BRITISH MARINE ALGJE. 



117 



Eivularia plicata. Summer. On the rocky sea-shore, 



above high- water mark. Torquay. Ayremouth. 

 Rytiphlaea complanata. Summer. Under the Hoe ; 



Plymouth. West of Ireland. 

 Rytiphlasa fruticulosa. Summer and autumn. Bovi- 



sand ; Whitsand Bay ; Torquay ; Exmouth ; &c. 

 Bytiphlsea pinastroides. Winter. On submarine rocks 



near low- water mark. 

 Bytiphlaea thuyoides. Autumn. Whitsand Bay ; Bo- 



visand ; Torquay ; Sidmouth. 



Sargassum bacciferum. Occasionally cast on shore. 

 Orkneys. (Gulf-weed). 



Sargassum vulgare. With the preceding. 



Schizosiphon Warreniae. Summer. On rocks at high- 

 water mark. Plymouth ; Sidmouth ; Falmouth. 



Schizothrix Creswellii. Winter. On rocks near high- 

 water mark. Sidmouth. 



Seirospora Griffithsiana. Summer. Mount Edge- 

 cumbe ; Firestone Bay ; Plymouth ; Torquay ; 

 Salcombe. 



Spermoseira Harveyana. Summer. In muddy ditches. 



Shirehampton, near Bristol. 

 Spermoseira littorea. Summer. In muddy, brackish 



ditches. Barmouth ; Dolgelly. 

 Sphacelaria cirrhosa. Autumn. On Desmarestia acu~ 



leata and other Algae. 



