10 VITTROCK, SPORES OF THE MESOCARPEZ. 
coloured, rather thick band of protoplasm — the single!) 
chlorophyllaceous body of the cell — which runs through 
the whole length of the cell and which is most frequently 
more or less excavated at both ends of the cell (see figs. 1 
and 2); in the band of chlorophyll occur the so-called amylon- 
kernels (»Amylonkerne» DE BaArY) in a number of 2—4; 
3:0 a rounded nucleus, which has its place at the side of 
the chlorophyllaceous body or very often in a small circular 
opening in the middle part of the band of chlorophyll (see 
fig. 1 n); 4:o small drops of oil, attached partly to the inner 
side of the parietal layer of protoplasm and partly to the 
outer side of the chlorophyllaceous band, and 5:o colourless 
cell-liquid, which fills the vacuoles between the parietal layer 
of protoplasm and the axile chlorophyllaceous band. 
Among the different constituent parts of the contents of 
the cell in this plant, the chlorophyllaceous body is of espe- 
cial interest. In purely vegetative cells the chlorophyllaceous 
body is found to possess the power of making free and rather 
quick movements. In the series of cells for instance which 
[ have represented fig. 3 (in such a position that the chloro- 
phyllaceous bands of the cells are seen in side-view), the 
chlorophyllaceous bands were, when I began to copy them 
with the assistance of the camera lucida, gently and rather 
regularly undulated in all the cells, in the manner which the 
two lower cells show in the figure. While I was busy com- 
pleting the drawing, the chlorophyllaceous bands changed 
their position first in the two upper and afterwards also in 
the two lower cells, so that they became a great deal more 
powerfully and irregularly curved than before, in the manner 
which the two upper cells of the quoted figure show. These 
movements were accomplished in all the cells during the 
short time of about two minutes. The cells in which these 
movements took place were quite young (formed by an act 
of cell-partition just completed) and were therefore in a 
lively longitudinal increase. Perhaps these movements of 
the chlorophyllaceous bands might be in some degree depen- 
dent on this longitudinal increase of the cell. Here it seems 
as if the chlorophyllaceous bands had grown more rapidly 
than the rest of the cell. — But similar movements of the 
') Sometimes the band of chlorophyll is interrupted in the middle, so that 
the cell is made to contain two chlorophyllaceous bodies; see fig. 4 b. 
