^-s 



i04 



M. Foslie. 



most nearly related to f. alhreviata. -They are more tenuous 

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

 tliey are sterile, the determmation is not q_uite sure. Howe- 

 ver, with reference to the ramification they coincide well 



with the present species. 



DistrilmUon: Tound at Kjollefjord, rare. 



Dictyosiphon fragil is Harv. 



in Kiitz, Spee. Alg. p. 485. 

 Deser. Dictyosiphon fragilis Kiiiz. 1. c. 



Fig. 



W 



» 



75 



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 severanoe of D. hippuroides, onght to be regarded 

 as a distinct species of the same degree as D. corywtbosus, 

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

 to Kjellman, it shall not always be independant, approa- 

 chino- so nearly to D. hippuroides that it is difficult to draw 

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

 J). corymhosus too, as far as I am able to jndge, and even 

 between D. hippuroides and D. foeniculaems 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- 

 uons branches increasing in thickness upwards. The colour 

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

 brown. Dried specimens are more difficnlt 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 :wamed species, ^nd iiioi-e 



pnmerous. 



