LIST OF THE BEITISH 



I. Sargassum. 

 Branches bearing ribbed leaves. 



1. Sargassum vulgare. 



2. ,, bacciferum. 



II. Halidrys. 

 Frond linear, pinnate, leafless. 



1. Halidrys siliquosa. 



III. Cystoseira. 



Root scutate. Frond much branched, bushy. 



1. Cystoseira ericoides. 



2. „ granulata. 



3. ,, barbata. 



4. fceniculacea. 



5. „ fibrosa. 



IV. Pvcnophycus. 

 Root branching. Frond cylindrical. 



1. Pycnophycus tuberculatus. 



