19 
posed by acids, alkalies, iodine, &c. The inner sarcode, heated with iodine, 
discolours, becoming first yellow, afterwards brown black, whilst the 
substance of the outer capsule retains its hyaline appearance, but tinges 
slightly yellow after a time (by imbibition of iodine). When the inner 
mass has, by pressure, been squeezed out of the capsule, and rendered 
colourless, the foreign matter ingested can be seen (chiefly diatomacese and 
the shells of small arcellae and euglyphi) . The large nucleus is soft, large, 
and transparent. It consists of a membrane which encloses a cavity filled 
with solid granules. The development of these granules is probably similar 
to those of the nucleus of the Amoeba terricola before described. The young 
Amphizonella has no capsule. The movement of the animal is particularly 
sluggish — its change of form slow, and contraction unenergetic, consisting 
in slight undulations and indentations of the outer surface. The outer 
capsule appears not contractile, but only yields to the movement of the 
active plasm within. From this inner mass pseudopodia, conical or finger- 
shaped, are thrust forward apparently through the substance of the capsule, 
penetrating it, as it would seem, inasmuch as these processes have no double 
outline, so that the capsule is not pushed out in front of them. The pseu- 
dopodia can be seen making their way with conical points through the 
substance of the capsule, notwithstanding that the substance of the capsule 
powerfully resists the destructive agency of acids, alkalies, &c. The softness 
of its material appears in this — that it is so easily bored through and closes 
up again when the pseudopodia are withdrawn. They do not extend far, but 
sometimes when longer than usual some of the granular sarcode and colored 
pigment streams into their bases. The movements of these arms are more 
active than that of the rest of the body. 
Dr. Greef once observed two individuals coalesce by their outer capsules 
touching, and the substance of the capsules being fused or soldered together, 
but the inner sarcode of each animal remained distinct and separate ; a species 
of union was however effected by a band of yellow hyaline substance, forming 
a sort of bridge or commissure between the two masses of sarcode. Greef 
considers the phenomenon described as conjugation of two animals, as has 
been seen in other Ehizopoda. The history of the nuclear evolution indicates 
a process of sexual generation, or rather a production of brood in the interior 
of the female parent. 
Greef describes three species of Amphizonella— First, A. violacea, already 
described, - 1 - inch. Second, A. digitata — having a distinct double 
outlined capsule and endosarc, with colored granules, a vacuole, and large 
nucleus with distinct nucleolus, movements, more active than those of the 
violacea ; pseudopodia small. Third species : Amphizonella flava. Cap- 
