9$ M. Fostie. 



liriant developed on open coasts, or else in exposed localities, 

 but growing in sheltered places, or entering into deep bays, 

 it becomes more and more narrow. At Finmarken as well 

 as farther south I along open coast only have met with but 

 the broad form (Ph. ceespitosa), and, on the other hand, only 

 the narrow one in the inner pait of deep bays. Here the 

 latter is most often 1.5 — 4 mm. broad and generally more 

 or less twisted, but sometimes growing even in these places 

 gregarious in a large number of individuals. 



The species is litoral, chiefly occurring in pools between 

 tides, usually fastened to smaller stones, more seldom to rocks 

 and exceptionally to other algse, as Halosaccion ramentaceum 

 and Fuci. It is smaller at East- than at "West-Finmarken, 

 generally about 10 cm. long, seldom attaining a length of 

 25 — 30 cm. It bears reproductive organs in August, in 

 Tromso amt in the later half of July. 



Distribution: Common and pretty plentiful almost every- 

 where. 



Gen. Scytosiphon (Ag.) Thur. 

 in Le Jol. Liste Alg. Cherb. p. 20; Ag. Spec. Alg. 1, p. 160; char, mut 



Scytosiphon lomentarius (Lyngb.) J. G. Ag. 

 Spec. Alg. 1, p. 126; Chorda lomentaria Lyngb. Hydr. Dan. p. 74. 



f. typica. 

 Descr. Scytosiphon lomentarius J. G. Ag. 1. c. 

 Fig. Chorda lomentaria Harv. Phyc. Brit. t. 285. 



Scytosiphon lomentarius Aresch. Obs. Phyc. 3, t. 2, fig. 1. 

 Exsicc. Chorda lomentaria Aresch. Alg. Scand. exsicc. No. 94. 



f. fistulosa (Ag.) 



Chorda filum /S fistulosa Ag. Syn. p. 14. 

 Descr. Chorda filum d fistulosa Kiitz. Spec. Alg. p. 548. 

 Fig. , „ „ „ „ Tab. Phyc. 8, 1. 14 et 15, fig. d— e. 



Exsicc. „ lomentaria var. autumnalis Aresch. Alg. Scand. exsicc. No. 95. 

 . „ b. Aresch. 1. c. No. 169. 



