888 LILY HUIE. 
the kindness of Professor Gotch I have been permitted to 
work in the Histological Department of the Physiological 
Laboratory at Oxford, under the guidance of Dr. Mann. 
LITERATURE. 
Numerous as have been the papers published on the Dro- 
seracee since Charles Darwin’s classical treatise upon ‘ In- 
sectivorous Plants,’ comparatively few have dealt with 
cytological changes induced by functional activity of the 
glands; and these few have been mainly devoted to the obser- 
vation and elucidation of the “Phenomenon of Aggregation 
of Protoplasm,” a term applied by Darwin! to the following 
phenomena : 
“Tf a tentacle is examined some hours after the gland has 
been excited, . . . . the cells instead of being filled with 
homogeneous purple fluid, now contain variously shaped 
masses of purple matter, suspended in a colourless or almost 
colourless fluid. The little masses of aggregated matter are 
of the most diversified shapes, often spherical or oval, some- 
times much elongated,&c. . . . These little masses inces- 
santly change their forms and positions, being never at rest. 
A single mass will often separate into two, which afterwards 
reunite. Their movements are rather slow, and resemble 
those of amcebe or of the white corpuscles of the blood. We 
may, therefore, conclude that they consist of protoplasm.” 
Cohn, in his review of ‘ Insectivorous Plants, 2 threw 
doubts upon Darwin’s inference that the aggregated masses 
consisted of protoplasm, and called them ‘ Zusammenbal- 
lungen” of the red-cell sap. 
Francis Darwin,® who studied the phenomenon in the cells 
of the stalks of the tentacles, reasserted the view of his father 
1 *Tnsectivorous Plants,’ London, 1875, p. 39. 
2 * Deutsche Rundschau,’ 1876. 
3 Darwin, F., “On the Process of Aggregation in the Tentacles of 
Drosera rotundifolia,” ‘Quart. Journ. Micr, Sci,’ 
