86 Proceedings of the Royal Irish Academy. 
as lie describes, the same characters of structure and movements — '^that 
is, an uniYersally closed hyaline outer coat or capsule, with extremely 
pale digitate processes projecting through the latter. In A. digitata 
the separation of the hyaline protoplasm of the rhizopod from the 
outer capsule is still more distinctly evident, since the first surrounds 
the granular interior substance as a more or less broad stratum. The 
motions are more vigorous, and are indicated by the fact that mostly 
at first broad hillock-like processes, still encompassed by the outer 
border, become pushed forth, from whose ends then the digitate 
pseudopodia project. The granular inner parenchyme (endosarc) shows 
for the most part a coarsely granular substance, which, however, ap- 
pears enclosed in an extremely finely granular one. In the interior 
there is to be seen constantly a large round nucleus, with a likewise 
comparatively large and sharply-bounded nucleolus, and besides mostly 
a large and a couple of smaller contractile vesicles. Likewise, the 
above-mentioned lime crystaloids are never absent. The animal 
reaches a diameter of about 0*1 
This, then, is all Greeff has to say on this form, and he gives no 
more close description. All his forms, however, are illustrated by 
figures. 
Yet, a third form, named Amphizonella flava, is (provisionally) 
referred by Greeff to the genus typified by the two preceding forms, 
and I would complete the data to enable the conception to be gained 
thereof by giving his words thereon: — 
Amp]ii%oneUa flava (Greeff). 
Although" (says the author) I at first hesitated to refer the 
form to the same genus as the preceding, still I may do so, be it, perhaps, 
but provisionally. This is likewise surrounded by a coat, but a much 
fij^mer one, as it would appear a peculiar cuticular shell" (' hautige 
Schale'). This 'shell' ('Schale') is of a light yellow colour, and, un- 
like that of the two previously-described species, is not directly ap- 
plied to the body proper of the rhizopod, but lies round about it as a 
wide sac, and thus follows the contractions and modifications of the 
inner body, so far as these touch its walls, but always with a certain 
tenacity, whereby continually alternating folds and lines travel 
over the surface. ^Nevertheless, the ' skin' ('Haut') possesses an ex- 
traordinary extensibility, so that sometimes it becomes stretched, by 
the pressing forwards of the processes of the iimer body, to an 
extremely thin and delicate layer, which may be carried on to such 
a degree that the skin at this place appears quite white, whilst in its 
ordinary condition, as above mentioned, it is of a yellow tint. Some- 
times (says the author) I saw pale, long, hyaline processes from the 
interior press against the outer ' capsule, ' but I was unable to establish 
with certainty whether the latter became broken through in the pre- 
viously described manner thereby. It appears, however, undoubted 
