O74 NATURAL HISTORY SOCIETY OF DUBLIN. 
In Diplophrys the body seems bounded by a definite integument, 
very like the appearance in that respect of the form met with in our 
waters, which I would, as yet, identify as Plagiophrys spherica (Clap. 
et Lachm.); and the places for the passage forth of the tufts of pseudo- 
podia are indicated, in examples met with in which they are not pro- 
jected, by a little rounded depression. The internal amber-coloured 
body sometimes appears as if fractured into a number of portions; but 
these still clustered in pretty nearly the same spot. The region beyond 
the amber-coloured globule is pellucid, and of somewhat bluish tint, 
with a few colourless granules. 
Diplophrys (Barker) might then, to a certain extent, be said to bear 
a parallel relationship to Plagiophrys (Clap. et Lachm.), (Pi. spherica), 
somewhat similar to that of Amphitrema (mihi) to Pleurophrys (Clap. 
et Lachm.). 
But Greef is disposed to suggest that the yellow bodies of his 
Acanthocystis spinifera, escaping forth therefrom, each surrounded by a 
hyaline halo, or rather hyaline vesicle, have the power to put forth, and 
indeed actually do put forth, at opposite poles, those radiating tufts of de- 
licate pseudopodia depicted in his figs. 26, 27, 28 (doc. cot.) —in a word, 
assume the characteristics of Diplophrys Archerc (Barker). Greef seems 
further inclined to regard the form figured in his fig. 25 as but a modi- 
fication of the same, and his fig. 29 as but great consociated groups of 
the former. But, as before mentioned, I cannot but regard his fig. 29 
as representing one and the same thing as my Cystophrys oculea. 
Now, one or two considerations appear to me to be opposed to Greef’s 
view. The yellow oil-like granules, with the surrounding definitely 
bounded body, as if by an outer wall, of figs. 26-28, are in dimensions 
considerably larger than the yellow granules with their surrounding 
cell-like structures of fig. 29—or, as I would in other words be disposed 
to express it, the individuals of Diplophrys are notably larger in size 
than the contained cell-like structures of Cystophrys oculea—therefore, 
supposing the latter to be only a group of the former bound by some 
common matrix into a colony, the individuals of Diplophrys must in 
some way have suffered a great dwindling down in size in the process. 
In fact, the average diameter of the body in Diplophrys may be taken at 
sooo Of an inch, whilst the average diameter of the contained cell-like 
structures in Cystophrys oculea may be taken at z>55 of an inch. 
Again, the view that Diplophrys springs from a development of the 
yellow bodies of Acanthocystis spinifera seems to be controverted by the 
fact, quantum valeat, that the latter species has not been ever found in 
this country. Further, as I have mentioned in a previous part of this 
paper, the cell-like structures in C. oculea are invested by a common 
matrix of sarcode, from the rather definitely bounded surface of which 
emanate the pseudopodia; and this enclosing sarcode body has the power 
to tear itself in two, new pseudopodia emanating from the just dis- 
joined surfaces—that is to say, these bodies are in the sarcode contained, 
not themselves the living sarcode-containing structures. Of course, Iam 
going on the assumption that Greef’s fig. 29 actually does represent my 
