KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 307 



Gen. Cladophora Kutz. 



Phyc. gener. p. 262. 



Cladophora Ru pestris (L.) Kutz. 



Phyc. gener. p. 270. Conferva rupestris L. Spec. Pl. p. 1167. 



Beser, et Fig. Cladophora rupestris Harv. Phyc. Brit. t. 180. 

 E.vsicc. Conferva rupestris Aresuh. Alg. Soand. exsicc. N:o 126. 

 Syn. Cladophora rupestris Dickie, Alg. Sutherl. 1, p. 143. 



» » GoBi, Algenfl. Weiss. Meer. p. 84. 



» » K.JELLM. Algenv. Murm. Meer. p. 53. 



Conferva » J. G. Ag. Grönl. Alg. p. 110. 



» » Aresch. Phyc. Scand. p. 420. 



» I) Nyl. et S.BL. Herb. Fenn. p. 75. 



» » Post. et Rupr. 111. Alg. p. II- 



» » Wg. Fl. Lapp. p. 512. 



Hahitat. This species is usually litoral, growing withiii tlie forinatioii of Fuca- 

 cece, soraetiraes sublitoral, attaclied to stories, inore seldom epiphytic on alga>. It oc- 

 curs both on exposed and on sheltered coasts, hut is more luxuriarit and inore typi- 

 cally developed in unprotected localities. It is gregarious, but not in very great mas- 

 ses. Specimens with zoospores have been found on the coast of Finmarken at the 

 end of August. 



Geogr. Distrih. It is known from the Polar Sea north of the Atlantic and has 

 its maximum of frequency in the Norwegian Polar Sea. The most northerly point 

 where it has been taken is on the west coast of Novaya Zemlya. 



Localities: The Norwegian Polar Sea: Nordlanden common and abundant; Tromsö 

 ärat at Tromsö and Renö; Finmarken rather common and abundant at Maasö, Gjesvasr, 

 Öxfjord, and Talvik. 



The Murman Sea: Russian Lapland and the coast of Cisuralian Samoyede-land; 

 the west coast of Novaya Zeinl^^a according to Gobi; the west coast of Waygats, only 

 a single specimen known. 



The White Sea: i'ather common and abundant. 



Bajjin Bay: the west coast of Greenland at Fiskerntus, Sukkertoppcn, Claushavn, 

 and Godhavn. 



Cladophora Diffusa (Roth) Haiiv. 

 Phyc. Brit. t. 130. Conferva diffusa Eoth, Cat. Bot. 3, p. 207. 

 Descr. et Fiy. Cladophora diffusa Hakv. 1. c. 



Syn. Cladophora diffusa K.iellm. Spetsb. Thall. 2, p. 54; Algenv. Murm. Meer. p. 54. 



Hahitat. This species grows sublitoral in 2- — 5 fathoins water on gravelly and 

 sandy bottom on exposed coasts. All the specimens from the Polar Sea that I have 

 seen were sterile. They wei'e collected during July, August, and September. 



Geogr. Distrib. It is nowhere to be found in any considerable number within 

 the Polar Sea. I have seen it more abundant on the coast of Finraai-ken than any- 



