MARINE ALGAL VEGETATION 13 



Ralfsia verrucosa (Aresch.) J. Ag., Reinke (59), Atlas T. 5 and 6, 

 figs. 113. 



E. Icel, N. Icel.. S\Y. Icel. 



Ralfsia deusta (Ag.) J. Ag., K. Rosenv., 61, p. 898. 



E. Icel., N. Icel., SW. Icel., S. Icel. 



Myrionema vulgare Thuret, Sauvageau, 66, p. 185. 



N. Icel., SW. Icel. 



Myrionema Corunna3 Sauvag., 66, p. 237. 



S. Icel. 



Myrionema globosum (Rke) Fosl., New or critical Norw. Algae, p. 

 17; Ascocyclus globosus Rke, 58, p. 46; Atlas (59) T. 17; Phycocelis 

 globosus K. Rosenv., 62, p. 86, figs. 1920. 



E. Icel., N. Icel., NW. Icel., SW. Icel. 



Myrionema fasroense Borgs., 13, p. 424. 



SW. Icel. 



Myrionema Laminar! (K. Rosenv.), Dermatocelis LaminariaB K. 

 Rosenv., 62, p. 89, fig. 21. 



SW Icel. 



Ascocyclus islandicus H. Jonsson, 31, p. 149. 



N. Icel. 



Probably this species will prove to be identical with A. sphcerop horns 

 Sauv., cf. Jonsson, 31, p. 151 and Kylin. 1 The last-named author 

 writes that A. islandicus without doubt is identical with A. sphcerop ho rus, 

 but he gives no particulars as to the chromatophores of the last-named 

 species, I therefore must still regard the Icelandic plant as a distinct 

 species. 



Fam. Ectocarpaceae. 



Microsyphar Polysiphonia3 Kuck., Beitrage (48) p. 29. 



NW. Icel., SW. Icel. 



Streblonema acidioides K. Rosenv., 61, p. 894; 62, p. 80; Phyco- 

 celis secidioides Kuck., Bemerk. I (57), p. 234. 



E. Icel., N. Icel., SW. Icel. 



Streblonema StilophoraB Cr. var. ccespitosa K. Rosenv., 61, p. 892. 



Found in all parts of the coast. 



Pylaiella littoralis (L.) Kjellm.; Ectocarpus littoralis, Kuck., 48, 

 p. 7; Rosenv., 61, p. 881 ; Pylaiella littoralis, Pylaiella varia Kjellm., 

 35, p. 83. 



Common around the coast of Iceland. 



1 Harald Kylin, Zur Kenntnis der Algenflora der Norwegischen Westkiiste, 

 Arkiv for Botanik. Bd. 10, No. 1, 1910. 



