åo 



M. Foslie. 



tached to other algæ, as Corallina and tucaceæ. It is best 



r 



developed on open shore, but it is also to be met with on 

 sheltered places or even at the inner end of deep bays (f. 

 sarniensis). The length does not exceed 70 cm. Specimens 

 with young tetrasporangia have been coUected in the middle 

 of July, 



Distribution : Common and plentiful all along the shore 

 and entering the inner end of the greater bays. On several 



> 



localities it appears in great masses so as to determine es- 

 sentially the character of the vegetation. However, thenum- 

 ber of individuals generally seems to be less than at West- 

 Finmarken. 



Fam, Gigartiuaceæ (Kiitz.) J. G. Ag, 



Epicr. p. 173; Kiitz. Phyc. gener, p. 389; char. mut. 



Gen. Cystoclonium Kiitz. 



Pliyc. gener. p. 404. 



Cystoclonium purpurascens (Huds.) Kiitz. 



1. c. Fucus purpurascens Huds. Fl. Angl. p. 589. 

 Descr. Cystoclonium purpurascens J. G. Ag. Epicr. p. 239. 

 lA^. Hypnca purpurascens Harv. Phys. Brit. t. 116. 



Cystoclonium purpurascens Kiitz. Tab. Phyc. 18, t. 15. 



„ „ Arcscli. A]g. Scand. exsicc. No. 76. 



Exsicc, 



Syn. Fucus confervoides Gunn. Fl. Norv. 2, p. 92, 



» 



Wg. Fl. Lapp p. 504. 



H 



elongatus Gunn. 1. c. p. 143. 



Cystoclonium purpurascens Kjellm. Ish. Ålgfl. p. 202. 



A rather yariable alga here as well as more southerly. 

 I cannot find any limit at all between the typical form and 

 the form dcndroidea described by Kjel lm an after speci- 

 mens from West-Finmarken. The plant is, as far as I have 

 seen, always litoral, occurring mostly in rock-pools or on 



