytoplasm is in the same con- 
dition as is shown in figs. 9 and 10. 
In those experiments where pieces of cork were laid on the 
leaves to produce stimulation, complete exhaustion of the cell, 
similar to fig. 10, resulted as regards the cytoplasm; while the 
nucleus, although shrivelled and shrunken, stained a pure red, 
there being not a trace of blue colour in the chromosomes. 
This peculiar behaviour of the chromatin segments I have also 
seen, though not frequently, in leaves which had been fed 
twenty to thirty hours previously with egg-albumen. I men- 
tion this fact because there may be some analogy between this 
affinity for red dyes as seen here, and also met with during the 
middle period of mitosis—a view which seems to be supported 
by figs. 9a and B, where one of the features of mitosis is re- 
produced. 
The Apical Gland-cells Two to Three Days after 
Feeding (the Leaf beginning to reopen). Fig. 11. 
The Cell Wall is pale blue. 
The Cytoplasm shows the usual general retraction and basal 
attachments. It is extremely dense and granular round the 
nucleus, forming a well-defined zone which occupies the middle 
