110 SEA-WEED PICTURES. 



some of the principles on which the classification of 

 these plants is based, and described some of the com- 

 moner species of our shores. For a more detailed his- 

 tory of the family, I must refer my readers to books 

 more expressly written on the subject.* 



* See the Author's " Phycologia Britannica," containing coloured 

 plates and detailed descriptions of all the British Sea-weeds ; also, 

 his " Manual of the British Marine Algae," 2nd edit, with 27 plates 

 of genera. 



