38 



p. 889) and might be called 

 vinge (Deux. Mém. 1. с), as 

 var. tenuis by intermediate 



Fig. 3. Ectocarpus ovatus Kjellm. 

 a a fragment of a filament with 

 irregularly placed plurilocular 

 sporangia showing to the right 

 a group of sporangia. 168:1. 

 b a fragment of a filament with 

 rhizoids showing the plurilocular 

 sporangia of the rhizoids (com- 

 pare the text). 276 : 1. 



f. Holmii, as mentioned by Rosen- 

 they are connected with the typical 

 forms. 



The specimens gathered in 

 Angmagsalik (in May?) were 43 /^ 

 thick in the lower part of the frond 

 and thus remind of the typical form 

 of E. ovatus. The plurilocular 

 sporangia were frequently opposite, 

 but scattered or terminal sporangia 

 also occurred. Sometimes the 

 plurilocular sporangia were found 

 several together in a small group 

 (compare Fig. 3 a). The rhizoids 

 which were abundant at the base 

 of the plants were frequently fur- 

 nished with plurilocular sporangia 

 in large number as shown in my 

 figure (Fig. 3 b). 



Gathered in (May? and) July 

 with plurilocular sporangia. 



G r. or.: Angmagsalik, Кар Bor- 

 lase Warren. 



Subgen. Streblonema (Derb, et Sol.). 



71. E. æcidioides К. Rosenv. Deux. Mém. p. 80. 



72. E. helophorus K. Rosenv. Deux. Mém. p. 82, Fig. 17. 



In the frond of Petrocelis polygyna I have met with sterile 

 filaments of a brown alga, perfectly agreeing with the description 

 and figures of this species. But my material did not give any 

 further information as to this interesting alga. 



Gathered sterile in July. 



Gr. or.: Stenö. 



