393 
the interval between it and the test, and giving off the 
pseudopodia through the part of the test at which exists the 
opening for their emission. But no one could look long at 
examples of this creature without readily perceiving a small, 
orbicular, whitish body, itself containing a central well- 
marked, far more minute, darkish granule, immersed, often a 
little to one side, within the bluish granular body-portion. 
In fact, this little body, with its central dark granule, can, I 
imagine, hardly be otherwise regarded than as a true nucleus 
with a nucleolus. It could be found in nearly every speci- 
men, if focussed accurately, with great readiness ; where not 
seen, it can only be supposed that it was turned away from 
observation. But, further, the bluish granular body of the 
rhizopod was itself capable of becoming self-divided trans- 
versely, and in every instance in which this was seen there 
was a new- white body with its black central dot — that is, a 
new “nucleus” w-ith its “nucleolus” (to assume them as 
such) — in each half, and these generally near the recently- 
divided surfaces of the rhizopod-body, so as to lie close to one 
another. In such cases of self-fission the upper half gave 
off its pseudopodia in the usual manner (fig. 11). I never 
could, however, see any further progress or development of 
these so divided examples. 
There is much in the aspect of this rhizopod, both in its 
test, kind of pseudopodia, whitish nucleus and its nucleolus, 
and in the self-division of the contained body-mass, to call to 
mind the form I brought forward in a previous part of this 
paper (ante, p. 259) under a new generic and specific name, and 
called Cystophrys Haeckeliana. If, indeed, we imagine a 
very numerous group of individuals of the form now brought 
forward to be in immediate juxtaposition, and all to poTir 
forth a large quantity of colourless sarcode from the oral 
aperture (if I may so use the word), and the cluster or group 
to become enveloped in the common sarcode mass — the whole 
group of individuals to become, in fact, mutually swallowed 
up therein — and then the marginal region to give off some 
comparatively short but pretty similar pseudopodia — if, indeed, 
we imagine all this, we should have something very like my 
Cystophrys Haeckeliana. But in the latter form the central 
cells show no opening ; they seem to be true closed cells, con- 
tained in the common sarcode body, just like the “yellow 
cells ” of the marine Radiolaria. Nay, the creature seems to 
shed these or extrude them during the exertion of incepting 
foreign matter of an extraordinary character or size, and this 
seemingly with complete nonchalance. See my second draw- 
ing of an example of this creature (PI. XVII, fig. 2). Now, 
