THE MARINE ALGAE OF THE L.M.B.C. DISTRICT. 123 



OBSERVATIONS ON THE MARINE ALGAE OF 

 THE L.M.B.C. DISTRICT (Isle of Man Area). 



By R. J. Harvey-Gibson, M.A., F.L.S., Professor of 

 Botany; Margery Knight, B.Sc, Assistant 

 Lecturer in Botany; and Hilda Cobtjrn, B.Sc, 

 Hartley Botanical Laboratories, University of 

 Liverpool. 



In 1890 a paper was published by one of us 

 (R. J. H.-G.) on the Marine Algae of the Liverpool 

 Marine Biological Committee's District, 1 which was 

 itself a revision and extension of a previous paper 

 published in 1889. 2 The period of twenty-three years 

 which has elapsed since the compilation of the former of 

 these lists has not, so far as we know, been productive 

 of any algological research in the district, and conse- 

 quently we have thought it worth while to place on 

 record some observations made by us during two Easter 

 Vacation periods (1911 and 1912), more with the view 

 of showing how much yet remains to be done than of 

 attempting to compile a complete catalogue of the 

 Marine Algae even of the limited area to which our 

 attention has been more especially directed during the 

 period in question, viz., the south end of the Isle of 

 Man. 



We have, for convenience of reference, continued 

 to use the classification and nomenclature followed in 

 the last Report, 1 although the taxonomy of Marine Algae 

 has undergone considerable modification since the date 

 of Holmes and Batters' " Revised List of the British 

 Marine Algae," 3 the classificatory system in which was 

 followed on that occasion. We have, however, adopted 

 such changes in generic and specific nomenclature as 



