236 KJELLMAN, THE ALG^ OF THE ARCTIC SEA. 



angular, thin-walled cells of middle size, larger than in L. digitata, somewhat smaller 

 than in L. Clustoni. In no arctic Laminaria I have found the lamina to be so rich in 

 muciferous canals as in this species, and in none those canals are so small and so close 

 to the surface. J. G. Agaedh does not notice the presence of those organs in the stipe. 

 However, in the specimens I have examined, they occur also in this part, being here as 

 in the lamina small in size and situate immediately beneath the cortical layer. 



Habitat. In this respect nothing is known. According to J. G. Agardh the 

 specimens collected by Berggken at Sukkertoppen on the west coast of Greenland were 

 furnished with zoosporangia. The expedition in which Berggren took part stayed at 

 Sukkertoppen from 21 September to 21 October. Thus the species bears developed 

 zoosporangia in the earlier part of the autumn on the west coast of Greenland. 



Geogr. Distrib. Known only from Baffin Bay. 



Locality: the west coast of Greenland at Sukkertoppen. 



Laminaria fissilis J. G. Ag. 

 Lam. p. 18. 

 Descr. Laminaria fissilis J. G. Ag. L c. 



» » » Spetsb. Alg. Till. p. 28. 



Syn. Laminaria fissilis Kjellm. Algenv. Murm. Meer. p. 40. 



Remark on the species. As far as I can judge from my examination of some few 

 individuals, all of which were young, this alga is to be held a distinct species. It is 

 distinguished from Laminaria digitata by the intermediate layer of the lamina being 

 formed of large, rounded-angular, thin-walled cells and sharply defined from the dense 

 middle layer. By this characteristic it approaches L. nigripes, but it is known from 

 this species by the stipe wanting muciferous canals. In the lamina those organs are 

 smaller and more indistinct than in L. nigripes. 



Habitat. Those few specimens I have myself found grew in the interior of deep 

 bays on gravelly bottom in company with other Laminariacece. In the collections of 

 alga3 brought together at Spitzbergen by the Swedish summer-expedition of 1868 spe- 

 cimens with zoosporangia were found according to J. G. Agardh. 



Geogr. Distrib. Known from the eastern part of the Greenland Sea and the Mur- 

 man Sea. The most northern locality where it has been met with is the coast of Spitz- 

 bergen. 



Localities: The Greenland Sea: the coast of Spitzbergen. 



The Murman Sea: rare at Karmakulbay and at N. Gusinnoi Cape on the west 

 coast of Novaya Zemlya. 



Laminaria nigripes J. G. Ag. 



Spetsb. Alg. Till. p. 29. 

 Descr. Laminaria nigripes J. G. Ag. 1. c. 



» » » Gronl. Lam. och Fuc. p. 17. 



Fig. » » Tab. nostra 25, fig. 8—10. 



