386 
On Some Freshwater Rhizopoda, New or Little-Known. 
By William Archer. 
Pompholyxophrys punicea, gen. et sp. nov. (PI. XVI, 
figs. 4 — 5.) 
( Continued from p. 271.) 
The next form which claims attention is one of which I 
might, perhaps, cursorily convey an idea by saying it repre- 
sents an Actinophrys 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 Actino- 
phrys 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 capsule ” — an orbicular sarcode body, with a sharply 
defined outline (which has never displayed marginal pul- 
sating vacuoles), and which gives off therefrom a number 
of linear, very delicate, hyaline and colourless pseudopodia 
(fig. 4). This 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 characteristic reddish ones, when it 
is examined under a high power ; nothing like a “ nucleus” has 
hitherto been seen. The pseudopodia are often very hard to be 
made out ; they can be sometimes seen to vary somewhat in 
thickness, and sometimes appear to be thicker above than at 
the origin, and they are straight and compai-atively rigid. 
They do not ever seem to coalesce, nor do they seem much 
to exceed in length, at most, the diameter of the body. 
Covering the body in a more or less deep stratum are seen a 
number of colourless, hyaline, spherical, sharply defined (soap- 
bubble-like) vesicular structures. These vary a little in size, 
but are always very minute. They do not seem to possess 
any nuclear or granular contents under even a -i-th objective. 
Between the periphery of the central body and this stratum 
