— 154 — 



NW. I c el. Isafjöröur; Dyrafjöröur (Ldbk., CO.); Talknafjöröur (Ldbk.). 



SW. Ic el. Reykjavik. 



S. I c el. Eyrarbakki (Strömf.). 



Lithothamnion Lenormandi (Aresch.) Fosl., The Norwegian Forms of 

 Litliothamnion 1895, p. 150. 



In a depth of 1—2 fathoms. 

 SW. 1 c e 1. Reykjavik. 



Phymatolithon polymorphum (L ) Fosl., List of Species of the Litho- 

 thamnia p. 8; Lithothamnion polymorphum Strömf., Algveg. p. 19. 

 In the litoral region at low-water-mark. 

 S.I c el. Eyrarbakki, Vestmannaeyjar. 



Clathroinorphum compart inn (Kjellm.) Foslie, List of Species of the 

 Lithothamnia p. 8 : Lithothamnion compactum Kjellm., The Algæ of the 

 Arctic Sea p. 101. 



In a depth of 1 — 18 fathoms. 



E.I cel. Reyöarfjöröur, Seyöisfjöröur. 

 N. Icel. Grjötnes (CO.); Eyjafjöröur. 

 NW. I cel. Hrütafjöröur. Isafjöröur. 

 SW. Icel. Reykjavik (CO). 

 S. Icel. Eyrarbakki. 



Clathroinorphum circumscriptum (Strömf.) Fosl, List of Species of 

 Lithothamnia p. 8; Lithothamnion circumscriptum Strömf., Algveg. p. 20. 



In the lower litoral zone and upper sublitoral region to a depth of 

 c. 5 fathoms, on stones and the fibers of Laminaria. 



E. Icel. common. Berufjöröur, Reyöarfjöröur, Seyöisfjöröur. 

 N. Icel. Eyjafjöröur (O. D,, St.); Hraun i Fljöt (G. Davfösson). 

 NW. Icel. Isafjöröur; Talknafjöröur (Ldbk.); Arnarfjöröur. 

 S W. Icel. Melar, Reykjavik. 



Lithophyllum < rouani Fosl., List of Species of the Lithothamnia, p. 10. 



Only known from two places in a depth of 5 — 7 fathoms on Lami- 

 naria hyperborea, both on the stem, which was nearly totally covered 

 by it (at Hrisey), and on the fibers. 



N. Icel. Hrisey. 



NW. Icel. Dyrafjöröur (CO.). 



Der mat oli I lion inacrocarpum (Ros.) Fosl., Revised systematical survey 

 of the Melobesieæ p. 21 ; Melobesia macrocarpa Strömf., Algveg. 



On the libers and stems of Laminaria hyperborea. With tetraspores 

 and cystocarps in April — June. 



