KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 20. N:0 5. 217 



Alaria grandifolia J. G. Ag. 

 Gröol. Lam. och Fuc. p. 26. 

 Descr. Alaiia grandifolia J. G. Ag. 1. c. 



» » Kjellm. Spetsb. Thall. 2, p. 10. 



iS)/n. Alaria esculenta Eaton, List, p. 44 (?). 



» » Kleen, Nordl. Alg. p. 32(?); fide syn. 



« grandifolia Kjellm. 1. c et Algenv. Miirrn. Meer. p. .3.5. 

 Laminaria esculenta Lindbl. Bot. Not. p. 157 (?); Cfr. J. G. Ag. Spetsb, Alg. Till, p. 30, 



Hahitat. This species is sublitoral, living generally at a depth of 2 — 15 fathoms. 

 It is raet witli in the interiör of deep bays as well as on exposed coasts, in the latter 

 case sometiraes near tlie shore, sometimes, when the bottora is favourable, several railes 

 off. It is on rocky bottom that it attains its greatest size. Living sometimes alone in 

 rather great numbers, sometimes in company with other Laminariacece, it constitutes an 

 essential element of the formation of Laminariaceas 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 siicceeded 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. Distrih. 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 Kleen with J. G. 

 Agardh'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, eoramon and plentiful. 



The Murman Sea: the west coast of Novaya Zemlya, local and probably rather scarce. 



Alaria dolichorhachis nob. 



A. stipite bvevi, vix ultra pollicari srepe breviore, terete; rliaehide elongata, in planta senili fere pedali, 

 apieem versus incrassata, supra sporopliylla denuo contracta, in costam abrupte abeuiite, conipressa, in sectione 

 transversali clliptiea, usque ad basim cicatricibus sporophyllorum abjcctorum elevatis, superne iu marginem muri- 

 culatum confluentibus insigni; costa prominnla, in sectione transversali elliptica; laniina angusta, lanceolato-lineari, 

 in costam breviter decurrente, rigidiuscula, undulato-plicata; sporophyllis primariis distantibus, ceteris approxi- 

 matis, in planta adulta nuraerosis, fasciculatis, elongatis, pluripoUicaribus, angustis, lineari-spathulatis, vulgo 

 crispis, undulatis vel spiralitcr contortis; soro sporopliyllorum apieem longe marginemque anguste sterilem relin- 

 qiiente. Tab. 20, 21 et 25, fig. 11—18. 



Syn. Alaria esculenta Harv. Fl. West. Esk. p. 49 (?). 



Descrij)tion. The rhicineft issne pretty regularly and in older individuals form two 

 sometimes three, alternating whorls. Thcir length depends on the solidity of the 

 substratum, the rhizines being shorter as the substratum is more solid. 



K Vet, Akad, H.indl. Band, 20, N:o r>. •"" 



