135 
June. The germinating plants were found among fully developed plants bearing 
monosporangia and originated undoubtedly from monospores. As shown in fig. 61 
the germinating spore becomes a hemispherical basal cell the diameter of which 
is much greater than that of the filaments, namely 8—10 p- This cell keeps its 
form, at all events for some time, and divides only by peripheral walls, by rami- 
fication. An erect filament is early given off from the upper face of the cell, and 
from the margin small cells are cut off which grow out into irregularly bent 
creeping filaments. In somewhat older plants x 1 
two erect filaments rising from the basal cell | 
and an increasing number of radiating creep- \ / | 
ing filaments are visible (fig. 61 E). In some | 
cases it was observed that a filament, after 
having run some distance on the surface of 
the wall of the hydroid, had suddenly pene- 
trated the wall and continued its way within 
it (fig. 61 E), I do not know if this species 
can also penetrate the Algze on which it 
grows. LEHMANN figures a basal part of the 
f. petrophila described by him (1. e. fig. 10), 
which is rather different from the young 
stages observed by me, as it is a parenchy- 
matous disc giving off three erect filaments 
from three different cells, and no cell is 
distinguishable as being the originally single 
basal cell. The difference may be possibly 
due to the difference in age, in part also 
to the different substratum. 
As shown by Kytin, free descending fila- 
ments often occur in the lower bau! of the Chantransia RE ape plant on tube 
plant; they are met with in the asexual of Hydroid, from YV, June 194. A, spore, provided 
individuals as well as in the sexual plants; il, membran bu il ante ha el 
in the first named, however, they are often same stage. D, ereeping filaments are given ofl from 
ti the periphery of the basal cell. E, the basal cell has 
ya: given off two erect and four ereeping filaments; one 
The chromatophores are, as shown by of the latter has penetrated into the membrane of 
o a the Hydroid. The endozoie part of the filament is 
REINKE and Kyrın, parietal spiral-shaped i shaded. 560:1. 
bands. Usually there appears to be two, 
sometimes only one, and in other cases they are more irregular, either more nu- 
merous or more branched, a matter difficult to decide. LEHMANN states expressly 
that the cells contain one much-branched chromatophore only, the apparently dis- 
tinct chromatophores being always connected by anastomoses. Though this state- 
ment is in contradiction to the figures of Kuckuck (REINKE, Atlas Taf. 21 fig. 3) 
and Kyrın and though I also think I have observed more than one chromatophore 
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