236 KJELLMAN, THE ALG#® OF THE ARCTIC SEA. 
angular, thin-walled cells of middle size, larger than in L. digitata, somewhat smaller 
than in LZ. 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. AGarpu 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. Acarpu the 
specimens collected by Beraeren at Sukkertoppen on the west coast of Greenland were 
furnished with zoosporangia. The expedition in which BrerGGreNn 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. Ac. 1. ¢. 
» » »  Spetsb. Alg. Till. p. 28. 
Syn. Laminaria fissilis Ksntum. 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 Laminariacew. In the collections of 
alew brought together at Spitzbergen by the Swedish summer-expedition of 1868 spe- 
cimens with zoosporangia were found according to J. G. AGARpu. 
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. 
Deser. Laminaria nigripes J. G. Ac. 1. c. 
» » » Gronl. Lam. och Fue. p. 17. 
Fig. » » Tab. nostra 25, fig. 8—10. 
