H. JONSSON 



bjarg are referred to NW. Icel., in the paper mentioned above, but 

 in the present work (cf. Jonsson, 33, p. 11) to North Iceland. These 

 localities are: Hrutafjor5ur, Prestsbakki, Kolbeinsa, Skalholtsvik, 

 KollafjarSarnes, Broddanes and Grimsey in Hunafloi. 



RHODOPHYCE^. 



BANGIOIDE^E. 



Fam. Bangiaceae. 



Bangia fuscopurpupea (Dillw.) Lyngb., K. Rosenv., 61, p. 831. 

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



Porphyra umbilicalis (L.) J. Ag., K. Rosenv., 61, p. 830; P. laciniata 

 Stromf., 70, p. 34. 



Common in all parts of the coast of Iceland. 



Porphyra miniata (Ag.) Ag., K. Rosenv., 61, p. 826; Diploderma m., 

 D. tenuissimum, D. amplissimum Stromf., 70, p. 33. 

 Found in all parts of the coast. 



Porphyropsis coccinea (J. Ag.) K. Rosenv., 65, p. 69; Porphyra 

 coccinea Jonsson, 31. 

 SW. Icel.: Reykjavik, S. Icel. 



Conchocelis rosea Batters. 

 Found in all parts of the coast. 



FLORIDE.E. 



Fam. Helminthocladiaceae. 



Chantransia virgatula (Harv.) Thur., K. Rosenv., 61, p. 824. 

 NW. Icel., SW. Icel. 



Chantransia secundata (Lyngb.) Thur., K. Rosenv., 61, p. 824. 

 Found in all parts of the coast. 



Chantransia Alariae H. Jonsson, 31. 

 SW. Icel., S. Icel. : Eyrarbakki. 



Chantransia microscopica (Naeg.) Fosl. On Cladophora gracilis in 

 the littoral zone. Thallus has long' hairs. Published in Borgesen 

 and Jonsson, 14. 



N. Icel.: Kolbeinsa. 



The specimens mentioned under this name belong most probably 

 to another species of Chantransia with a unicellular base. 



