KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. Q17 
Alaria grandifolia J. G. Ag. 
Grénl. Lam. och Fue. p. 26. 
Deser. Alaria grandifolia J. G. Ag. 1. c¢. 
» » KJELLM. Spetsb. Thall. 2, p. 10. 
Syn. Alaria esculenta Eaton, List, p. 44 (?). 
» » Keen, Nordl. Alg. p. 32 (2); fide syn. 
» grandifolia Kyerim. |. c. et Algenv. Murm. Meer. p. 35. 
Laminaria esculenta LinpBi. Bot. Not. p. 157 (?); Cfr. J. G. AG. Spetsb. Alg. Till. p. 30. 
Habitat. This species is sublitoral, living generally at a depth of 2—15 fathoms. 
It is met with in the interior of deep bays as well as on exposed coasts, in the latter 
case sometimes near the shore, sometimes, when the bottom is favourable, several miles 
off. It is on rocky bottom that it attains its greatest size. Living sometimes alone in 
rather great numbers, sometimes in company with other Laminariacea, it constitutes an 
essential element of the formation of Laminariacew on the coasts of Spitzbergen and the 
west coast of Novaya Zemlya. I often met with young, sometimes very young, individuals 
during the winter on the north coast of Spitzbergen. Only once or twice, in December 
and January, I succeeded in finding some older specimens. These then bore zoosporangia 
fully developed. Besides, I have collected specimens provided with zoosporangia at 
Spitzbergen in July, August, and September, on the west coast of Novaya Zemlya 
in July. 
Geogr. Distrib. This species has its maximum of frequency on the coasts of Spitz- 
bergen. It is found with certainty also in the eastern part of the Murman Sea. But 
the statement that it occurs on the north-west coast of Norway seems to me doubtful. 
It is possibly a large A. membranacea that has been identified by Kieren with J. G. 
Acarpu'’s A. grandifolia. The northernmost known locality of the species is Treuren- 
berg Bay on the north coast of Spitzbergen, Lat. N. 79° 56’. ‘ 
Localities: The Norwegian Polar Sea: Nordlanden (?). 
The Greenland Sea: the north and west coasts of Spitzbergen, common and plentiful. 
The Murman Sea: the west coast of Novaya Zemlya, local and probably rather scarce. 
Alaria dolichorhachis nob. 
A. stipite brevi, vix ultra pollicari spe breviore, terete; rhachide elongata, in planta senili fere pedali, 
apicem versus inerassata, supra sporophylla denuo contracta, in costam abrupte abeunte, compressa, in sectione 
transversali elliptica, usque ad basim cicatricibus sporophyllorum abjectorum elevatis, superne in marginem muri- 
culatum confluentibus insigni; costa prominula, in sectione transversali elliptica; lamina angusta, lanceolato-lineari, 
in costam breviter decurrente, rigidiuscula, undulato-plicata; sporophyllis primariis distantibus, ceteris approxi- 
matis, in planta adulta numerosis, fasciculatis, elongatis, pluripollicaribus, angustis, lineari-spathulatis, vulgo 
erispis, undulatis vel spiraliter contortis; soro sporophyllorum apicem longe marginemque anguste sterilem  relin- 
quente. Tab. 20, 21 et 25, fig. 11—18. 
Syn. Alaria esculenta Harv. Fl. West. Esk. p. 49 (?). 
' Description. The rhizines issue pretty regularly and in older individuals form two 
sometimes three, alternating whorls. Their length depends on the solidity of the 
substratum, the rhizines being shorter as the substratum is more solid. 
ag alah 28 
K. Vet. Akad. Handl. Band. 20. N:o 5. = 
