MAKINE ALGiE. 



43 



V. Fucus. 

 Eoot scutate. Frond dichotomous. 



1 . Fucus vesiculosus. 



2. „ ceranoides. 



3. „ serratus, 



4. „ nodosus. 



5. Mackaii. 



6. „ canaliculatus. 



VT. HlMAKTHALIA. 



Root scutate. Frond cup-shaped. 

 1 . Himanthalia lorea. 



Order II. SPOEOCHNACE^E. 



Olive-coloured, inarticulate sea- weeds, whose spores 

 are attached to externally-jointed filaments. 



