10 



pacta Kjellm. and f. Jaxa Kjellm. Their length varies from 2 — 

 12 cm. Young shoots were 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. ti/pica. 



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



ß. temàssima. 



G r. o r. : Moræneo. 



Polysiplioiiia Grev. 



20. P. arctica J. Ag., K. Rosenv. GrI. Havalg. p. 800, Deu.x. 

 iMém. 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 Kap Borlase Warren were supplied 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 Rosen vinge in 

 Deux. Mém. I. c. In May — August the species was 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, Smalsuud, Stenö, Ödesund, Kan- 

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



Fam. DelesseriacecB. 

 Delessen* a Lam. 



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

 Havalg. p. 806. Deux. Mém. p. 26. 



