104 M * Foslie. 



most nearly related to f. abbreviata. They are more tenuous 

 than specimens of that form from Novaya Zemlya, and, as 

 they are sterile, the determination is not quite sure. Howe- 

 ver, with reference to the ramification they coincide well 

 with the present species. 



Distribution: Found at Kjollefjord, rare. 



Dictyosiphon fragilis Harv. 



in Kiitz. Spec. Alg. p. 485. 

 Descr. Dictyosiphon fragilis Kiitz. 1. c. 

 Fig. „ „ „ Tab. Phyc. 6, t. 52. 



Syn. Dictyosiphon hippuroides f. fragilis Kjellm. N. Ish. Algfl. p. 332. 



It seems to me that among the numerous forms of D. 

 hippuroides also occurring along the northern coast of Nor- 

 way, D. fragilis is one of the more distinctly marked ones, 

 and, by a severance of D. hippuroides, ought to be regarded 

 as a distinct species of the same degree as D. corymbosus. 

 I at least found it pretty well differentiated, but, according 

 to K j e 1 1 m a n, it shall not always be independant, approa- 

 ching so nearly to D. hippuroides that it is difficult to draw 

 a limit between them. However, the same is the case with 

 D. corymbosus too, as far as I am able to judge, and even 

 betwee'n D. hippuroides and D. foeniculaceus is the limit of- 

 ten difficult to draw. 



The species is characterized by its loose consistency, 

 mostly distinct main axis and coarse, often more or less flex- 

 uous branches increasing in thickness upwards. The colour 

 is darker than by D. hippuroides, sometimes inclining to rusty 

 brown. Dried specimens are more difficult to distinguish 

 from the latter because it dwindles much in drying, owing 

 to its loose consistency, and looks equal in thickness, but, 

 on the other hand, it becomes still darker and sometimes 

 assumes an almost black colour. The zoosporangia are ge- 

 nerally larger than by the last named species, and more 

 numerous. 



