ARCHER—ON RHIZOPODA. 249 
‘“‘tongue-shaped’’ processes of Focke (?), and which I have endeavoured 
to depict ; and at other times these disappear, when the contour becomes 
altogether indefinite and its substance undefinable. These tongue- 
shaped processes seem quite comparable to the long triangular eleva- 
tions in the outer region of Raphidiophrys, which bear up the spicula 
in somewhat longitudinally arranged clusters; but in this form, as 
in the previous, this portion of the structure encloses no spicula. 
This species occasionally presents itself cohering into more or less 
definite groups of a few individuals by union of the pseudopodia; or a 
few of the inner globes, as is the rule in Raphidiophrys, are surrounded 
by the common outer investing stratum. It possesses a considerable 
power of change of place. 
In one of the figures Focke points to the appearance or indication 
of a contractile vacuole,* but he does not seem to be satisfied as to its 
actual occurrence. In several specimens which I have met with, one 
or two, or even three, marginal vacuoles were present, and I watched 
their dilatation and contraction, which process is like those of an Acti- 
nophrys (Pl. IX., fig. 3). This circumstance, which has never shown 
itself in H. myriopoda, is one which, so far as it goes, brings this form 
closest to Actinophrys. 
In the following part of this paper I shall speak of the relationships 
of these forms. 
Pompholyxophrys punicea, gen. et sp. nov. (Pl. IX., figs. 4-5.) 
The next form which claims attention is one of which I might, 
perhaps, cursorily convey an idea by saying it represents an Actino- 
phrys invested by a stratum, more or less deep, of minute hyaline 
colourless vesicles, these latter of very slightly varying dimensions, and 
from amongst which emanate the very slender and delicate pseudopodia 
into the surrounding water. But it appears to me that this would 
hardly give a correct impression of this form ; for in Actinophrys there 
are one or more marginal pulsating vacuoles present, whilst a repeated 
observation of this Rhizopod, not at all uncommon with us in our moor 
ponds, has not shown that it possesses this characteristic. 
We have here, as in the various forms previously adverted to— 
“‘ Radiolarian,”’ except in the possession of the essential ‘‘ central cap- 
“sule’’—an orbicular sarcode body, with a very sharply defined outline 
(which has never displayed marginal pulsating vacuoles), and which 
gives off therefrom a number of linear, very delicate, hyaline and 
colourless pseudopodia (fig. 4). The central body is densely loaded 
with pigment granules, the majority of which are ordinarily of a deep 
reddish or crimson, inclining to a purple colour, which, under all 
magnifying powers by which so minute a form can be detected, imparts 
to it a very distinctive character. There are besides some colourless 
and some greenish granules to be noticed, mingled with the characte- 
® Toc, cut. kV, 1g. 
