22- 



The cells are rather narrowed at the ends and are thickest 

 a little below the uppermost end (Fig. 11). In the main branches 



the cells are about 

 12b fj. thick, in the 

 thickest part even 

 up to 150 /i and 

 the length up to 

 lOdiam. In the up- 

 permost branches 

 the cells are only 

 about 70 o. thick 



and the length 

 reaches about 6 

 diam. The cells 

 especially in the 

 main branches are 

 often somewhat 

 curved and here- 

 with give the 

 whole branch a 



sinuous appear- 

 stratified, and the 



Fig. 11. Cladophora corallicola no v. spec. 

 Habit of a branch. (About 10:1). 



and 



ance. The cell wall is rather thick 

 plant upon the whole rather stifT. 



The rhizoids have no walls at their base and are about 45// thick 



Below the main branches are 

 often rather much branched, di- 

 trichotomously, higher up the fila- 

 ments get here and there a short 

 branch or most often none at all. 



Found twice in the open sea at a 

 depth of about 30 meters off America 

 Hill, St. Jan. 



3. Cladophora fuliginosa Kiitz. 



KuTzi.NG, Species Algarum, 1849, 

 p. 415. Collins, The GreenAlgse of North 

 America, p. 348. 



Blodgettia confervoides Harvey, 

 Nereis Bor.-Am., p. 48, pi. XLV, C. 



Referring to the remarks by Collins 1. c. I shall only point 

 out here that all the specimens found were infested by Blod- 

 gettia Borneti Wright. The specimens form dark brownish-green 



Fig. 12. Cladophora corallicola 



nov. spec. 



Basal part of filaments with 



rhizoids. (About 12:1). 



