123 
creeping Amoeba condition, an Amoeba of the simplest kind 
(Protamceba), without a nucleus and without a contractile 
vesicle, without ramification and reticulation of the pseudo- 
pods (fig. 6). III. The reticulated Rhizopod condition, a 
colossal naked plasmodium, with ramification and reticulation 
of the pseudopods, and with formation of vacuoli (figs. 10-12). 
In the immovable condition the Protoinyxa appeared, on 
the other hand, as an encased Lepomonies, as a Lepocytode. 
enclosed by a separate membrane, consisting of a thoroughly 
homogeneous globular plasma-body, and a structureless mem- 
branous covering separated from it (fig. 1). The plasma- 
body divides by monosporogony into numerous small balls 
(figs. 2, 3), which, after their exit from the burst membrane 
of the cyst (fig. 4), swarm about as Flagellata (fig. 5). With 
this the simple cycle of the generation of the Protomyxa is 
completed. 1 
II. — 2. Myxastrum radians. 
See Plate X, figs. 13 — 24. 
On the quay of Puerto del Arrecife, the port of the Canary 
island Lanzarote, on the fiat places of the harbour’s beach 
which are left uncovered by the water at low tide, several 
Actiniae are to be found in great quantities, especially a 
brownish-green Anemone, besides thick tufts of Codium 
tomentosum and other Algae. The fine brown mud which 
covers the stony bottom of these fiat places contains, among 
other forms, numerous Diatomaceae and Polythalamia. In 
order to study the latter, and, if possible, to ascertain some- 
thing about their reproduction, I collected a little of this mud 
and let it stand for some time in a shallow covered glass 
basin. After some days, as I stirred up the mud in one of 
these glasses, which I held against the light, with a glass rod, 
I perceived among the dark particles which had been stirred 
up and were floating about in the water (Diatomacem, bits 
of stone, &c.) single small, transparent, pale grey dots, just 
visible to the naked eye, which much reminded me of Acti- 
nosphcsrium Eichhornii, Stein Adinophrys Eichhornii, 
Ehrenberg), of our fresh waters, (which is visible under 
similar circumstances. Placed under the microscope, it 
’ My Protomyxa are probably very closely allied to the white eg°--like 
balls which Ecker found in dead eggs of Lymnaus stagnalis, (‘ Zeitscur. fur 
Wiss. Zool.,’ 1851, vol. iii, p. 412, tab xiii, figs. 1 — 4). The.globular cysts, 
from which issued sporules with two tails (Cercomonadae) remind us front 
Ecker’s description extremely of Protomyxa. Unfortunately their further 
development was not observed. 
