— 144 — 



Probably common round Iceland. 

 E. lcel. Common. 



N.I cel. Asmundarstaöir (St.); Eyjafjöröur. 

 NW. I cel. and SW. I cel. Common. 

 S. lcel. Eyrarbakki. 



Fam. Ceramiaceæ. 

 Callithainnion Arbuscula (Dillw.) Lyngb., Strömf., Algveg. p. 32. 



It grows in the lower litoral zone attached to stones or other algæ 

 (common on Gigartina), and also occurs on Cladophora rupestris. Col- 

 lected with tetraspores in May — July, with cystocarps and antheridia in 

 June. 3 — 4 cm. high. 



Rather common in SW. lcel. and S. lcel. 



S W. lcel. Öndveröarnes; Njarövi'k (CO.). 



S. lcel. The southern shore of Reykjanes (CO.); Eyrarbakki, Vest- 

 mannaeyjar. 



Callithamnion scopuloruin C. Ag., Spec. Alg. p, 176. 

 In the litoral region, on stones and various algæ as Gigartina, Gysto- 

 clonium, Cladophora rupestris a. o. With tetraspores in May— July. 



S W. lcel. Öndveröarnes, Einarslön; Reykjavik (CO.). 

 S. lcel. Vestmannaeyjar. 



Plumaria elegans (Bonnern.) Schmitz, Syst. Uebersicht der bisher be- 

 kannten Gattungen der Florideen. Flora oder allgem. bot. Zeitung 1889; 

 Kjellman: The Algæ of the Arctic Sea p. 172. 



It grows in the lower litoral zone; with cystocarps in May, tetra- 

 spores in June, August and October. 7 — 10 cm. high. 



Probably common in SW. and S. lcel. 



S W. lcel. Hrappsey, Stykkisholmur ; Reykjavik (CO.). 

 S. lcel. Melvik (CO.); Eyrarbakki, Vestmannaeyjar. 



Ptilota plumosa (L.) Ag., Strömf., Algveg. p. 32. 

 In the sublitoral region in a depth of 1 — 20 (usually 3 — 10) fathoms. 

 With tetraspores in May— Sept. and cystocarps in May— June. 4 — 18 

 (usually 10—18) cm. high. 



N. lcel. Asmundarstaöir (St.); Grimsey (O. D.) ; Eyjafjöröur. 

 NW. lcel. and SW. lcel. Common. 



S. lcel. Probably common. Staöur (C. O.) ; Eyrarbakki, Vestmannaeyjar. 



Ptilota pectinata (Gunn.) Kjellm., Strömf., Algveg. p. 32. 

 In the sublitoral region to a depth of c. 10 fathoms, and in the litoral 

 zone at low- water-mark. 2 — 8 cm. high. 



