Contribution. I. 97 



Syn. Chorda lomentaria Aresch. Phyc. Scand. p. 365. 

 Fucus lomentarius Sommerf. Suppl. p. 184. ') 



The form fistulosa seems to me to be a pretty well mar- 

 ked one. It is smaller than the typical form, and disting- 

 uishes itself, besides not being constricted, by the form of the 

 paraphyses. These are most often rather numerous and ge- 

 nerally clavate or subclavate, with a much attenuated base. 

 The hairs are few or often wanting. 



The species in question is litoral, chiefly occurring at 

 low- water mark, and here it often grows gregarious in a 

 great number of individuals. It thrives best on open coasts, is 

 here vigorously developed, attaining a length of 1 m. and more, 

 but occurs also in sheltered places. The form fistulosa lives in 

 the same localities as f. typica, though occosionally in rock- 

 pools and higher up than the latter. Specimens bearing ga- 

 metangia have been collected in the later half of June, in 

 July and in the beginning of August. 



Distribution: Common along the whole coast and at se- 

 veral places abundant, as Kjollefjord, Mehavn, Finkongkjei- 

 len, Syltefjord. 



Gen. Physematoplea Kjellm. mscr. 



Physematoplea attenuata Kjellm. 



N. Ish. Algfl. p. 321. 

 Descr. Scytosiphon attenuatus Kjellm. 1. c. 

 Fig. „ „ „ „ t. 26, fig. 1—5. 



This alga is litoral, growing in rock-pools on exposed 

 places. It is here smaller and thinner than at the coasts of 

 Spitzbergen, 3 — 7 cm. long. It bears zoosporangia in the 

 middle of July. At West-Finmarken it has been taken with 



'. It has been shown that Chordaria attenuata F o s 1. in Tromso Mus. 

 Aarsh. X, p. 176 is a Scytosiphon, but I do not know, yet, whether 

 referrible to S. lomentarius. 



