- 169 — 



Diet vo siphon Chordaria Aresch. Obs. phyc. 3, Reinke Algenflora der 

 westlichen Ostsee p. 63, Rosenv. Grl. Havalg. p. 861 ; Goilonema Chordaria 

 Strömf. Algveg. p. 51. 



f. typica has only been found in one place in SW. Iceland growing 

 at low-water mark. 



f. elongata Strömf. Om Algvegetationen i Finlands sydvestra skärgärd l ) 

 p. 130, Strömf. Algveg. p. 51 ; Dictyosiphon Chordaria f. dumontioides 

 Rosenv. Grl. Havalg. p. 861. 



It has only been found by Strömfeit in one place in E. Iceland in a 

 depth of 1—2 fathoms. As pointed out by Rosenvinge this form habitually 

 resembles Dumontia filiformis. The few ramifications arising from the 

 main axis are usually wholly unbranched and attain a considerable length ; 

 in the Icelandic specimens they are about 50 cm. long, in the Greenlandic 

 above 60 cm. Like the Greenlandic plants the Icelandic have somewhat 

 thicker frond than the f. typica. 



As the Icelandic specimens agree in every thing with the Greenlandic 

 plants I have no doubt that the f. elongata Strömf. and the f. dumontioides 

 Rosenv. are identic, and as the former name is the older it ought to 

 be preserved. 



E. I c el. Eskifjöröur (Strömfeit). 

 SW. I c el. Einarslön. 



Dictyosiphon corymbosus Kjellm. Arct. Alg. p. 267 ; Strömf. Algveg. 

 p. 51 . 



Only found by Strömfeit in one place in a depth of 1—3 fathoms. 

 With sporangia in August. 



N. I c el. Arnarnes (Strömfeit). 



Dictyosiphon hippuroides (Lyngb.) Kiitz., Kjellm. Arct. Alg. p. 268; 

 Strömf. Algveg. p. 51. 



I have only seldom met with this species. It occurs in the litoral 

 region, and has been gathered with sporangia in July and October. Some 

 specimens, I met with at Broddanes, resembled somewhat D. corymbosus 

 and belong probably to that species. 



N. I c el. Skagafjöröur (Grönlund). 



NW. Icel. Rroddanes; Isafjöröur (Strömfeit) cast ashore. 

 SW. Icel. Reykjavik (Grönlund); Skerjafjöröur. 

 S. Icel. Eyrarbakki (Strömfeit). 



J ) Bidrag till kännedomen af Finlands natur och folk. 39. Heftet, Helsingfors 

 1884. 



