156 BRITISH SEA-TVEEDS. {JMelanosimrviecB . 



colour greenisli-olive ; substance rigid. Professor Harvey 

 says^ " There are few more beautiful plants among the fili- 

 form Algae of our coasts, and not many more rare/^ It is 

 a species of the south of Europe, where it is found much 

 larger than in Britain. Miss Turner, however, lias found 

 in Jersey a specimen fully equal in size to those of the south 

 of Europe. (See a fine figure in Phyc. Brit., PI. cxlii.) 



2. Sphacelaria sertularia, Bonnem. 



This, though more diminutive, is even more beautiful 



than the last. It is finely figured in Phyc. Brit., PI. cxliit., 



though Professor Harvey is scarcely disposed to allow that 



it is any more than a deep-water variety of Sphacelarm 



filicina. 



3. Sphacelaria scoparia, Lynrjhje. (Plate lY. fig. 15, 

 in its summer state, natural size ; the figure to the right is 

 a branchlet, magnified.) 



Hab. Submerged rocks, and in tide-pools. 



In its summer state, it is a fine bushy hroovi-Iike plant, 

 as the specific name implies. In its winter state it is so 

 bared of its shaggy branchlets that it might well be taken 

 for another plant. The di0"erence of appearance is well 

 represented in PI. xxxvii. of Phyc. Brit. Dr. Greville finds 

 it in the Frith of Forth. It is not common on the Ayr- 



