- 172 — 



longest specimens, I have met with, are 330 cm. long. It had uniloculat 

 sporangia in June— July. 



E. I eel. Vattarnes, Brimnes, Borgarnes. 

 N. Icel. Gri'msey (0. D.); EyjafjorOur. 

 SW. Icel. Gustsey, Stykkisholmur. 



Chorda ('Hum (L.) Stackhouse, Rosenv. Grl. Havalg. p. 853; Stromf. 

 Algveg. p. 47. 



It occurs in the lower litoral region and the upper sublitoral region 

 down to a depth of 10 fathoms. The largest specimen, I have collected, 

 is 220 cm. long. Fructiferous specimens were gathered in July — October. 



E. Icel. BerufjorQur. 



N. Icel. EyjafjorQur ; Sigri3arsta5a6s (St.). 



NW. Icel. kolbeinsa, Broddanes; Isafjor3ur(C.O.), DyrafjorOur(C.O.). 



SW. Icel. common. 



Fam. Laminariaceae. 



Saccorhiza derniatodea (DelaPyi?) J. Ag. ; Rosenv. Grl. Havalg. p. 850; 

 Phyllaria lorea Slromf. Algveg. p, 42. 



Regarding the size, consistence and division of the frond and the 

 number of the cryptostomata this species is much varying. The lamina 

 is usually undivided, but in exposed places it is divided into few and 

 broad segments. It occurs in pools in the lower litoral region, at low- 

 water mark and in the sublitoral region down to a depth of c. 15 fathoms. 

 Often it grows gregariously in litoral pools and in the Laminaria-zone. 

 The largest specimens, I have met with, had a 26 cm. long stipe, 113 cm. 

 long and 15 cm. broad lamina. Specimens gathered in May— June were 

 sterile, but fructiferous specimens were met with in July, August and 

 October. 



E. Icel., N. Icel. and NW. Icel. common. 

 SW. Icel. Stykkisholmur; Reykjavik (G. 0.!). 



Laniinaria saecharina (L.) Lam., Kjellm. Arct. Alg. p. 229, Handbok 

 p. 24 ; Stromf. Algveg. p. 42. 



It grows everywhere along the coasts of Iceland and, in company 

 with Laniinaria hyperborea, Larainaria digitata and the Alaria-species, it 

 forms the Laminaria-zone, which everywhere on the rocky coasts are 

 expanded from low-water mark down to a depth of 15 fathoms. It also 

 occurs in rock-pools in the lowest part of the litoral zone. 



The length of the stipe, the shape, size and consistence of the lamina 

 is much varying in this species. These variations, I think, depend partly 



