250 KJELLMAN, THE ALG OF THE ARCTIC SEA. 
Syn. Chordaria flagelliformis Ksetum. Vinteralgv. p. 64; Spetsb. Thall. 2, p. 28; Algenv. Murm. Meer. p. 41. 
» » KLEEN, Nordl. Alg. p. 34. 
» » LinpBu. Bot. Not. p. 157. 
» » Nyl. et Sxl. Herb. Fenn. p. 73. 
» » Post. et Rupr. Ill. Alg. p. Il. 
» » ZELLER, Zweite d. Polarf. p. 84. 
Fucus flagelliformis We. Fl. Lapp. p. 505. 
Remark on the synonymy. The alga set down by Gost 1. c. as Ch. divaricata, 
judging by the specimen kindly communicated to me by Gost, is not of that species, 
but a Ch. flagelliformis. It is most nearly related with that form of this species which 
I have called f. ramusculifera, though by its slenderness and loose consistency it approaches 
also f. subsimplez. I have found a form very nearly coinciding with that collected 
by Gost, in the eastern part of the Murman Sea, and in my account of the marine 
vegetation of that sea I have recorded it as an intermediate form between the two 
just-mentioned ones. 
Habitat. From the Norwegian Polar Sea only the typical form of the present 
species is known. It occurs here sometimes litoral, sometimes sublitoral, fastened 
partly to other alge, as Halosaccion ramentaceum, Fucus serratus a. 0., partly to stones. 
In other parts of the Polar Sea J have always found it within the sublitoral zone, but 
in the upper part of it. It is met with both on exposed and sheltered coasts and in 
the Norwegian Polar Sea is occasionally gregarious. The typical form on the north coast 
of Norway bears zoosporangia during the whole summer, at least to the middle of 
September. At Spitzbergen I have found this form provided with such organs in August, 
and on the west coast of Novaya Zemlya at the end of June and the beginning of 
July. The form chorde@formis has been taken with zoosporangia at Spitzbergen in January, 
February, May, July, August, and December, at the west coast of Novaya Zemlya 
during the earlier part of July; f. ramusculifera on the north coast of Spitzbergen in 
July and August, f. subsimplex at Spitzbergen at the end of August and the commence- 
ment of September. 
Geogr. Distrib. The present species has been found in the Arctic Sea proper at 
several places at very different longitudes, but nowhere in any considerable numbers. 
Its maximum of frequency is situate to the south of that region. The most northern 
point where it has been taken is Discovery Bay on the west coast of Greenland, Lat. 
N. 61° 40. 
Localities: The Norwegian Polar Sea: (f. typica) Nordlanden common and abundant; 
Finmarken common and pretty abundant, as at Maasd, Gjesver, the south coast of 
Mageré, and Talvik. 
The Greenland Sea: the east coast of Greenland at Sabine Isle (?); the west and 
north coasts of Spitzbergen, local and scarce. All the forms recorded have been found 
at Spitzbergen. 
The Murman Sea: the coast of Russian Lapland (f. typica), probably common; 
the west coast of Novaya Zemlya (f. typica, f. chordwformis, and a form intermediate 
between f. ramusculifera and f. subsimplev) rather generally dispersed, but scarce. 
