134 
far too brief and meagre to be able to arrive at an opinion. 
Could his figure possibly represent such a form as mine, no 
pseudopodia present, and with very long and comparatively 
coarse, hair-like external processes? or could his form pos- 
sibly rather represent an Acanthocystis? So uncertain does 
it, however, appear to me, as regards its true character, that 
I would here simply content myself with referring to his 
communication, and leave the determination of his rhizopod 
and its possible relationship here, though such as that I now 
bring forward, to the future. 
Possibly, should any of the (now four, perhaps I might 
write five, or even six) forms referable here be encountered 
by observers in this country, an attempt likewise to embody 
their seeming individual specialities, as well as those of the 
present new form, in short characters, may not be quite 
without use (leaving, however, Ameba bilimbosa (Auerb.) 
and Corycia (Duj.) in abeyance). I may begin with Greeff’s 
type-form : 
Amphizonella violacea (Greeff). 
Large, mostly rotund in figure ; nucleus large, enclosed in a 
hyaline wall, filled with round solid granules ; the granular 
body-mass permeated for the most part by a dark violet pig- 
ment, imparting that prevailing colour, which, however, towards 
the exterior, is varied somewhat by another diffuse yellowish, 
or somewhat brownish pigment; the pseudopodia colourless, 
conical, blunt; the investing coat colourless, of varying depth 
or thickness, outwardly smooth. 
Amphizonella digitata (Greeff).? 
Medium sized, variable, and mostly lobed in figure ; nucleus 
large, containing a comparatively large and sharply-bounded 
nucleolus ; body-mass colourless, coarsely granular at the 
central region, inclosing, however, a further finely granular 
substance containing lime crystalloids, outer marginal region 
hyaline ; pseudopodia colourless, very short, conical and blunt ; 
the investing coat of less depth than in A. violacea, uniform in 
thickness, smooth. 
Amphizonella flava (Greeff) 2 
Minute, variable in figure; nucleus not detected; body- 
mass colourless (?), granular ; pseudopodia pale hyaline ; outer 
1 Loe. cit., p. 323, T. xviii, figs. 12, 13, 14, 15. 
2 Ibid., p. 328, T. xviii, fig. 18. 
3 Ibid., p. 329, T. xviii, fig. 19 a, d. 
