— 145 — 



E. I c el. Gommon. 



N. Icel. Probably common. Asmundarstaöir (St.) ; Eyjafjöröur ; Skaga- 

 fjöröur (Grønlund). 



NW. Icel. Gommon. 



SW. Icel. Hvammsfjöröur, Reykjavik. 



Antithainnion l'lumula (Ellis) Thür., ß boréale Gobi, A. boréale Ström f., 

 Algveg. p. 32. 



It grows in the sublitoral region to a depth of c. 12 fathoms. With 

 tetraspores in June. It occurs both with and without glandular cells. 

 E. Icel. Seyöisfjöröur (G. O.). 



N. Icel. Grjötnes (G. O.) ; Skagafjöröur (Strömfeit). 

 NW. Icel. Dyrafjöröur (G. 0.). 

 SW. Icel. Hvammsfjöröur. 



Antithainnion floccosum (Müll.) Kleen., Strömf., Algveg. p. 32. 



In the litoral zone at low-water-mark and in the sublitoral region to 

 a depth of 5 fathoms. With tetraspores in April— June. Without glan- 

 dular cells. 



E. Icel. Eskifjöröur (Strömfeit). 



S W. Icel. Hvammsfjöröur, Viöey, Reykjavik. 



S. Icel. Eyrarbakki, Vestmannaeyjar. 



Ceramium rubrum (Huds.) Ag., Strömf., Algveg. p. 31. 



It grows in the lower litoral zone and in the sublitoral region to a 

 depth of c. 12 fathoms. Collected with tetraspores in May— Sept. and 

 with cystocarps in June — Sept. 8 — 16 cm. high. 



Following forms of this varying species occur: 



f. decurrens J. Ag. 



f. genuinum Kjellm. 



f. proliféra J. Ag. 



The f. decurrens is the most common. 

 Probably common round Iceland. 



N. Icel. Eyjafjöröur. 



NW. Icel. and SW. Icel. Common. 



S. Icel. Staöur (CO.); Eyrarbakki, Vestmannaeyjar. 



Ceramium acanthonotum Garm., Kjellman, The Algæ of the Arctic 

 Sea p. 171. 



It grows in the litoral zone attached to other Algæ. All the Icelandic 

 specimens belong to the f. typica Kjellm. (I.e.). 1—3 cm. high. 



S W. Icel. Öndveröarnes. 



S. Icel. Melvi'k (CO.); Vestmannaeyjar. 



10* 



