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



Gen. Oladophora Kutz. 



Phyc. gener. p. 262. 



Cladophora Rupestris (L.) Kutz. 



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



Descr. et Fig. Cladophora rupestris Harv. Phyc. Brit. t. 180. 

 Exsicc. Conferva rupestris Akesch. Alg. Scand. exsicc. N:o 126. 

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



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



" » Kjellm. Algenv. Murm. Meer. p. 53. 



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



» B Akesch. Phyc. Scand. p. 420. 



» » Nyl. et S^L. Herb. Fenn. p. 75. 



» » Post, et Eupe. 111. Alg. p. II- 



» .) Wg. M. Lapp. p. 512. 



Habitat. This species is usually litoral, growing within the formation of Fuca- 

 ce(e, sometimes sublitoral, attached to stones, more seldom epiphytic on algse. It oc- 

 curs both on exposed and on sheltered coasts, but is more luxuriant and more 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 Norvjeyian Polar Sea: Nordlanden common and abundant; Tromso 

 amt at Tromso and RenO; Finmarken rather common and abundant at Maas6, Gjesvajr, 

 Oxfjord, and Talvik. 



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

 the west coast of Novaya Zemlya according to Gobi; the west coast of Waygats, only 

 a single specimen known. 



The White Sea: rather common and abundant. 



Bajfin Bay: the west coast of Greenland at Fiskernses, Sukkertoppen, Claushavn, 

 and Godhavn. 



Cladophora Diffusa (Roth) Harv. 



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

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



Syn. Cladophora diffusa Kjellm. Spetsb. Thall. 2, p. 54; Algenv. Murra. Meer. p. 54. 



Habitat. This species grows sublitoral in 2 — 5 fathoms water on gravelly and 

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

 seen were sterile. They were 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 Finmarken than any- 



