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 [ban that of the filaments, namely 8 — 10 «. 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 mai-gin small cells are cut off which grow out into irregularly beni 

 creeping filaments. In somewhat older plants 

 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 Algae on which it 

 grows. Lehmann figures a basal part of the 

 f. petrophila described by him (1. c. 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 Kylin, free descending fila- 

 ments often occur in the lower part of the 

 plant; they are met with in the asexual 

 individuals as well as in the sexual plants; 

 in the first named, however, they are often 

 wanting. 



The chromatophores are, as shown by 

 Reinke and Kylin , parietal spiral-shaped 

 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 Kylin and though I also think 1 have observed more than one chromatophore 



Fig. (il. 



Cliantransia cfflorexcens. Germinating plant on tube 

 of Hydroid , from YV, June IfllH. A , .spore, provided 

 with meml)rane but still undivided. /J, the basal cell 

 has given olV an erect iilanienl. (.', older plant in the 

 same stage. D, creeping tilaments are given oil from 

 the periphery of the basal cell. li. the basal cell has 

 given off two erect and four creeping filaments ; one 

 of the latter has penetrated into the membrane of 

 the Hydroid. The endozoic part of the filament is 

 shaded. r>(iO : 1. 



