396 
is not membranous, but built (if so loosely and irregularly 
constructed a domicile can be said to be built) of foreign par- 
ticles. Again, the pseudopodia, though they often copiously 
branch, do not seem to inosculate, nor to carry a stream 
bearing along granules, but the pseudopodia are clear and 
silvery in appearance. 
For so far, however, Avhilst our animal offers resemblances 
to several other allied forms, as well as distinctions from these, 
upon both of which I shall presently briefly touch, it presents 
still another characteristic (as I previously mentioned) which 
seems to be unique. I allude to the fact that from the whole 
of the surface of the inner sarcode body, except the anterior 
prominence, there are given off exceedingly numerous, very 
short, linear, hyaline, unbranched pseudopodal processes, of 
but slightly varying lengths, which protrude through the 
loosely connected outer covering, and there, when seen mar- 
ginally, looking like a dense fringe, bordering the body all 
round. Here, then, we have a rhizopod presenting the seem- 
ingly remarkable character of one and the same sarcode body 
giving off its processes of two distinct forms or kinds — one 
often long, copiously branched, and very transitory and fit- 
fully changeable — the other short, unbranched, and so com- 
paratively rigid as to give the appearance of a persistent 
hyaline marginal fringe ; the first kind confined to one end, 
which I have called the anterior end of the rhizopod — the 
second kind evenly and densely distributed everywhere else. 
I am not aware, then, that the circumstance just alluded 
to has a parallel amongst Rhizopoda, and hence I cannot but 
think such a form demands a distinct genus for its reception. 
It is true that I myself have drawn attention in a previous part 
of this paper {ante, p. 267) to two congeneric forms, themselves 
forming the type of a new genus, Heterophrys, and otherwise, 
indeed, considerably removed from our form, but which pre- 
sent sarcode processes of two distinct kinds, but each of these 
emanate from a differentiated part of the sarcode body, one 
enclosed within the other, and are not, as here, given off from 
one and the same body, seemingly without any differentia- 
tion, if I might so express it, of its body structure. 
But amongst Rhizopoda provided with a test, and not of 
the radiate (heliozoan or radiolarian) type, our form presents 
what appears to me to he still another speciality. That such 
a form should present an internal contractile vacuole would 
not be unusual, but that it (in some of the specimens, at least) 
should offer a marginal pulsating vacuole, similar to that of 
an Actinophrys, seems to me to he noteworthy. Such, at 
least, so far as 1 am aware, has not been seen in Difflugia or 
