Contribution. I. 103 



Descr. Dictyosiphon (Coilonema) chordaria Aresch. Obs. Phyn. 3, p. 32. 

 Fig. „ chordaria Aresch. Phyc. Scand. t. 8, B. 



Syn. Dictyosiphon (Coilonema) Finmarkicum Fosl. Arct. havalg. p. 6* 



A litoral plant, in general occurring in rock-pools in the 

 upper part of the zone, on open coast. Large and well de- 

 veloped specimens have been collected at Vardo, attaining a 

 length of 25 cm. It bears zoosporangia in August. The 

 plant described by me some years ago (1. c.) under the name 

 of Dictyosiphon (Coilonema) Finmarkicum is identic with the 

 above quoted form of the present species. 



Distribution: Found at Svserholt, local and rather scarce, 

 Vardo, local but abundant, and at Bugonaes, rare. 



Coilonema filiformis Fosl. 



in Tromso Mus. Aarsh. 10, p. 178. 

 Descr. Coilonema filiformis Fosl. 1. c. 

 Fig. „ „ * „ t. 3, fig. 1-2. 



This species seems to .be well differentiated. However 

 the specimens at my disposal are rather few and badly pre- 

 served, found among earlier collections from Finmarken. The 

 plant is litoral, growing in rock-pools in somewhat exposed 

 localities. I have only a couple of barren specimens from 

 East-Finmarken, but at West-Finmarken it has been taken 

 with zoosporangia at the end of June. 



Distribution: Only found at Berlevaag, very rare. 



Gen. Dictyosiphon (Grev.) Aresch. 

 Bot. Not. 1873, p. 164; Grev. Alg. Brit. p. 55; char. mut. 



Dictyosiphon corymbosus Kjellm. 



N. Ish. Algfl. p. 330. 

 Descr. Dictyosiphon corymbosus Kjellm. 1. c. 

 Fig. „ „ „ „ t. 26, fig. 12—15. (f. abbreviata). 



I met with some few specimens of a Dictyosiphon, which 

 I think are to be referred to this species and seem to 1?$ 



