KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 20. N:0 5. 1^5 



Syn. Ascopbyllum nodosum GoBi, Algenfl. Weiss. Meer. p. 52. 



Fucodium nodosum J. G. Ag. Spetsb. Alg. Till. p. 27, 28 et 31; Gröiil. Alg. p. 110. 

 Fucus nodosus Croall, Fl. Disc. p. 457. 



» » DicKiE, Alg. Sutlierl. 1, p. 140; Alg. Cumberl. p. 236. 



» .) GuNN. Fl. Noi-v. 1, p. 83. 



» )) Post. et Rupr. 111. Alg. p. II. 



B » Nyl. et Sael. Herb. Fenn. p. 73. 



» » Wg. Fl. Lapp. p. 499. 



Halicoccus nodosus Aiiesch. Phyc. Scand. p. 254. 



» » Kleen, Nordl. Alg. p. 31. 



Halidrys nodosa Lyngb. Hydr. Dan. p. 37. 

 Ozothallia nodosa Kjellm. Spetsb. Thall. 1, p. 3. 



Hahitat. On the arctic coast of Norvvay this specics is litoral, occupying iiearly 

 the middle part of" the litoral zone. It occiirs on exposed coasts as well as in tlie 

 interiör of deep bays, but seenis to prefer such places as are sheltered from the vio- 

 lence of the waves. It is gregarious, occurring in some places in raore considerable 

 niasses than other Fucacece. It generally grows mixed with such algaö. I have 

 found specimens with plenty of receptacles in July and the earlier part of August on 

 the coast of Finmarken. It was always sterile here in the latter part of August, but 

 new receptacles begau to be formed at the beginning of October. Accordingly, it ap- 

 pears to fruit here at least twice a year, probably even more often. Le Jolis states 

 t hat it bears receptacles in winter on the coast of France. At Bohuslän it commences to 

 develop such organs in March and April, the period of fructification ending in June. 

 Cp. Aresch. 1. c. 



Geogr. Distrib. I cannot state at present any certain limits for its distribution in 

 the Arctic Sea. It is known with certainty to occur in the Norwegian Polar Sea, the 

 western Murman Sea, the White Sea, and BafSn Bay. The alga is also reported from the 

 eastern Greenland Sea, but it does not appear to be quite sure that it really grows 

 there. It was brought home from there by the Swedish expedition of 1868, and said 

 to be collected at several places, as Icefjord, Smeerenberg Bay, Kobbebay, and the bays 

 on the north coast. I have had the opportunity of examining the three tirst-mentioned 

 localities, but I failed to detect any traces of this plant. But it was found wash-ed 

 ashore at South Cape, where however it had probably been carried from the south. I 

 saw it floating on the surface of the sea at several places between Norway and Spitz- 

 bergen. The opinion that it does not grow on the coasts of Spitzberg is supported by 

 the fact of its not having been observed on the west coast of Novaya Zemlya, whose 

 Flora resembles that of Spitzbergen so nearly. Already in the White Sea this plant 

 is rarer than on the north coast of Norway, and east of that Sea, on the coast of 

 Cisuralian Samoyede-land, it has not been found at all. Certainly it reaches its maxi- 

 mum of frequency on the north coast of Norway. The most northern place where it 

 is said to have been found, is the north coast of Spitzbergen. 



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

 amt, common and abundant at the town of Tromsö, at Renö and Carlsö; Finmarken: 



