138 
Now, the object of the present additional brief note is 
threefold—first, to correct what turns out to be a misstate- 
ment on my part as to the non-occurrence of Acanthocystis 
spinifera in this country; in the next place, to point out 
certain features in the accompanying drawings (Pl. VI, 
figs. 7, 8), which seem to be of possible interest in connection 
with this elegant form; and lastly, to draw attention to two 
drawings (fig. 9, and Pl. VII, fig. 10), which I take the 
opportunity to insert in the plates, of the little organism, 
already alluded to by me,! possessing so great a resemblance 
to a Diplophrys, pseudopodia retracted and surrounded by 
an aggregation of foreign bodies, although there is, so far 
as I can see as yet, no evidence that, though to a certain 
extent so very like, it actually has anything to say to that 
form, and still less to Acanthocystis spinifera ; nor have I, 
indeed, anything to add to the crude record I have already 
given of it. 
I must now own that I ought to have put forward the 
statement that Acanthocystis spinifera (Greeff) did not occur 
with us, in at least a more qualified manner, for I was then, 
and have long been, acquainted with what I now feel very 
well satisfied is no other, the yellow globules, however, not 
present, and varying comparatively a good deal in dimen- 
sions. But it was not until subsequent to my previous com- 
munication haying been published that I met with fully 
characteristic examples confirming Greeff’s description, so 
far as relates to the form itself, in all particulars. The well- 
marked outline of the’ presumed “central capsule’”—the 
numerous yellow globules immersed in the body-mass, but 
exterior to the “ capsule’—their occasional extrusion through 
openings made by the temporary displacement of the long 
and fine and slender, equal-sized, pointed radial “‘ spines ”— 
in fact, all the described characteristics presented themselves 
to observation. The examples previously met with by me I 
now regard as simply smaller and probably young states 
of one and the same form, the ‘‘ capsule” not yet formed nor 
yellow globules present, or indeed these, perhaps, but few or 
faint in colour; in fact, Greeff himself states these do not 
always occur. Such examples I had, indeed, before me, in 
my ‘‘ mind’s eye,” when I wrote, but kept a mention of them 
in abeyance, imagining they might probably be younger 
states of Acanthocystis turfacea (Carter),and required further 
observation. It is true the spines here are different from 
what is characteristic of that species ; but it struck me they 
might, by fresh accretion, eventually assume their ultimate 
1 Thid., Vol. IX, N. 8., pp. 323-4, and Vol. X, N.S., pp. 102-3. 
