146 KJELLMAN, THE ALGA OF THE ARCTIC SEA. 
Euthora cristata Dioxin, Alg. Sutherl. 1, p. 142; Alg. Cumberl. p. 238. 
» » Katon, List, p. 44. 
» » Gost, Algenfl. Weiss. Meer. p. 33. 
» » Harv. Ner. Am. 2, p. 150. 
> » KJELLM. Vinteralg. p. 64; Spetsb. Thall. 1, p. 16; Algenvy. Murm. Meer. p. 16; 
Kariska hafvets Algv. p. 20. 
» » KuegeEn, Nordl. Alg. p. 17. 
Fucus coccineus 6 pusillus We. Fl. Lapp. p. 500. 
»  eristatus SomMERF. Suppl. p. 184. 
» » gigartinus Gunn. Fl. Norv. 2, p. 106; fide syn. 
Nereidea cristata Rupr. Alg. Och. p. 255 sub Nereidea fruticulosa. 
Rhodymenia cristata Argscn. Phye. Scand. p. 299. 
» » Nyl. et Sel. Herb. Fenn. p. 74. 
» » Post. et Rupr. Ill. Alg. p. II. 
Habitat. In the Arctic Sea this alga is generally sublitoral or elitoral. According 
to KiErn it sometimes occurs at Nordlanden in rock-pools within the litoral zone. It 
prefers an open coast, though it may enter also into deep bays. It is usually attached 
to larger algw, as Laminaria digitata, Ptilota pectinata, Delesseria sinuosa and Litho- 
thamnia, more seldom to stones or shells. In most places it grows scattered, with 
isolated specimens. In the western part of the Kara Sea f. angustata was found gre- 
garious in rather great masses. At Spitzbergen it continues to develop all the year 
round. I have found it at Musselbay growing and bearing sporocarps during the 
winter, although it attains here its honest development during the summer and the 
autumn. It has been found with sporocarps at Nordlanden during the whole summer, 
at Finmarken in August and September, at Spitzbergen in July and in January, on 
the west coast of Novaya Zemlya in July; with tetrasporangia at Nordlanden during 
the whole summer, at Finmarken in September, at Spitzbergen in July, in the White 
Sea at the end of June and the beginning of July. It seems thus as if this species 
could develop sporocarps in the Arctic Sea all the year round, but tetrasporangia 
chiefly during the summer. 
Geogr. Distrib. It belongs to the Atlantic as well as the arctic region, and is 
widely distributed in the latter. However it is not known as yet from the Siberian 
Sea. I have found it most abundant in the eastern part of the Kara Sea. Its northern- 
most locality is Treurenberg Bay on the north coast of Spitzbergen, Lat. 79° 56’ N. 
Localities: The Norwegian Polar Sea: Nordlanden, common, though not abundant; 
Finmarken scattered, but pretty plentiful, at Maasé, Gjesveer, the south coast of Mageré, 
Oxfjord and Talvik. 
The Greenland Sea: at several places on the west and north coasts of Spitzbergen, 
but everywhere scanty. 
The Murman Sea: the coast of Russian Lapland and Cisuralian Samoyede-land, 
Kolgujev Isle, the west coast of Novaya Zemlya and Waygats, at the last-mentioned 
places scattered and rare. 
The White Sea: pretty common. 
a 
