376 



Fig. IS. Cladophora gracilis Kiitz. 



The uppermost part of the main branches showing the branching of the apex 



(compare the text). (15:1.) 



their breadth. The rhizoids (fig. 19) resemble for the most part those 1 

 have described in C. sericea f. (p. 374). 



E. I eel. DjiipivogLir. 

 NW. I eel. Kolbeinsa. 

 SW. Icel. Brokey. 



a 



Fig. 19. Cladophora gracilis Kiitz. 



a shows well developed and branched rhizoids (46:1) and h (35:1) yet mibranched 



rhizoids (compare the text and C. sericea f. p. 374). 



