564 TKAXSACTIONS AND PROCEEDINGS OF THE 



I discovered from it that G. f areata, the species which 

 is commonest and most widely distributed in Japanese seas, 

 develops not only paraspore fruits, but also true cysto- 

 carps. Still I found that fruits of the latter kind, which 

 always appeared on other plants than those which bore, 

 the paraspore fruits, were much less common than the 

 former. In specimens with cystocarps the presence of the 

 fruit was only recognisable from the exterior by small 

 elevations ^ obviously distinct from the pronounced projec- 

 tion caused by the paraspore fruits. The procarps here, 

 as in Cr. capillaris, were throughout embedded in the inner 

 part of the wall, and enclosed in its mucilage ; moreover 

 they were identical in form with those of the other species 

 of Gloiopdtis, and they also originated secondarily in the 

 same way from the lower and middle cells of the wall- 

 forming filaments. 



In the second Japanese species, G. capilkwis, which 

 appears to be much more rare in Japanese waters than 

 G. furcata, I have only observed cystocarps, never para- 

 spore fruits. The specimens which I examined bearing 

 sporangia were always devoid of structures of the latter 

 kind. At the same time I have only seen a few true 

 specimens " of this species, and it is therefore not 

 impossible that the formation of paraspore fruits may 

 also occur here. 



In the same way I have never seen paraspore fruits in 

 G. cervicornis, the peculiar small and characteristically 



^ I may mention that fig. 1, xx., in Suringar's illustr. (comja. pi. I.e. 

 p. 21) represents the transverse section of such a cystocarp-beariug speci- 

 men of G. f areata. Regarding the figure in J. Agardh's Morphologia 

 Floridearum, t. xviii. fig. 10, I am, however, doubtful whether it repre- 

 sents a specimen bearing cystocarps or jsaraspore fruits. This drawing 

 which, according to the explanation of the figure, illustrates the shape 

 of the cystocarp of G. intricuta is too insufficient to allow the nature of 

 the fruit represented to be determined. However, since J. Agardli 

 (Epicrisis, p. 274) ascribes to the genus Gloiopdtis cystocarps, the fruit- 

 nucleus of which may be penetrated by strands of sterile filaments 

 (Columnis filorum sterilum a placenta excurrentibus), it may be 

 assumed that he had throughout only examined paraspore fruits in 

 Gloiopeltis, and that, therefore, the drawing had been designed from a 

 paraspore-bearing specimen. 



- In many cases the specimens of (t. capillaris, which I examined, 

 were not correctly determined, and belonged rather to G. furcata. 

 But among the incorrectly named material of G. capillaris I saw 

 several specimens with sporangia and paraspore fruits. 



