246 



sheltered localities. Though it certainly has its typical appearance when growing in 

 rock-pools, it is always low-sized at such places, 1 — 2 feet long. In deeper water 

 the typical form even at Finmarken attains a considerable length, even two metres and 

 a half. The typical form bears zoosporangia in August on the north coast of Norway. 

 On the north coast of Spitzbergen I have collected specimens of f. subtomentosa with 

 zoosporangia in course of development in the month of August, and on the west coast 

 of Novaya Zemlya specimens with ripe zoosporangia were taken in September. 



Geogr. Distrib. This species seems to be widely disseminated in the Arctic Sea, 

 but it is only on the coast of Norway that it is met with in any considerable number. 

 Its maximum of frequency is situate south of the Polar Circle. It is not known from 

 the Kara and Siberian Seas. The northernmost point where it is certainly found is 

 Fairhaven on the north-west coast of Spitzbergen Lat. N. 79° 49'. 



Localities: The Norwegian Polar Sea: Nordlanden common and abundant; Tromso 

 amt, common and abundant about the town of TromsO; Finmarken at Maaso, Gjesvser, 

 Oxfjord, and Talvik, pretty common and plentiful. 



The Greenland Sea: the west coast of Spitzbergen, local and scarce. 



The Murman Sea: the coast of Russian Lapland; the west coast of Novaya Zemlya, 

 local, scarce. 



The White Sea: rather rare. 



The American Arctic Sea: the north coast of Western Eskimaux-land. 



Baffin Bay: the west coast of Greenland: Tessarmiut, Unartok, Neuherrnhut, 

 Godthaab, Kapiselik, Godhavn, Sakkak, and Waygats Strait. 



The typical form is known from the north coast of Norway and the west coast 

 of Greenland; f. erassipes from the north coast of Norway (MaasO). At Spitzbergen 

 and Novaya Zemlya I have found a form that resembles most nearly f. subtomentosa. 



Chorda tomentosa Lyngb. 



Hydr. Dan. p. 74. 



Desor. Chorda tomentosa Aresch. Obs. Phyc. 3, p. 14. 



Fig. » » Lyngb. 1. c. t. 19, fig. A. 



Ewsicc. » » Aeesch. Alg. Scand. exsicc. N:o 93. 



Habitat. With regard to the habitat of this species, the reader is referred to 

 Aresch. Obs. Phyc. 1. c. 



Locality: It is said by Akeschoug to have been taken in the Norwegian Polar 

 Sea at East Finmarken in Engelsvigen. 



