THE ALG2E OF GUERNSEY, 375 



It will facilitate future reference if I state here that the 

 number of species enumerated in the subjoined list is as fol- 

 lows : Seaweeds, 236 ; Fresh Water Algge, 43 ; Desmids, 9 ; 

 which with the 322 Diatoms published last year, makes a total 

 altogether of 610 algae recorded for Guernsey in the Trans- 

 actions of this Society. 



In the marine section I have closely followed the order 

 and the names used in Messrs. Holmes and Batters' " Revised 

 List of British Marine Algae," published in December, 1892, 

 inserting in brackets the more familiar names of Harvey's 

 Phycohgia Br (tannic a, whenever necessary. 



SEAWEEDS. 



PleUPOeapsa amethystea, Rosen. Parasitic on Cladophora rupestris. 

 Petit Port. This species has only recently been added to the British 

 flora. 



Oseiilaria eorallinse, Gom. Bordeaux. 



Lyngbya semiplena, J. Ag. (Calothrix cssspitula). Petit Port. Cobo. 



St. Martin's Point. Fermain. 

 L. majUSCllla, Mono. Cobo ; common in some of the pools at high water 



mark. 

 Symploea hydnoides, Kutz. (Calothrix semiplena). Fermain, common 



on corallines near high water mark. Grandes Rocques. Cobo, frequent. 

 Calothrix eonfervieola, C. Ag. Common in autumn on ail parts of the 



coast. 

 C seopulorum, G. Ag. Lihou Island. Cobo. Bec-du-Nez. 



Isaetis plana, Thur. Vazon. 



Rivularia Biasolettiana, Meneg. (Schizosiphon Warrenise). Rock pools 

 at high water mark, Fermain Point. Dripping cliff, Petit Port. 



R. atra, Roth. Common. 



R. nitida, C. Ag. (R. plicata, Ph. Br.) On wet rocks in a cave, Petit Port. 



R. DUllata, Berk. (R. nitida, Ph. Br.) Common all round the coast. 



Anabaena torulosa , Lag. (Sphserozyga Carmichaelii) . Cobo ; frequent 

 in pools at half -tide level. 



Enteromorpha elathrata, /. Ag. Belgrave Bay. Bordeaux. St. Mar- 

 tin's Point. Grandes Rocques. 



E. pereursa, C. Ag. Brackish pool at Pulias. 



E. ramulosa, Sarv. Bordeaux. 



E. eompressa, Grev. Very common. 



E. Linza, /. Ag. (Ulva). Found all round the coast; usually abundant 

 where it occurs. 



E. intestinalis, Link. Common, especially in brackish ditches. 



Ulva latissima, J. Ag. Very common. 



Chsetomorpha tortuosa, Kutz. (Conferva). Petit Port. Bec-du-Nez. 

 La Yallette. 



C. erassa, Kutz. (Conferva linum). Rock pools near Bec-du-Nez. 



C serea, Kutz. Common. 



C baltica, Kutz. Bordeaux. A very recent addition to the British flora. 



Rhizoelonium tortUOSUm, Kutz. (Conferva implexa). Petit Bot. Moulin 

 Huet. 



E 



