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slight greenish-yellow hue, whilst, however, the contents 
have that greyish-blue tint very like that of the so-called 
‘nucleus’ in Amoeba, &c. But, even admitting that the 
central cells of our rhizopod be so far comparable with the 
yellow cells of the marine Radiolaria, it could not possibly be 
admitted into that great group at all, owing to the total want 
of a ‘ central capsule’ — this latter being a part of the or- 
ganization of the Radiolaria of Haeckel which is common to 
every member of the whole of that marvellously beautiful 
class. 
If, indeed, our animal had a central capsule, it would seem 
easy to show a relation to such marine forms without skeleton 
of anv kind, as Thalassicolla and Thalassolampe, or Collo- 
zoum ; but being destitute of that organ it must remain by 
the side of Actinophrys, Raphidiophrys, Clathrulina, Acan- 
thocystis, and other less allied fresh-water Rhizopoda, until, 
perhaps, a greater number of types become known, or until 
more is made out of the development of these humble ex- 
istences, and a light shed upon their real affinities. It will 
be seen, however, that upon a comparison and contrast with 
its seemingly nearest allies, it offers characters showing affi- 
nities in various directions, but at the same time forbidding its 
finding s place, so far as I am aware, in any known genus. 
As regards the ‘ yellow cells,’ Haeckel suggests that they 
may have something to say to the function of digestion. I 
am at least strongly inclined to suppose that in the present 
form the central cells must subserve rather to reproduction. 
But on this point I am without any but too cursory observa- 
tions to be worthy of record. Let us, however, hope that 
this animal may turn up on some other occasion — perhaps at 
the same season next year — although, as will appear, it is 
readily overlooked ; but I should not be without hope of 
refinding it, as I met with it in several gatherings in Callery, 
and in one from near Carrig Mountain, though, on the other 
hand, a more recent gathering from one of these localities 
did not reveal it. 
I now refer to the second form, Cystophnjs oculea (n. s.), 
which, provisionally at least, I would associate with the 
foregoing; I have tried to reproduce it in fig. 3. It 
will he seen that, whilst it agrees in having a number of 
central cells, it differs in the character of the pseudopodia, 
which here are fine, linear, directed in various ways, and do 
not branch or inosculate ; and this is the principal reason why 
I imagine that it is possible they should not fall under one 
and the same genus, for I think the nature of the pseudopodia 
is, generally speaking, very characteristic in these forms. 
