126 ARCHER, ON STEPHANOSPHERA PLUVIALIS. 
movement of the globe itself having ceased. But, upon a 
closer examination of certain of these, there was to be seen a 
gentle hyaline convexity or expansion gradually being ex- 
tended from the green margin of the primordial cell, and 
again slowly drawn i in, W hereupon another similar projection 
took origin close beside the place where the first had vanished. 
This again receded, to be followed, perhaps, by another in the 
same or nearly the same situation as the first, or at all events 
near thereto (Plate VII, fig.3). Presently the extension and 
withdrawal of these hyaline prolongations became more fre- 
quent and vigorous, while they appeared to be chiefly con- 
fined to one hemisphere. Afterwards the mass became 
somewhat elongated, the hyaline projections more lobose and 
more changeable, and finally the primordial cell assumed 
somewhat the outward characters figured for Ameba lmax 
(figs. 4,5, 6). The general contour of the so far changed pri- 
mordial cell, supposing it at rest, might now be described as 
broadly clavate or pyriform, the narrower end tapering very 
considerably, and bluntly poited. From the considerably 
expanded upper end only the lobate pseudopod-like exten- 
sions were projected ; and of these generally not more than 
two or three existed at one time, so that this margin mostly 
thus presented a trifid or bifid outline. The narrow end 
seemed to be nearly if not quite rigid; at least, neither from 
it nor from the sides were any of the pseudopod- hike exten- 
sions put forth, whilst the narrow extremity itself seemed to 
possess somewhat cf a slightly granulated appearance. All 
traces of the conspicuous pair of “ chlorophyll-vesicles” (for 
as perfectly homologous with the bodies so-called in other algze 
I regard them) had vanished—the green contents, keeping 
their colour, had become more decidedly granular ; the 
granules, which were very crow ded and abundant, and of 
varying sizes—the variations, however, taking place within 
very narrow limits—were apparently quite free from each 
other, and with the alternating movements of the lobate 
extensions became rolled onward, I might almost say, just as 
so much shot (of somewhat differing sizes) in a caoutchouc 
bag might be, supposing it endowed with a lke innate 
automatic mobility. I could find no trace of a nucleus, nor 
of a contractile vesicle, as in a true Amoeba; however, if such 
really existed, I fancy the extreme density and abundance of 
the opaque green, granular contents would have prevented 
their being noticed; and I may add, there was not a single 
instance of any foreign organic body to be seen in their sub- 
stance. But, to borrow the terms made use of for a true 
Amaeeba, the “ endosare ” and “ ectosare ” (so to speak) were 
