THE MARINE BOTANIST. 13 



When young", and growing* in deep water, this 

 species bears luxuriant leaves ; these, Mrs. Griffiths, 

 and other observers, have recorded, eventually 

 elong-ate, and become the branches. Air-vessels 

 small, one or two together, near the tips of the 

 branches. Perennial. Summer. Grows on rocks 

 in tide-pools on the south and south-west shores 

 of England. Coast of Sussex. Isle of Wig"ht, 

 and Jersey. Weymouth. Sidmouth. Torquay. 



CYSTOSEIRA FIBROSA. — FIBROUS 

 CYSTOSEIRA. 



Very bushy • branches densely clothed with 

 narrow, flat leaves. Stem generally undivided; 

 frond three feet in length or upwards ; the terminal 

 ramuli are long, and bristle -like. Air-vessels 

 mostly solitary, situated in the branches, and 

 remote from the tips, larger than in other British 

 species of Cystoseira. Colour dark olive-green. 

 Perennial. Summer. Grows on rocks near low 



