— 155 — 



inflatus in the litoral region. Gathered with plurilocular sporangia in May 

 —July and with unilocular sporangia in April. 



SW. I c el. Brimnes in Snæfellsnes, Viöey. 



S. I cel. Eyrarbakki, Vestmannaeyjar. 



Ectocarpus confervoides (Roth) Le Jol., Kuck. Ectoc. p. 19, Kjellman 

 Handbok p. 77 p. pte. ; Rosenv. Grl. HavaJg. p. 883 p. pte. 



It occurs on Fucaceæ and Rhodymenia palmata in the litoral region, 

 and on species of Larainaria and Saccorhiza dermatodea in the sublitoral 

 region down to a depth of 5 fathoms. Gathered with plurilocular and 

 unilocular sporangia in April — September. 



Fig. 14. Ectocarpus confervoides (Roth) Le Jol. f. pygmœa (Aresch.) Kjellm. 

 a (215 : 1), b (316 : 1), c (316 : 1) portions of the middle part of the erect filaments 

 showing the unilocular sporangia; d (316: 1) a young erect filament with 

 a terminal, unilocular sporangium. 



f. typica is the most common, 

 f. pygmœa (Aresch.) Kjellm. 1. c. 



At Viöey in SW. Iceland I found in a depth of 1 fathom a small 

 Ectocarpus on Laminaria, covering the lamina with a dense and low matted 

 growth. It consists of horizontally creeping filaments from which the erect 

 filaments arise. The erect filaments are usually unbranched, but few and 

 short, lateral branches are not rarely found in the upper part of the 

 filaments. The filaments are always thickest in the middle (9 — 36 p), 



