424 LILY HUIE. 
ately round the nucleus; and this extra-nuclear plasm cor- 
responding in colour reactions (chemically) and in size of 
granules (morphologically) with the intra-nuclear plasm. 
(4) By the diminution of the nuclear chromatin, and in- 
crease in the amount of nucleolar chromatin, whenever the 
cytoplasm has been restored. 
That the extra-nuclear plasm undergoes a further change on 
its own account seems to be proved by the purple colour 
gradually being changed into blue. 
Whether the nuclear or the nucleolar chromatin is the 
primary product of metabolism; whether they are formed 
simultaneously by the nuclear or nucleolar organs respectively ; 
whether the one or the other plays the part of a ferment- 
secreting organ in relation to nuclear metabolism, are questions 
only to be answered after further investigation. 
The aggregation of the nuclear chromatin into a definite 
number of V-shaped segments—eight in Drosera—proves that 
such a change is not a feature characteristic of mitosis, but 
simply a sign of great activity in the nuclear organs. 
I intend continuing my research on Drosera with the view 
of determining whether food materials which differ chemically 
will produce characteristic changes in the gland-cells. 
DESCRIPTION OF PLATES 23 and 24, 
Illustrating Lily Huie’s paper, “ Changes in the Cell-organs 
of Drosera rotundifolia produced by feeding with 
Egg-albumen.”’ 
All the figures were drawn with Zeiss’s camera lucida, Zeiss’s 3, apochro- 
matic oil immersion objective, and No. 8 compensating ocular. The tube 
of the microscope was drawn out to its full extent, and the drawing-paper was 
laid on the table. The figures of the lateral superficial cells, and those of 
the cells of the third glandular layer, were almost invariably taken from the 
same gland, as the corresponding figures of the apical gland.-cells, 
