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ALPHABETICAL INDEX OF THE 



Polysiphonia nigrescens. Autumn and spring. Mount 

 Edgecumbe ; Torpoint ; Sidmouth ; Exmouth ; 

 Torquay. 



Polysiphonia obscura. Summer. On marine rocks, at 

 half- tide level. Sidmouth and Jersey. 



Polysiphonia parasitica. Summer and autumn. Fire- 

 stone Bay ; under the Hoe ; Plymouth ; Torquay. 

 Arran. 



Polysiphonia pulvinata. Summer. Ilfracombe ; Tor- 

 bay ; Whitsand Bay ; Salcombe ; Saltcoats. 



Polysiphonia Richardsoni. Summer. Dumfries. 



Polysiphonia simulans. Summer. Whitsand Bay ; 

 Bovisand ; Torquay. Orkney. Jersey. 



Polysiphonia spinulosa. Summer. Whitsand Bay. 

 Appin. 



Polysiphonia stricta. Summer. In the sea, on sand- 

 covered rocks. 



Polysiphonia subulifera. Summer. Torquay ; Wey- 

 mouth. Belfast Bay. 



Polysiphonia urceolata. Spring and summer. Abun- 

 dant. 



Polysiphonia variegata. Summer and autumn. Ply- 

 mouth Harbour ; Beggar's Island ; Mount Edge- 

 cumbe. 



Polysiphonia violacea. Summer. Mount Edgecumbe ; 

 Torquay. 



