- 138 — 



oblong, triangular form, with a broad, cuneated base. Such specimens 

 Strömfeit has determined as B. pertusa. 

 Undivided specimens also occur. 



Specimens, which have the margin winged with small leaflets (ß. mar- 

 ginifera Harv.) are not rare, but specimens without such small leaflets 

 (a. nuclei Kjellm.) are much more common. 



F. proliféra Kjellm. I.e. (Fig. Turn. Hist. Fuc. T. 115, f. c.) is rather 

 common. 



Loinentaria rlavellosa (Turn.) Gaill. ; Le Jol. Liste des Algues mar. 

 de Gherb. p. 132. 



var. sedifolia Ag. 



On the fibers of Laminaria hyperborea in a depth of 10 — 20 fathoms. 

 S. I c el. Vestmannaeyjar. 



Loinentaria rosea (Harv.) Thür., Le Jol. Liste des Alg. mar. de Gherb. 

 p. 131. Fig. Harv. Phyc. Brit. T. 358 and 301. 



On the fibers of Laminaria hyperborea in company with the last 

 species. 



S. I c el. Vestmannaeyjar. 



Plocauiiuni coccineuin (Huds.) Lyngb., Strömf. Algveg. p. 27. 



In the lower litoral zone. Collected with tetraspores in May-June. 

 4—14 cm. high. 



S. I cel. Staöur (CO.); Eyrarbakki (Strömfeit); Vestmannaeyjar. 



Halosaccion rameuta renin (L.) J. Ag., Kjellm., The Algæ of the Arctic 

 Sea p. 153, Strömf., Algveg. p. 29. 



It grows abundantly in the lower litoral zone, especially in rock-pools. 

 It is a multiform species and is very common round the Icelandic coasts. 

 Collected with tetraspores in March-July and December. With antheridia 

 in April— May. It is 10 — 35 cm. long. Of all the forms the f. robusta 

 is the largest. The most common forms are the following: 



f robusta Kjellm. (Fig. Kjellm. 1. c. T. 12, f. 4, Lepech. Comm. Petrop. 

 19B., T. XXIII). Syn. f. hispida Strömf. I.e. p. 29. 



f. ramosa Kjellm. 



f. densa Kjellm. (Fig. Turn. Hist. Fuc. T. 149). 

 f. subsimplex Rupr. (Fig. Kjellm. I.e. T. 13, f. 3). 

 f. scopula (Strömfeit) (Fig. Strömf. 1. c. T. II, fig. 1). 

 The f. scopula has only been collected by Strömfeit in one place, 

 Eyrarbakki in S. Icel. The f. subsimplex is rather common, the other 



