172 Proceedings of the Royal Physical Society. 



Lightfoot ("Flora Scotica," 1789), Greville ("Flora Edin- 

 ensis/' 1824, and "Algse Britannicse," 1830), M'Bain (see 

 List of Alg^ in "East Neuk of Fife," 1st edition, 1862), Sir 

 J. Eichardson, Arnott, Hassall, and others. On consulting 

 these and other sources of information on the subject, how- 

 ever, I find that little appears to have been done in particu- 

 larising the localities where many of the rarer species are 

 obtained ; and since these are, for the most part, described so 

 vaguely as to afford but little help to other collectors, it has 

 been my endeavour to remedy this by going over the ground 

 afresh, and stating the localities as explicitly as possible. 

 A number of new species and many good localities are also 

 now for the first time recorded, so that it is hoped the list 

 may be found of service to those studying the Algse of the 

 Firth of Forth. 



The classification adopted is that of the late Professor 

 Harvey, as modified and improved by Professor Agardh of 

 Sweden. 



CHLOKOSPEEME^. 



Order CoNFERVACEiE. 



Cladophora rupestris, . . Common, between tide marks. 



„ laetevirens, . . Eocks to the east of Lady's 



Tower, Elie; fine at Chapel- 

 ness, Earlsferry {G. W. T.); 

 fine at Prestonpans {G. W. T), 

 between tide marks. 



„ refracta,. . . Eocks to the east of Lady's Tower, 



Elie; very fine at Kincraig 

 pools, Earlsferry, near low 

 water {G. W. T). 



„ alhida, . . . Elie (M'Bain). 



„ lanosa, . . . Black Eocks, Leith, on Fttrcel- 



laria fastigiata {Arnott and 

 Greville) ; Longniddry Point, 

 parasitic on Polyides lumhri- 

 calis and on some of the 

 smaller alg« {G. W. T.) ■ Elie, 



