ALGiE. 



285 



(1.) I have followed the nomenclature of Professor Harvey in his 

 " Manual of the British Marine Algae." Lond. 1849. — At the same 

 time I cannot refrain from acknowledging my early obligations, in the 

 study of this class, to Lightfoot's Flora Scotica, and to the Synopsis 

 of British Fuci by Dawson Turner. The latter is a work of great 

 merit. — For the Fresh-water species, and those which may be pro- 

 perly called the aerial, I have adopted the names of Mr. Hassall in 

 his History of the British Freshwater Algse. Lond. 1845. 



(2.) Of this common species we have three distinct enough varie- 

 ties : viz. a. without vesicles, often prohferous, the pods ovate. = 

 Fucus spiralis. Withering : /3. without vesicles, the frond narrow, the 

 pods linear-elliptic, elongated : y. with vesicles, the pods elliptical. — 

 The F. ceranoides is abundant on the sides of the Tweed, from the 



