KONGL. SV. VET. AKADEMIENS ITANDLINGAR. BAND 20. N:0 5. 145 
attached to the algw together with which it grows, as Laminariacea, Delesseria sinuosa 
Ptilota pectinata a. o. It is most vigorously and typically developed on exposed coasts, 
but enters also into deep bays, where however not seldom it assumes an appearance 
very different from the pelagic form. I have figured such a specimen from the interior 
of Altenfjord on the coast of Finmarken tab. 12. Sometimes it is found gregarious in 
quite large masses, but in general it constitutes a subordinate element in certain for- 
mations, such as those of the Laminariace@ and Corallinew. At Nordlanden it bears 
sporocarps in July and August, on the west coast of Novaya Zemlya at the end of 
June and in July, at Spitzbergen in August. I have taken individuals with tetraspo- 
rangia at Novaya Zemlya in July. 
Geogr. Distrib. It belongs to the Atlantic as well as the arctic region of the 
Polar Sea, being widely spread within the latter. However, it reaches its maximum of 
frequency in the northern part of the Norwegian Polar Sea and in the White Sea. 
The most northern locality where it is known with certainty to grow, is the group of 
islands on the north-western coast of Spitzbergen, Lat. 79° 50' N. 
Localities: The Norwegian Polar Sea: Nordlanden, pretty common and abundant; 
Finmarken, pretty common, abundant at Maasé, Gjesver and in Mageré sound, scarce 
at, Talvik. 
The Greenland Sea: scarce and local on the coast of Spitzbergen. 
The Murman Sea: Russian Lapland and the coast of Cisuralian Samoyede-land; 
the west coast of Novaya Zemlya, local but, pretty plentiful. 
The White Sea: common and abundant. 
Bafjin Bay: in several places on the western coast of Greenland, as Tessarmiut, 
Lichtenau, Julianeshaab, Friderichshaab, Godthaab, Egedesminde, Whale Islands; pro- 
bably pretty abundant everywhere. 
Gen. Euthora J. G. Aa. 
Alg. Liebm. p. 11; Spec. Alg. 2, p. 383. 
Euthora cristata (L.) J. G. Aa. 
]. ec. Fucus cristatus Lin. in Turn. Hist. Fue. 1, p. 48. 
f. typica. 
Descr. Huthora cristata J. G. Ac. Epicr. p. 360. 
Fig. Rhodymenia cristata Harv. Phye. Brit. t. 307. 
Eesice. Kuthora cristata Arescu. Alg. Seand. exsice. N:o 308. 
f. angustata LYNGs. 
Hydr. Dan. p. 13. 
Deser. Sphzerococcus cristatus @ angustatus. Lynas. |. ec. 
Syn. Kuthora cristata J. G. Ac. Spetsb. Alg. Progr. p. 3; Bidr. p. 11; Gronl. Alg. p. 111. 
» » Croan, Fl. Dise. p. 459. 
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K. Vet. Akad. Handl. Bd 20, N:o 5, | ] 
