The Marine Alo'ae of Iceland. 



o 



(III. Chlorophyceae. IV. Cyanophycese.) 



By 

 Helgi Jonsson. 



III. Chlorophyceae. 



Fani. ProtoGOccaceae. 



Chlorochj'trium Cohnii Wright, Rosenv. Gil. Havalg. p. 963. I have 

 met with this species in the literal region, growing in the gelatinous 

 sheaths of diatoms. Collected with zoospores in July. 



SW. Icel. OndverOarnes, Einarslon. 



Chloi'ochj trill III indiisiim Kjellm. Arct. Alg. p. 320, Tab. 31, fig. 8—17; 

 Rosenv. Grl. Havalg. p. 963, Deux. Mem. p. 119. 



The Icelandic specimens of this species are up to lOO/i in diameter 

 and agree well with the description and figures given by Kjellman (1. c). 

 It has been found down to a depth of 12(— 18) fathoms, growing in 

 Rhodymenia palmata, Phyllophora Brodisei var. interrupta, Tm-nerella Pennyi 

 and Halosaccion ramentaceum. The chromatophore is a large parietal 

 plate, irregularly perforated, as pointed out by Rosenvinge (Deux. Mem. 

 1. c.) and resembles the chromatophore of Chlorocytrium dermatocolax as 

 figured by Svedelius (Ostersjcins Alg. p. 72, fig. 1 a). Collected with zoo- 

 spores in July. 



E. Icel. SeyOisfjorOur, Hi'isavik. 



N. Icel. Grjotnes (CO.); EyjafjorOur. 



NW. Icel. Kolbeinsa; ArnarfjorOur (Ldbk.). 



SW. Icel. Reykjavik (B. Ssemundsson). 



Chlorochjtriuiii dermatocolax Rke. Algenflora p. 88; Rosenv. Grl. 

 Havalg. p. 964; Sved. Ostersjcins Alg. p. 72. 



