ARCHER—ON RHIZOPODA. Vig es. 
C. oculea, which I can hardly doubt; nor can the yellow colour of the 
central bodies in this figure, as opposed to the red colour in mine, much 
militate against this view, for the tint expressed to the eye seems to me 
to depend a good deal on the focussing and on the illumination. But 
it may be premature to judge of Greef’s opinions on the forms as figured 
by him, as he promises to return to them in the next forthcoming sec- 
tion of his memoir. For my own humble share, in the mean time, I 
cannot but think it impossible that Diplophrys can be a phase of the 
yellow bodies of Acanthocystis spinifera at all, whilst I should have as 
little doubt that it can be either any preceding or subsequent state of 
fig. 29, here supposed by me to be one and the same thing as C. oculea. 
Tam myselfa good deal puzzled by the occurrence of the curious little or- 
ganism drawn attention to by me at one of our Club meetings,* which pre- 
sents such a perplexing resemblance to a Diplophrys, pseudopodia drawu 
in, and the body surrounded by an aggregation of small diatom frustules, 
fragments, and miscellaneous splinters. I need not, however, further 
advert to this little organism here, as in the place alluded to I have re- 
corded the little I have ever been able to make out aboutit. Had I 
not overlooked it, I would have given a figure of this queer little thing 
on my previous Plates; perhaps I may take a future opportunity of 
doing so. 
I hope I may not be thought to have made a too wide and unneces- 
sary digression from the affinities and differences of my Acanthocystis 
Pertyana; but in contrasting it with Greef’s A. spinifera, the remainder 
became unavoidable. I need not hardly say I await with interest Greef’s 
further communication hereupon. 
Genus, Raphidiophrys (Arch. ). 
Generic Characters.—Rhzopod composed of two distinct sarcode re- 
gions—the mner| forming one or several rounded individualized definitely 
bounded hyaline sarcode masses, each containing a subperipheral stratum of 
colouring granules—the outer more or less coloured, soft, and mobile, bear- 
ang numerous elongate regularly scattered siliceous spicula, acute at both 
ends, and forming a common investment to the inner globular masses, which 
latter gwe off long slender non-coalescing pseudopodia. 
The main distinction of this genus from Acanthocystis is the spicula 
being solid, no difference in the extremities, and scattered every way. 
The absence of a central capsule excludes it from marine Radiolaria, 
to which it otherwise possesses affinity. 
* “ Proceedings of the Dublin Microscopical Club,” March, 1869, in “ Quart. Journ, 
of Micr. Science,” vol. ix., N. S., pp. 823-4. 
VOL. V. 20 
