278 KJELLMAN, THE ALG OF THE ARCTIC SEA. 
and the forms distributed in Alg. Scand. exsicc. N:o 176 and 111. Undoubtedly Z£. 
siliculosus, {. penicillata Ac. belongs also to the same group of forms as Corticularia 
Negeliana. 
Habitat. The present species as here understood is usually litoral in the Norwe- 
gian Polar Sea, always sublitoral in the other parts of the Arctic Sea, as far as my 
observations go. It is attached sometimes to other alga, sometimes to stones. Certain 
forms of it sometimes occur gregarious in large masses on the coast of Norway. The 
species lives both on exposed and sheltered coasts. It bears reproductive organs, 
usually gametangia, in summer. 
Geogr. Distrib. It belongs properly to the Atlantic region of the Arctic Sea 
and attains here its maximum of frequency, occurring in several different forms. Within 
the proper Arctic region I have always found it very scarce, usually dwarfed, always 
in the typical form or such forms as are most nearly allied to this. Its most northerly 
point is Besselsbay in Smith Sound Lat. N. 81° 7’. 
Localities: The Norwegian Polar Sea: Nordlanden, all the forms recorded, ff. ty- 
pica, penicillata, and hiemalis being most common; Tromsé amt near the town of Tromsé, 
f. typica; Finmarken: Maasé, Gjesver, Oxfjord, and Talvik, ff. arcta, typica, and peni- 
cillata, the two last-named being most common and abundant. 
The Greenland Sea: Skansbay at Spitzbergen, f. typica, scarce. 
The Murman Sea: the coast of Russian Lapland and Cisuralian Samoyede-land, 
f. penicillata or forms most nearly approaching this; the west coast of Novaya Zemlya, 
f. typica, rare. 
The White Sea: cp. Gost 1. ¢. 
Bajiin Bay: Found floating off Holstenborg. Said to have been collected at 
Besselsbay by the English expedition under Nares. 
Ectocarpus pygmus ARESCH. 
in Kyetum. Skand. Ect. och Tilopt. p. 85. 
Descr. Ectocarpus pygmeus KJELLM. 1. ce. 
Syn. Ectocarpus pygmeus Kizen, Nordl. Alg. p. 38. 
Habitat. Found growing on shelly bottom at a depth of some fathoms. It has 
gametangia in July and August on the coast of Norway. 
Geogr. Distrib. Known only from the Norwegian Polar Sea. 
Locality: Nordlanden at Fleinver and two or three points at Lofoten. Cp. 
Keen, I. c. 
Ectocarpus draparnaldioides Crouan. 
Ale. Finist. N:o 24. 
Descr. Ectocarpus draparnaldioides Ksnium. Skand. Ect. och Tilopt. p. 37. 
Easice. » » Crovuan 1. ec. 
Syn. Ectocarpus draparnaldioides Kunen, Nordl. Alg. p. 38. 
