12 THE MARINE BOTANIST. 



racter sufficiently distinguishes it from all the 

 other British species. Cystoseira barbata^ a native 

 of the Mediterranean^ which has also knobs on 

 the stem, is reported to have been gathered on 

 the coast of Devon by Hudson^ but it has never 

 been noticed on that coast since^ and probably 

 is little entitled to be ranked as a British species. 

 The air-vessels in Cystoseira granulata are placed 

 two or three tog-ether in the upper branches. 

 Colour a nearly transparent olive-green. Peren- 

 nial. Summer. Grows in rocky pools left by the 

 tide on the coasts of England and Ireland; not 

 uncommon. Aberfraw. Anglesea. Jersey. 



CYSTOSEIRA FCENICULACEA.— FENNEL- 

 LIKE CYSTOSEIRA. 



Stem from four to six inches^ bearing many long 

 and nearly simple branches, mostly naked toward 

 the base, but thickly set in the upper part with 

 alternately pinnate, or partially forked branchlets. 



