312 KJELLMAN, THE ALG OF THE ARCTIC SEA. 
f. typica. 
Descr. Conferva melagonium Wes. et Monr. |. c. 
Fig. Chetomorpha Picquotiana Kurz. Tab. Phye. 3, t. 58. 
Eesice. » melagonium Wirrr. et Norpsr. Alg. exsice. N:o 415. 
f. rupincola ARESCH. 
Conferva melagonium var. rupincola Argscu. Alg. Scand. exsice. N:o 275, a. 
Descr. Conferva melagonium Harv. Phye. Brit. t. 99, A. 
Fig. Chetomorpha melagonium Kiz. Tab. Phye. 3, t. 61. 
Eesicc. Conferva melagonium var. rupincola AREscH. 1. c¢. 
Syn. Cheetomorpha melagonium Dickie, Alg. Cumberl. p. 239. 
» » Gos, Algenfl. Weiss. Meer. p. 87. 
» » Kyetim. Algenv. Murm. Meer. p. 56. 
» » Kuren, Nordl. Alg. p. 45. 
» » ZELLER, Zweite d. Polarf. p. 83. 
Conferva linum Post. et Rupr. Ill. Alg. p. II, Cfr, Gost, 1. ec. 
» melagonium J. G. Ac. Progr. p. 2; Bidr. p. 11; Grénl. Alg. p. 110. 
» » CroaLu, Fl. Disc. p. 461. 
» » Dickie, Alg. Sutherl. 1, p. 143; 2, p. 192; Alg. Walker, p. 86. 
» » Eaton. Liste, p. 44. 
» » KseLio. Vinteralgv. p. 65; Spetsb. Thall. 2. p. 56; Kariska hafvets Algv. p. 29. 
» » LinpBL. Bot. Not. p. 158. 
» » Lyner. Hydr. Dan. p. 148. 
» » Nyx. et San. Herb. Fenn. p. 75. 
» » Wirtr. in Heugl. Reise, p. 284. 
Habitat. The form rupincola is litoral, growing in rock-pools or on rocks cover- 
ed with sand. The typical form, on the contrary, is always sublitoral, occurring in 
2—15 fathoms water, chiefly on gravelly bottom. It grows sometimes on exposed 
coasts, sometimes in sheltered localities, attached to stones or (more seldom) to alge. 
I have myself always found it scattered, but the large quantities of it brought home 
from Greenland seem to indicate that it occurs gregarious there, at least in certain 
places. On the north coast of Spitzbergen it develops during the whole winter. I 
have seen specimens with zoospores in July at Finmarken. 
Geogr. Distrib. The present species is circumpolar and apparently attains its 
maximum of frequency in Baffin Bay. The most northerly locality where it has been 
found, is Discovery Bay in Smith Sound Lat. N. 81° 41’. 
Localities: The Norwegian Polar Sea: Nordlanden (f. typica and f. rupincola) local 
and scarce; Finmarken at Maasé, f. rupincola rather common and abundant, f. typica 
local and scarce. 
The Greenland Sea: (f. typica) commonly distributed, but not abundant on the 
coast of Spitzbergen; Sabine Island on the east coast of Greenland. 
The Murman Sea: Russian Lapland and the coast of Cisuralian Samoyede-land ; 
commonly spread, but scarce on the west coast of Novaya Zemlya and Waygats (f. 
typica.) 
The Kara Sea: Uddebay, Cape Palander, and Actinia Bay (f. typica). 
