The Marine Algæ of Iceland. 



(III. Chlorophyceæ. IV. Cyanophyceæ.) 



By 



Helgi Jonsson. 



III. Chlorophyceæ. 



Fam. Protococcaceæ. 



Chlorochytrium Cohnii Wright, Rosenv. Grl. Havalg. p. 963. I have 

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

 sheaths of diatoms. Collected with zoospores in July. 



SW. Icel. Ondveröarnes, Einarslön. 



Chlorochytrium inclusum Kjellm. Arct. Alg. p. 320, Tab. 31, tig. 8—17; 

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



The Icelandic specimens of this species are up to 100 fi 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 Brodiæi var. interrupta, Turnerella Pennyi 

 and Halosaccion ramentaceum. The chromatophore is a large parietal 

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

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

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

 spores in July. 



E. Icel. Seyöisfjöröur, Hüsavfk. 

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

 NW. Icel. Kolbeinsâ; Arnarfjöröur (Ldbk.). 

 SW. Icel. Reykjavik (B. Sæmundsson). 



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

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



