126 
or typical form, A. violacea, following his words as closely 
as may be without altogether a full or precisely literal word- 
for-word translation :— 
AMPHIZONELLA VIOLACEA (Greeff).! 
“The fully-grown individuals of this form have’’(says Greeff) 
** a diameter about 0°15 mm., and are of amore or less globular 
figure, which undergoes little change, even during the move- 
ments of the rhizopod ; this rotund body shows a hyaline 
outer margin, and an inner mass mostly coloured a beautiful 
violet. At first glance” (says the author) “we might suppose 
we had before us the ordinary structural condition of an 
Ameba, that is a particularly dark and coloured granular 
endosarc, with a hyaline ectosare universally surrounding 
the former. But upon closer examination it is seen that this 
external layer represents a completely independent margin 
or border (‘Saum’), with an outline of its own both out- 
wardly and inwardly, and which surrounds the body proper 
of the rhizopod. All round the circumference can be seen 
the limits of this border (‘Saum’) in apposition to the sur- 
face of the inner body-mass....... Still more clearly 
can this be seen when the outer investment is burst by com- 
pression, and some of the sarcode mass ejected. ...... 
** Upon the application of re-agents, the distinction of this 
outer coat (‘Hille’), as an independent part of the structure 
from the inner body, becomes even more decidedly expressed. 
Under acetic acid whilst the body-mass collapses, ejects the 
granules and shows every indication of coagulation, the outer 
hyaline ‘ capsule’ (‘ Kapsel’) remains’ intact, and this even 
though the acid be allowed to act in a more concentrated con- 
dition, or for a longer time. The same thing takes place 
under dilute sulphuric acid, whilst in a more concentrated 
form, the capsule wholly, and the contents partially, become 
dissolved. However, during the dissolution of the capsule no 
other alteration takes place, that is, no sign of coagulation or 
inkes sss. 6. Under the action of alkalies this capsule shows at 
first a tolerably persistent resistance, afterwards, however, be- 
coming dissolved, without, however, having become previously 
altered in appearance. The action of iodine is remarkable: 
so soon as this, in a dilute form, is applied, the violet colour 
becomes destroyed, and its place is taken by an at first clear 
yellow colouring of the whole of the contents, which gra- 
dually, under prolonged action, passes over into a deep 
blackish-brown, all which time the outer border maintains 
perfectly its colourless hyaline appearance, and only when 
1 Loc. cit., T, xviii, figs, 12Q—15. 
