246 NATURAL HISTORY SOCIETY OF DUBLIN. 
productive act. Examples of what I assume to be doubtless the Pro- 
tameba prinitiva are met with in many puddles, and I would have 
imagined them to have been but undeveloped conditions of Amoeba 
itself. In Cystophrys oculea, as well as C. Haeckeliana, it is possible 
that the central cells may subserve to reproduction. 
Heterophrys myriopoda, gen. et sp. nov. (PI. VIII., fig. 4), and Hete- 
rophrys Fockuw (Pl. VIILI., fig. 3). 
Had it not been for the ‘‘ yellow cell’’-like structures appertaining te 
the two preceding Rhizopods, allocated by me to the new genus Cysto- 
phrys—thus, perhaps, bringing them in that regard somewhat close to 
the marine Radiolaria—I should have preferred taking up the two 
forms here placed under a new genus, Heterophrys, immediately after 
Raphidiophrys. For although these latter have neither spicula nor 
any organization that might be assumed as comparable to ‘‘ yellow 
cells,” they yet seem to me, apart from the spicula, to come pretty 
close in other respects to Raphidiophrys. Still, the important character 
of the presence of the spicula in that genus, and their absence here, 
would forbid their being ever united in one genus. The two forms 
now under consideration, each, however, in a diverse manner, present 
characters in their structure which reduce them both to a single type, 
at the same time offering an amount of speciality separating them from 
any other heliozoan genus. The absence of a ‘‘central capsule,” of 
course, excludes them from Haeckel’s marine Radiolaria. 
As it seems to me, however, that the subsequent of these forms 
met with by me approximates the more closely to Raphidiophrys, 
whilst that first found (or Focke’s form) comes nearer Actinophrys, I 
shall advert to the former in the first place, although the second in 
point of time of being encountered. 
As previously, it will be more convenient in the present running 
commentary to take up the examination of the structure of each from 
within outwards, as Focke, indeed, has done in regard to that which I 
conceive to be identical with my form, of which more below. 
We find, then, in the form which I name Aeterophrys myrtopoda 
(Pl. VILI., fig. 4), a ball of sarcode of about the same average 
dimensions as in Raphidiophrys, hyaline, sharply bounded, and charged 
with a similar dense stratum of somewhat large-sized chlorophyll- 
granules, arranged in a hollow-globular manner beneath the periphery 
of the orbicular sarcode body, with a few colourless minute granules 
besides, sometimes showing a dancing movement. From this body are 
given off, not very numerous, comparatively stout, slightly tapering, 
filiform pseudopodia, some of which are sometimes somewhat dilated at 
the base or origin. Surrounding this globular central body, an outer 
stratum presents itself, of a somewhat buff-coloured hue, and cloudy 
granular appearance. One can to some extent recognise three different 
regions in this investing stratum, not at all separated, however, by any 
decided line of demarcation: at the lowest part, or that nearest to the 
central body portion, it is more cloudy and somewhat more granular in 
