25 



but only small specimens, 3 feet long — at Ikerasak mingled 

 with a luxuriant vegetation of Latninaria, in a very rapid cur- 

 rent, sheltered by a sea cliff, where no drift ice would normally 

 appear. According to C. Kruuse's statement the species is 

 common. 



Gr. or.: Kap Dan, Tasiusak, Ikerasak. 



Laminaria Lam. 



43. L. digitata (L.) Lam., K. Rosenv. Deu.\. Mém. p. 51. 



44. L. nigripes J. Ag., emend. K. Rosenv. Grl. Havalg. p. 842. 

 ß atrofulva (J. Ag.) K. Rosenv. I. c. 



Of this variety a few smaller specimens have been gathered 

 wilh the lamina undivided or divided in two parts, besides one 

 large specimen with much longer stipe than stated by Rosen - 

 vinge. The slipe is terete; only at the upper end, where it 

 merges into the lamina, it is a little broader and somewhat 

 compressed, 40 cm. long. The lamina is 115 cm. long, divided 

 in two lobes , almost equally broad — the greatest breadth 

 43 cm.; only the inferior portion of the lamina, 13 cm. long, is 

 undivided. The plant is changing the lamina, and the remainder 

 of the old lamina is 60 cm. long. A circle of dense, radially 

 elongated, muciparous canals fully agreeing with Rosenvinge 's 

 description is found in the stipe, most often very near the sur- 

 face, so as to be frequently covered of but a single layer of 

 cells. The large specimen belongs to f. cucullata, it grew in 

 Ikerasak, on a steep rocky wall, sheltered by a sea cliff, and 

 mingled with a luxuriant vegetation of Laminaria, in a very rapid 

 current, where no drift ice would normally appear. In a depth 

 of 3 — 5 fathoms. Gathered in June, changing the lamina. 



Gr. or.: Ikerasak, Nualik. 



45. L. lougicruris DelaPyl., K. Rosenv. Grl. Havalg. p. 845, 

 Deux. Mém. p. 52. 



This species is formerly known from a single place, Ang- 



