298 Marine Algce of Berwick-on-Tweed. 



The species is well marked by its erect, stiff, rugose stems, 

 attenuated above, abruptly expanding into the much divided 

 laminae. Occasionally specimens with very compressed stems, 

 which appear to belong to Foslie's var. compressa, are washed 

 ashore at the Coves, and elsewhere along the coast. 



Laminaria digitata (Linn.) Edm. 



Fl. Shetl., p. 54. — Fucus digitatus. Linn., Mant. p. 134, 

 Syst. Nat. Ed. xn., p. 178. 



f. vallida, Foslie. 

 Bidr., p. 27. 



Descr. Laminaria flexicanlis, f. valida, Foslie, I.e. 



Fig. ,, digitata, f. valida, Foslie, Lam. Norw. tab. 3, fig. 1-4. 



Stipe nearly cylindrical, thick below, attenuated above, passing 

 rather abruptly into the lamina which is broad, usually shorter 

 than the stipe, aud split nearly to the base with many narrow 

 digitate segments ; base of the lamina rounded. 



Hab. Berwick Bay, Sharper Head. Not uncommon. 



F. TYPICA, Foslie. 



Lam., Norw. p. 60. 



Descr. Laminaria flexicanlis, a. genuina, Le J"/., exam., p. 57. 



Fig. „ digitata, f. typical Foslie, I.e. t. 4-5, fig. 1. 



Stipe thick and cylindrical below, much flattened above, 

 passing rather abruptly into the bi"oad lamina which is split for 

 about half its length into numerous very narrow segments; base 

 of lamina rounded. 



Hab. Berwick Bay, Bnrnmouth, Holy Island, and elsewhere along the 

 coast. Common. 



F. STENOPHYLLA, UatV . 



Descr. Laminaria digitata, var. stenophylla, Saw., Fhyc. Brit. pi. 338. 



Laminaria stenophylla, J. G. Ag., Lamin. p. 18. 

 Fig. ,, digitata, f. stenophylla, Raw., I.e. ; Foslie, Lam. Nor. 



tab. 3, figs. 5-9. 

 Stipe slightly attenuated below, broader above, nearly cylin- 

 drical or but slightly compressed, passing gradually into the 

 narrow lamina which is usually much longer than the stipe and 

 split nearly to the base into numerous very narrow digitate 

 segments, the base of the lamina wedge-shaped. 



Hab. Not uncommon in exposed places near low-water mark and below. 

 Berwick Bay, Holy Island, and elsewhei'e along the coast. 



