108 ALPHABETICAL INDEX OF THE 



Laurencia obtusa. Summer. Whitsand Bay ; Red- 

 ding Point. Androssan ; Arran. 



Laurencia pinnatifida. Spring and summer. Mount 

 Edgecumbe ; Bovisand ; Torquay ; Sidmouth ; Ex- 

 mouth. 



Laurencia tenuissima. Summer. Bovisand ; Torquay ; 

 Weymouth ; Isle of Wight. Ballycotton. 



Leathesia Berkeleyi. Summer. On submarine rocks 

 between tide-marks. 



Leathesia tuberiformis. Summer and autumn. Bo- 

 visand ; Mount Batten ; Torquay ; Exmouth. 



Lithocystis Allmanni, Summer. Parasitical on Chry- 

 simenia cla\ellosa. Malahide. 



Litosiphon Laminarise. Summer. Parasitical on Alaria 

 esculenta. 



Litosiphon pusillus. Summer. Parasitical on Chorda 



Filum. Very abundant. 

 Lyngbya Carmichaelii. Summer. On marine Fuci. 



Plymouth ; Torbay ; Cornwall. Appin. 

 Lyngbya Cutlerise. Spring and summer. Near the 



mouth of the Otter ; B udleigh Salterton. 

 Lyngbya ferruginea. Summer. In mud-bottomed 



pools of brackish water. Appin. 

 Lyngbya flacca. Summer. Parasitical on various 



Algae ; on the Fuci. 

 Lyngbya majuscula. Summer and autumn. Mount 



