KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. wN:0 5. 261 
f. linearis, Fosure. 
Arct. Havalg. p. 9. 
Descer. Punctaria plantaginea (3. linearis Fosuin, |. c. 
Syn. Punctaria plantaginea Dickie, Alg. Cumberl. p. 237. 
» » KyeLLM. Spetsb. Thall. 2, p. 42; Algenv. Murm. Meer. p. 48. 
» » KuEEN, Nordl. Alg. p. 39. 
Habitat. The typical form of this species grows in the Norwegian Polar Sea, 
sometimes 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 Laminariacee. 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 Fosiie 
at a depth of 2—4 fathoms, attached to small stones and shells. Specimens taken in 
August were fully 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 Norwegian Polar Sea: Nordlanden (f. typica) pretty commonly 
dispersed, but scarce; Finmarken (f. typica) local and scarce at Oxfjord; (f. linearis) 
abundant at Russemark in Porsangerfjord. 
The Greenland 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 |. ec. 
Fam. DESMARESTIACE (Tuur.) Ksetim. 
Pl. Scand. p. 10; Tour. in Le Jou. Liste Alg. Cherb. p. 10 et 21; lim. mut. 
Gen. Desmarestia (LAmour.) GreEv. 
Alg. Brit. p. XXXIX; Lamour. Ess. p. 43; spec. excl. 
Desmarestia aculeata (L.) Lamour. 
l. c. p. 45. Fucus aculeatus L. Spec. Pl. Ed. 2, p. 1632. 
Descr. Desmarestia aculeata J. G. AG. Spec. Alg. 1, p. 167. 
Fig. » » Harv. Phyc. Brit. t. 49. 
Exsice. » » ArEscH. Alg. Scand. exsicc. N:o 87. 
Syn. Desmarestia aculeata J. G. Ac. Progr. p. 2; Bidr. p. 11; Till. p. 28; Gronl. Alg. p. 110. 
» » ArescH. Phye. Seand. p, 347. 
» » Asum. Alg. Hayes, p. 96. 
» » Croat, Fl. Dise. p. 457. 
