294 KJELLMAN, THE ALG^ OF THE ARCTIC SEA. 



Habitat. In the Norwegian Polar Sea this species is literal, attached to stones, 

 growing scattered in sheltered localities. I have collected individuals with zoospores 

 (garnets) in September on the coast of Finmarken. 



Geogr. Distrib. It is known with certainty from the Norwegian Polar Sea, in 

 the northern part of which it is scarce, and from Baffin Bay. As I do not know if 

 U. latissima Schubel. 1. c. is to be referred to this species, I cannot decide whether it 

 occurs in the Murinan Sea. I never observed it there myself. The most northerly 

 place where it is as yet certainly know-n to grow is Oxfjord on the coast of Finmarken 

 about Lat. N. 70°. 



Localities: The Noricegian Polar Sea: Nordlanden probably common and rather 

 abundant; Finmarken local and scarce at Oxfjord and Talvik. 



The Murman Sea: (?). 



Baffin Bay: the west coast of Grreenland near Godhavn according to specimens 

 in the herbarium of the Copenhague Museum. 



Gen. Monostroma (Thuii.) Wittr. 



Mouostr. p. 15; Thlr. Note s. Ulv. p. 29, sec. Wittr. 1. c; lim. mut. 



Monostroma latissimum (Kutz.) Wittr. 



Monostr. p. 33. Ulva latissima Kutz. Phjc. gener. p. 296. 

 Descr. Monostroma latissimum Wittr. 1. c. 

 Fig. » » » » t. 1, fig. 4. 



Evsicc. » » Wittr. et Nordst. Alg. exsicc. N:o 145. 



Syn. Monostroma arcticum Kleen, Nordl. Alg. p. 41; sec. spec; ex parte. (?). 

 » latissimum Kleen, Nordl. Alg. p. 41 (?); ex parte(?;. 



Remark on the synonymy. Kleen records M. latissimum in Nordl. Alg. The spe- 

 cimens of his collections which bear this name, do not however belong to the present 

 species but to M. saccodeum. On the contrary that alga which is called M. arcticum 

 in his collections, is in fact M. latissimum. Of J/, arcticum no specimens are to be 

 found there. It is certain, accordingly, that M. latissimum really exists at Nordlanden, 

 but it is uncertain whether it is included under this name in Nordl. Alg. and whether 

 Kleen has really found M. arcticum. His statement of its occurrence in brackish water, 

 directly contrary to my own observations, seems to show that he has confounded M. 

 arcticum and M. latissimum. Still it is possible that M. arcticum, which is rather 

 common in Finmarken at certain places, is really to be found in Nordlanden, and that 

 Kleen's determination is correct, although the specimens collected have happened after- 

 wards to be confounded. 



Habitat. There is nothing known with certainty about the habitat of the present 

 species in the Polar Sea. If ^[. arcticum Kleen Nordl. Alg. should be exclusively the 

 present species, this would be a brackish-water alga at Nordlanden, as it is often else- 

 where, growing in the lower part of the sublitoral zone, attached to other algas. 



