CHANGES IN CELL-ORGANS OF DROSERA ROTUNDIFOLIA. 423 
Cells of the Third Glandular Layer Seven Days 
after Feeding. Fig. 35. 
The Cell Wall is pale blue. 
The Cytoplasm is pale blue and somewhat granular, as it is 
in leaves that have never been fed. 
The Nucleus is spindle-shaped in some tentacles, but not 
drawn out at the ends into such fine acicular points as in con- 
trols. The spindle-shaped nuclei are coloured blue like those 
of controls. Nuclei like fig. 34 are also common. 
The Nuclear Chromosomes are exactly as in specimens that 
have never been fed. 
The Nuclear Plasm consists of blue granules like those of 
control specimens, arranged in moniliform rows. In some 
nuclei the appearance is most suggestive of a spiral arrange- 
ment of these chains of granules round the nucleolus. 
The Nucleolus is large and deep red as in controls, with 
clear endonucleoli, and surrounded by Frommann’s clear 
zone. 
In general appearance the cells, as a whole, are very lke 
those in the control specimens. 
SUMMARY AND ConcLUDING REMARKS. 
As the result of an appropriate stimulation of the gland- 
cells of Drosera by food, it is seen that the basophile cytoplasm 
becomes used up, and is represented ultimately by a very 
scanty eosinophilous plasm. The restoration of the cytoplasm 
is brought about by the nucleus absorbing food material, 
metabolising it, and then excreting it into the cytoplasm, as is 
proved by— 
(1) The great increase in the bulk of the basophile nuclear 
chromosomes during a period preceding the restoration of the 
cytoplasm. 
(2) The scanty amount of eosinophilous nucleolar chro- 
matin, and small size of the nucleolar organ during the same 
period. 
(3) By the neutrophile cytoplasm first appearing immedi- 
