THE MARINE BOTANIST. 117 



what rosy when recent, becoming* purplish in 

 drying." 



P. BrodiceL Grows on rocks and the larger 

 algae near low water-mark. Annual. Summer. 

 Common on tlie rocky shores of Scotland and the 

 south and west of England and Ireland. Channel 

 Islands. A large species of a dark brown colour, 

 and soon decomposing and giving out a disagreeable 

 smell in fresh water. " The inarticulate stem, and 

 long, simple, robust branches, clothed with pencils 

 of delicate filaments, strongly mark the species." 



P, variegata. Grows on mud-covered rocks in 

 bays and estuaries ; also on Zostera, Chorda, &c. 

 Annual. Summer and Autumn. Very local. St. 

 German's River, Beggar's Island, Trevol, Tor- 

 point, and various other places near Plymouth. 

 A beautiful species resembling P. elongella in 

 habit, but easily distinguishable from it by its 

 bright purple colour; hitherto it has only been 

 found in the vicinity of Plymouth, where it was 

 first noticed by the Rev. W. S. Hore. On the 

 shores of France and Spain, in the Adriatic, and 



