Contribution. I. 65 



Descr. Fucus serratus f. angusta Kjellm. 1. c. 



Syn. Fucus serratus Gunn. Fl. Norv. 1, p. 28. 

 „ Wg. Fl. Lapp. p. 489. 

 „ „ Sommerf. in Acta Nidros. p. 50. 



Besides the above quoted form, I suppose that also 

 other forms of this species are to be found on the coast of 

 East-Finmarken. 1 The plant often bears air-bladders in the 

 upper part of the thallom (f. typica and f. vadorum). They 

 are of indefinite shape, mostly much more long than broad, 

 0.5 — 7 cm. in length. 



The species is litoral, occupying a rather broad border 

 in the lower part of the zone, or sublitoral, descending a 

 few feet below low-water mark (espicially f. grandifrons). 

 It appears in much exposed as well as in sheltered places, 

 but, as far as I know, it does not penetrate to the inner 

 end of the greater bays. 



Distribution: Common and in great abundance every- 

 where except in the inner part of the deep fjords. 



Fucus vesiculosus L. 



Spec. Plant. 2, p. 1158. 



f. vadorum Aresch. 

 Fuc. et Pycnoph. p. 102. 

 Descr. Fucus vesiculosus /? vadorum Aresch. 1. c. 



B „ f. vadorum Kleen, Nordl. Alg. p. 26. 



f. typica. 

 Descr. Fucus vesiculosus a rupincola Aresch. 1. c. 



„ n sens, strict. Kleen, 1. c. 



Fig. „ „ Harv. Phyc. Brit. t. 204. 



Exsicc. „ „ Aresch. Alg. Scand. exsicc. No. 53. 



f. anyustifrons Gobi. 



Algenfl. Weiss. Meer. p. 53. 



*. As 1 have lost the greatest part of my collections of Fucacece and 

 Maria from Finmarken, my remarks on the species and forms and 

 their distribution are founded on the small rest of the collections 

 brought home, and a number of notes. 



