286 K. YENDO. 



large cells which project into the cystocarpic chamber above the 

 placenta. Each of these large cells gives rise to one or more 

 gonimoblasts which ramify fasciculately, ending finally in a long 

 clavate carpospore. 



The form of cystocarps of our plant apparently resembles 

 Janczewskia vemicaeformis, from which, however, it may be 

 at once distinguished by the structure of the pericarp and the 

 gonimolobes. As far as 1 can tell, no alga similar to ours has 

 ever been described. 



The present species undoubtedly belongs to the subfamily 

 Dasyece as the stichidia and antheridia characterize it. The 

 cystocarps, especially the gonimolobes, differ, however, from those 

 of the Dasyece members, and approach, to a certain extent, 

 rather to the Polysiphoneæ. 



Fig. 12 shows the earliest stage of the wart-formation on 

 the surface of the host. The tissue of the parasite traverses 

 the intercellular gelatinous matrix of the host and some of the 

 branches protrude above the surface of the host. The oblique 

 partition of the apical cells, or the sympodial ramification, which 

 is regarded by Falkenberg as one of the peculiarities of the 

 Dasyece, is not visible here. 



The only parasitic alga hitherto known among the Dasyece 

 is Colacodasya inconspicua (Reinsch) Schmitz. It has fairly 

 well-developed vegetative parts when compared with ours, and 

 the cystocarps are typical of the subfamily. 



Kristiania, May 16, 1913. 



