288 THE MARINE BOTANIST. 



filamentous, composed internally of colourless in* 

 terlaced fibres, outwardly of minute, club-shaped, 

 deep gTeen filaments. Fructification, ovate vesicles 

 seated on the outer filaments. Perennial. Summer, 

 Grows on rocks in the sea. Frequent. 



0, S, C, Bursa, Grows on rocks in the sea. 

 Very rare. Perennial. Summer. According to 

 Pallasy growing plentifully on the Sussex coast, 

 but has not been obtained of late years from thence, 

 except by Mr. Pyke, collector and vendor of algae 

 specimens at Brighton. Penzance Bay, near Fal- 

 mouth, Mr. W. P. Cocks, rare. Shores of Cornwall. 

 Near Torquay. Belfast. Frond a globular hollow 

 ball, one to eight inches in diameter. Structure the 

 same as that of C. tomentosum. 



C. adhcerens. Grows on rocks, near low-water. 

 Very rare. Annual. Torquay. Falmouth Bay, 

 " sparingly," Miss Warren. Falmouth Harbour, 

 ^^ scarce, " and Penzance Bay, " not uncommon, " 

 Mr. W. P. Cocks. Sennen Cove, Land's End. 

 Gorran Haven, and Gerran's Bay, Cornwall. Rath- 

 lin Island, Antrim. Tory Island. This species 



