10 



pacta Fijellm. and f. laxa Kjellm. Their length varies from 2 — 

 12 cm. Young shoots луеге abundant in July and September. 



ß. tenuissima (Rupr.) Kjellm. 



The specimens attain a length of 7 cm., are abundant in 

 hair leaves ; the youngest branches often corymbous. Gathered 

 in June in the littoral region and in a depth of more than 2 

 fathoms, 



a. typica. 



Gr. or.: Tasiusak (Amaga), Stenö, Nualik. 



/9. tenuissima. 



G г. о г. : Moræneo. 



Polysiphonia Grev. 



20. P. arctica J. Ag., K. Rosenv. Grl. Havalg. p. 800, Deux. 

 Mém. p. 25. 



The species was gathered sterile in May — September. The 

 length varies from 7 — 20 cm. The pericentral cells are generally 

 5 — 7, and but rarely 4, as mentioned by Rosen vinge. The 

 specimens from Кар Rorlase Warren were supphed with mono- 

 siphone haptera irregularly placed in the lower part of the frond. 

 These haptera were most often discoidally widened at the end; 

 they are perfectly like those mentioned by Rosenvinge in 

 Deux. Mém. 1. с. In May— August the species Avas richly sup- 

 plied with new shoots. The older parts of the frond are 

 generally much overgrown with Diatoms. It was gathered in a 

 depth of 3 — 20 ( — 30) fathoms both on open and sheltered 

 shores. 



Gr. or.: Tasiusak, Ikerasak, Smalsund, Stenö, Ödesund, Kan- 

 gerdlugsuatsiak, Nualik, Turner Sund, Кар Borlase Warren, Sabine Ö. 



Fam. Delesseriaceœ. 

 Delesseria Lam. 



21. D. Baerii (Post, et Rupr.) Rupr., emend., K. Rosenv. Grl. 

 Havalg. p. 806. Deux. Mém. p. 26. 



