12 H. JONSSON 



Lithothamnion laeve (Stromf.) Foslie, List of species of the Litho- 

 thamnia p. 7; Lithophyllum laeve Stromf., 70, p. 21. 

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



Lithothamnion Lenormandi (Aresch.) Foslie, The Norwegian forms 

 of Lithothamnion, 1895, p. 150. 

 SW. Icel. 



Phymatolithon polymorphum (L.) Foslie, List of species of the 

 Lithothamnia p. 8; Lithothamnion polymorphum Stromf., 70, p. 19. 

 S. Icel. 



Clathromorphum compactum (Kjellm.) Foslie, Lithothamnion com- 

 pactum Kjellm., 36, p. 101 ; Clathromorphum circumscriptum (Stromf.) 

 Fosl., Lithothamnion circumscriptum Stromf., 70, p. 20. 



In all parts of the coast. 



Lithophyllum Crouani Fosl., List of species of the Lithothamnia, 

 p. 10. 



N. Icel., NW. Icel., S. Icel. : Eyrarbakki. 



Dermatolithon macrocarpum (Ros.) Fosl., Revised systematical survey 

 of the Melobesiese, p. 21; Melobesia macrocarpa Stromf., 70, p. 23. 

 SW. Icel., S. Icel. 



Corallina officinalis L., Stromf., 70, p. 18. 

 N. Icel., NW. Icel., SW. Icel., S. Icel. 



Hildenbrandia rosea Kiitz, Stromf., 70, p. 24. 

 Common around the coast of Iceland. 



Fam. Myrionemaceae. 



Lithoderma fatiscens Aresch., emend. Kuck., Bemerk. I (47), p. 238. 

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



Petroderma maculiforme (Wollny) Kuck., Bemerk. II (47), p. 382. 

 N. Icel. 



Ralfsia ovata K. Rosenv., 61, p. 900; 62, p. 94. 



N. Icel. : Husavik (Ove Paulsen), Prestsbakki; SW. Icel. 



Ralfsia clavata (Carm.) Farl., Mar. Alg., p. 88; Reinke (59) Atlas 

 T. 5 and 6, figs. 14 20; Stragularia adhserens Stromf., 70, p. 49, T. 

 II, figs. 1315. 



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



