156 KJELLMAN, THE ALGiE OF TIIE ARCTIC SEA. 



at a depth of 1 — 4 fathoms, whereas the larger and inore vigorous pelagic forras are 

 often met Avith at a depth of 6 — 10 fathoms. The litoral form, f. densa, occurs gre- 

 garious, the others grow scattered, often constituting an element of the the Laminariacce- 

 forraation. 



On the north coast of Spitzbergen the plant is to be found during the whole 

 winter, partly with the prolifications fallen off — this is often the case — , partly with 

 prolifications in coiirse of development from the remaining portions — this is the case 

 especially in March — , partly with older prolilications remaining and furnished with 

 tetrasporangia. However, it reaches its highest development at Spitzbergen in July and 

 August and at this season is also most richly provided with ripe tetrasporangia. At 

 Spitzbergen specimens with tetraspoi-angia have been collected in April, July, August, 

 October, November and December, on the west coast of Novaya Zemlya in July, on 

 the north coast of Norway in July and August, in the Siberian Sea in September, on 

 the west coast of Greenland in February. With regard to those peculiar outgrowths 

 resembling nemathecia which are sometimes to be found in this plant, and the nature 

 of which I am as yet unable to explain, I refer to my paper on the Floridece of Spitz- 

 bergen (Spetsb. Thall. 1, p. 18). 



Geogr. Distrib. This species is circumpolar. It has its maximum of frequency 

 in the northern part of the Norwegian Polar Sea, the eastern part of the Greenland 

 Sea and the eastern part of the Murman Sea. The collections of alga? from Greenland 

 contain a considerable number of individuals of this species, so that it may be supposed 

 to be comraon and abundant there. Already in the southern part of the Norwegian 

 Polar Sea it is scarce. The most northerly place where it has been found is Low Is- 

 land on the north coast of Spitzbergen, Lat. N. 80° 20'. 



Localities: The Norwegian Polar Sea: Nordlanden, local and scarce; Tromsö amt 

 at Renö; Finmarken at Maasö, Gjesva3r, the south coast of Magerö, Oxfjord, Talvik, 

 common and abundant; at Vardö and Vadsö according to Gunnerus 1. c. 



The Greenland Sea: common and abundant along the west and north coasts of 

 Spitzbergen. 



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

 and Waygats from Matotshin Shar to Jugor Shar, common and pretty abundant. 

 The White Sea: rather local and scarce. 



The Kära Sea: Cape Palander and Actinia Bay, local and rather scarce. 

 The Siberian Sea: Irkaypi, Koljutshin Isle, and Pitlekay, scanty, but pretty common. 

 The American Arctic Sea. Cp. Harvey, 1. c. 



Baffin Bay: Cumberland Sound, pretty abundant; the west coast of Greenland: 

 Nanortalik, Smallesund, Neuherrnhut, Godthaab, Sukkertoppen, Holstenborg, Disco 

 Island, Jakobshavn, Sakak, Rittenbenk, Whale Island (washed ashore), Lat. N. 73° 26' 

 and (?) in Smith's Sound between Lat. N. 78 and 82°, if, as 1 suppose, the plant 

 reported from there by Ashmead under the name of Soliera chordalis is some form 

 or other of Halosaccion ramentaceurn. 



