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33a). Here was a new Amoeba, but as yet there was neither 
contractile vesicle nor vacuoles. It began to move actively, and 
got amongst some algae, and was lost to view. It was a most 
startling proceeding, and would appear to be of rare occurrence. 
Absolute splitting in half, or what may be properly called fissi- 
parity, I have not seen in Amoebae. 
As some of these Amoebae gradually became quiescent it was 
possible to examine the nucleus, and by transferring them to a 
glass slide and employing a y^-th immersion object-glass, the 
structure of this remarkable piece of differentiated protoplasm 
could be pretty well made out. The nucleus (figs. 1 6, 6, 36, 
44) is usually darkish, not very transparent, and its invest- 
ing structureless dense film is partly surrounded by a clear 
space ; but, as age comes on, this space is often lost, and the 
little body is enclosed in a mass of granular protoplasm be- 
longing to the endosarc. Then a small globule or nucleolus 
becomes readily visible within the nucleus (fig. 39). But it 
nevertheless sometimes happens that the clear space increases in 
size and completely surrounds the nucleus. In both instances it 
may be observed that the nucleus subdivides within its invest- 
ing film, so that it appears to be a mass of closely-packed nuclei 
or small globes. Now these tiny globes greatly resemble some 
of the granule spheres of the endosarc, and as these are the rudi- 
ments of young Amoebae it is quite possible that those of the nu- 
cleus will turn to independent individuals when the whole bursts. 
It is incredible what a number of these tiny dots of granules 
escape from a good-sized Amoeba when it bursts ; hundreds of 
thousands move off from the mass and indulge in the fidgets of 
the Brownian movement until they increase in size and throw 
out a process and become masters of their movements to a cer- 
tain extent (fig. 13). 
One more Amoeba must be noticed (figs. 38, 40) ; it is common 
up to a certain time of the year, becoming encysted before the 
hot weather sets in ; or else it hides up amongst the mass of 
mud and tangled confervae on the floor of the pond. It is only 
to be found in the waters which are tinted more or less with an 
iron rust colour; and as a rule it is so greedy and so constantly 
devouring its minute prey that it does not readily come out into 
the clear water of the cell. This Amoeba may, therefore, readily 
escape notice. The first seen by me was half bidden under grains 
of dirt and a jumble of Desmidia and Pinnulariae, and as the 
part visible resembled the ordinary Amoeba just described, no 
attention was paid to it. But after a while a great flow of clear 
diaphane occurred from the mass, which was followed by a rush 
of granules into the rounded projection, the whole being in a 
very tumultuous state. Then a great cylindrical Amoeba streamed 
forth, one end first as usual, and at the opposite end of the body 
