KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 261 



f. linearis Foslie. 



Ai'ct. Havalg. p. 9. 

 Descr. Punctaria plautaginea [j. linearis Foslie, 1. c. 



Syn. Punctaria plantaginea Dickie, Alg. Cumberl. p. 237. 



« » Kjellm. Spetsb. Thall. 2. p. 42; Algenv. Murm. Meer. p. 48. 



» )) Kleen, Nordl. Alg. p. 39. 



Habitat. The typical form of this species grows in the Norwegian Polar Sea, 

 soinetimes on the upper part of the sublitoral zone in 2 — 5 fathoms, sometimes in 

 rock-pools in the litoral zone. In other parts of the Polar Sea I have always found 

 it sublitoral within the formation of Laminariacece. It is usually attached to small stones 

 or shells. It seems to prefer sheltered localities and always occurs in small number at 

 one and the same place. At Spitzbergen and Novaya Zemlya it has been collected 

 with zoosporangia in July, at Nordlanden in June. At Finmarken it was found in a state 

 of dissolution in the middle of September. The form linearis grows according to Foslie 

 at a depth of 2 — 4 fathoms, attached to small stones and shells. Specimens taken in 

 August were fuUy developed and provided with zoosporangia. 



Geogr. Distrib. Known only from those parts of the Polar Sea which lie north 

 of the Atlantic. The typical form has not been found abundant anywhere here. But 

 f. linearis was plentiful in the locality where it was met with. The northernmost point 

 of this species is Skansbay at Spitzbergen Lat. N. 78° 31'. 



Localities: The Norioegian Polar Sea: Nordlanden (f. typica) pretty commonly 

 dispersed, but scarce; Finmarken (f. typica) local and scarce at Öxfjord; (f. linearis) 

 abundant at Russemark in Porsangerfjord. 



Tlie Greenlancl Sea: the west coast of Spitzbergen, rare and very scarce. 



The Murman Sea: rare and very scarce on the west coast of Novaya Zemlya. 



Baffin Bay: Cumberland Sound, probably rare, according to Dickie 1. c. 



Fam. DESMARESTIACE/E (Thur.) Kjellm. 



Pl. Scand. p. 10; Thur. in Le Jol. Liste Alg. Cherb. p. 10 et 21; lim. mut. 



Gen. Desmarestia (Lamour.) Geev. 



Alg. Brit. p. XXXIX; Lamour. Ess. p. 43; spec. excl. 



Desmarestia aculeata (L.) Lamour. 

 1. c. p. 45. Fucus aculeatus L. Spec. Pl. Ed. 2, p. 1632. 

 Descr. Desmarestia aculeata J. G. Ag. Spec. Alg. 1, p. 167. 

 Fiy. » » Harv. Phyc. Brit. t. 49. 



ExsicG. » " Akesch. Alg. Scand. exsicc. N:o 87. 



Syn. Desmarestia aculeata J. G. Ag. Progr. p. 2; Bidr. p. 11; Till. p. 28; Grönl. Alg. p. 110. 

 » » Aresch. Phyc. Scand. p, 347. 



» » AsHM. Alg. Hayes, p. 96. 



» » Croall, Fl. Disc. p. 457. 



