115 
colourless, very slender, hair-like processes, of very variable 
degree of development. Sometimes these attain a length at 
least equal to one-third (Fig. 1), perhaps even sometimes 
approaching one-half the diameter of the body of the 
Rhizopod, whilst, in other specimens, these hair-like processes 
appear much shorter, giving a merely pilose appearance to 
the surface (Fig. 2), or, so short are they, as even to impart 
a merely roughened or granular aspect to the surface or 
periphery of the coat (Figs. 4, 5) ; and again, they appear in 
certain other examples as all but obsolete (Fig. 3). An 
empty coat presents a dotted appearance all over (Fig. 4). 
These hair-like processes, especially when well developed, 
appear, on first examination, not unlike pseudopodia, and we 
might be inclined to suppose we had before us a Heliozoan 
or Radiolarian form (possibly referable to Greeff’s genus, 
Astrodisculus),! rather than one of Amceban affinity ; but 
that, as is seen, would be a wholly incorrect interpretation of 
the characteristics of our form. 
I have said this outer coat appears to form not only a 
complete investment at all points to the body-mass, but, at 
first sight, to be even in complete union therewith. But this 
latter is not the case, for more exact examination of a number 
of examples shows not only that it can become locally, though 
but slightly, removed from contact with the body-mass, but 
also that, in the majority of cases, a region of the body exists, 
from which this outer coat appears to be absent. ‘That this 
outer coat is in reality not only a completely differentiated 
portion of the creature’s structure, but even, so to say, an 
independent part of its organization, is shown not only by 
meeting occasionally the empty, as it were discarded, coats 
in the water (Fig. 4), but by the action of re-agents on 
ordinary examples, as I shall presently allude to. 
I have mentioned that very often a portion or region of the 
surface of the living sarcode body of this Rhizopod appears 
to be destitute of this coat, around which the latter often 
appears to thin off, retaining, however, its ordinary super- 
ficial characteristics. And it is from just this region that the 
greater part of the conical or slender tapering pseudopodia 
above described emanate. Sometimes the outer coat appears 
to push up here all round, and a somewhat broad projection 
of the sarcode body comes forth, this giving off a considerable 
number of the pseudopodia, projecting outwards like a crown, 
or, may I say, like an “aurora?” (See Figs. land 2.) For, 
1 Greeff, “Ueber die Radiolarien und Radiolarien-artige Rhizopoden des 
Siissen Wassers,” in Schultze’s ‘Archiv fiir Mikroskopische Auatomie,’ 
Bad. v, p. 496. 
