310 The Bevelopment of Organisms {"".C^^lx^S^^l^tT 
growth, apparently from some of the pollen-cells. These filaments 
closely resembled the fungus of the cork infusion, and the subsequent 
evolution was also the same in the formation of cells, the exuding 
from them of bodies resembling pieces of jelly, and finally the 
development of infusoria. The only difierence is in the character 
of the infusoria, which in this case have the form of Paramecium 
caudatum, rather than of Kolpoda cucullus, phases of which 
present themselves in the cork infusion. There is afterwards a 
development of other forms, especially a light-coloured spherical 
body, which spins rapidly through the fluid, and which is similar 
to organisms I have found in infusions of coal matter. The pollen 
of EschoUzia differed in its products from that of Scabious in the 
absence of the fungoid growth. Instead of the fluffy appearance, 
the bottom of the bottle was covered with a carpet of yellow sub- 
stance, which adhered firmly to the glass. On examining a portion 
of this substance with the microscope, it was found to consist of the 
pollen-cells, which were apparently united by the interlacing of 
very fine fibres developed from them. There was, however, the 
presence, almost from the very first, of the same kind of infusoria 
as those which were finally developed in the other pollen infusion. 
One kind, unlike the others, was characteristic of both infusions, 
and I was much struck by its peculiar character, not having met 
with it elsewhere. It was very simple in appearance, resembling 
a short thick worm, without, however, any wriggling in its move- 
ments. Other pollen — that of the fuchsia — which I have tried, 
yielded results similar to those of the Scabious, in the develop- 
ment in the first place of a fungoid growth, the ultimate pheno- 
mena being the same as in both of the preceding cases. In this 
infusion, however, there was an extraordinary development of the 
spherical bodies which were produced, though in a less quantity, 
from the other pollen. These results are perfectly confirmed by 
the phenomena observed when the contents of the anther, which 
has been kept in water some time, are examined under the micro- 
scope. If the anther be crushed on a glass slide, it wDl be found 
to contain, in addition to the tissue itself, a quantity of filamentous 
growth, and numerous infusoria of several different kinds. In one 
instance I was surprised to find what appeared to be a perfect 
example of Desmidiacese, which was paralleled by the presence of 
a common species of Diatomacese, among the filaments of the infused 
Scabious pollen. I do not know how to account for the presence 
of these organisms in this curious situation. It may be that under 
the conditions named, they are sometimes developed; and on one 
occasion I undoubtedly found a broad fibre, having the exact appear- 
ance of an ordinary form of Desmidiacese, growing from a pollen-cell. 
I have thus given a general idea of the phenomena attending 
my experiments, and, in conclusion, I will shortly notice their bear- 
