4 Dansk Botanisk Arkiv, Bd. 2. No. 2. 



half this length; their diameter may reach 50//, but is usually 

 about 25—27//. 



The unilocular sporangia (Fig. 1, Fig. 2 /) are obovate-oval, 

 sessile, attaining a length up to 110// and a breadth of about 70//. 



Fig. 1. Ectocarpus Duchassaingianus Grun. 



Filaments with plurilocular sporangia and a single unilocular. 



(About 90 : 1). 



The present species was found with both kinds of sporangia 

 in the months December — March. 



This species seems to be nearly related to Ectocarpus indicus 

 Sonder (comp, the figure given by M me Weber in "Algues du 



