248 NATURAL HISTORY SOCIETY OF DUBLIN. 
structure seems capable only of sending out longish triangular pro- 
longations, rendering themselves evident by piling up the spicula into 
long peaks around certain pseudopodia. These latter, in the present 
form, are much coarser, microscopically ps, than they are in 
Raphidiophrys. 
The second form (Pl. IX., fig. 3) here to be drawn attention to is 
one, examples of which I exhibited in September, 1867, at a meeting 
of our Club, but I did not then venture to describe it or give it a name. 
My attention was recalled to it on the appearance of a paper lately 
published by Dr. Focke, of Bremen,* in which a Rhizopod (his ‘“ No. 
1’’), which I cannot but consider as identical with the present, is ex- 
patiated on and figured, but neither specially described nor named. As 
I feel, however, pretty satisfied that it should no longer remain so, 
and as the fine form just mentioned (named by me Heterophrys myrio- 
poda) seems so truly congeneric with it, I have thought myself quite 
justified in uniting them under one genus; and whether I am absolutely 
correct in believing the form now under review as identical with 
Focke’s, I trust he may (should these lines ever meet his eye) pardon 
the liberty in my associating his name with it, and calling my form 
Heterophrys Focku. As before, I shall defer a detail of the generic 
and specitic characters to the end of this paper. 
Compared with Heterophrys myriopoda, this (H. Fock) is minute, 
though it occurs of varying sizes. The inner sharply bounded sareode 
body, in which I am unable to detect a ‘nucleus,’ sends forth through 
the outer stratum long and slender filiform pseudopodia, and, though 
it contains a subperipheral stratum of greenish granules, they do not 
appear to be of the nature of chlorophyll, and the body is sometimes 
colourless, or of a bluish hue not uncommon in rhizopodous forms. 
The outer stratum is of a somewhat buff-coloured hue, and often of an 
indefinite outline, and of that somewhat granular, irregularly contorted 
appearance, as if bearing in its substance bands and little spots of vary- 
ing nature and deusity, which gives it that aspect which, in the Club 
Minutes, I somewhat indefinitely denominated ‘‘ streaky.” Believing, 
as I do, that Focke and I have had the same form under examination, 
I could not avail myself of what would appear to me a better descrip- 
tion, so far as it goes, of the appearance of this outer region :—‘ Es 
erscheinen in der Sarcode selbst lichtere und trtibere Stellen, zarte 
geschlangelte Fadchen, sehr kleine Kornchen, hin und wieder ein 
grosseres Blaischen, zeigen eine Begrenzung durch schwache Shatten- 
linien, welche stets in dem Augenblicke, wo man sie scharfer ins Auge 
fassen will, wieder verschwinden.” This outer region often possesses 
no very definite outline or contour; it frequently presents, however, a 
number of marginal triangular, irregular, changeable projections, the 
* Siebold and Kolliker’s ‘‘ Zeitschrift fiir wissenschaftliche Zoologie, Band xviii. 
Heft 3, 1868. ‘‘ Ueber Schalenlose Radiolarien des stissen Wassers,’’ by Dr. Gustav 
W oldemar Focke. 
