THE MARINE AL(i.E OF GUERNSEY 



the locality given and elsewhere, I was unable to find the fourth — • 

 I*olysiphonia ojjaca. 



II. Systematic List. 



The following list includes all the species hitherto recorded, as well 

 as those of my own gathering. To facilitate quoting localities, the 

 island is divided into six districts, each locality being numbered as 

 shown in the table below. The figures and initials in the square 

 brackets refer to Mr. Marquand's lists : — 



East. 



1. Paradis Hommet. 



2. Bordeaux. 



3. Vale Coast. 



4. Spur Point. 



5. Pike's Corner. 



6. Belgrave Bay. 



7. North Beach. 



8. Castle Cornet. 



9. Bathing-place. 



10. Fermain Bay. 



11. Bec-du-Nez. 



12. St. Martin's Point. 



1. 

 2. 

 3. 

 4. 

 5. 

 6. 

 7. 



South. 



Jerbourg Point. 

 Petit Port. 

 Moulin Huet. 

 Saint's Bay. 

 Petit Bot. 

 Les Tielles. 



North-West. 



L'Eree Bay. 



Vazon. 



Albecq. 



Cobo. 



Grandes Rocques. 



Port Soif. 



Port Grat. 



West. 



1. Pezerie. 



2. Les Portes. 



3. La Varde. 



4. Portelet. 



5. liocquaine Bay. 



6. L'Eree. 



7. Lihou Causeway 



8. Lihou Is. 



North. 



Grande Havre. 

 L'Ancresse. 



South- West. 

 Pleinmont. 



The classification and nomenclature coincide, so far as possible, 

 with Holmes and Batters' Catalogue of 1902. Here and there, as 

 indicated in the notes, the work of more recent algologists has 

 necessitated certain changes — e. y., the older generic name Chan- 

 transia has replaced AchroclicBtium. With regard to the calcareous 

 algse, I have followed Dr. Lemoine's classification as given in Mr. A. 

 D. Cotton's Clare Island Survey (Proc. P. Irish Acad. xxxi. part 15 : 

 1912). 



The following abbreviations have been adopted throughout : — 

 E.=East. S. = South. S.W. = South- West. W. = West. N.W.= 

 North- West. N. = North. M.=Marquand. H. & B.=Holmes and 

 Batters. C.I. = Channel Islands (new to). G. = Guernsey (new to). 

 B. = Britain (new to). c. = common. f.c. = fairly common. a.= 

 abundant. La. = locally abundant. r.=rare. v.r.= very rare. 



MYXOPHYCEiE. 



CocCOGOIiE^. 



C.I. Aphaxocapsa marina Hansg. N.W. 1. W. 4, 8. f.c. 



C.I. Anacystis parasitica Kiitz. {Polycystis jyaUida H. & B. Rev. 



List). On Calothrix sp. and Cladopliora sp. W. 8. 

 G. Dermocaepa Leibleinije Born. On CalotJirLv Crustacea, r. 

 G. D. PBASiJfA Born. On various algse. c. 



h2 



