83 



A REVISED LIST of the MAEINE ALGM of the 

 L.M.B.C. DISTRICT. 



By R. J. Haevey Gibson, M.A., F.L.S., F.R.S.E., 



LECTURER ON BOTANY IN UNIVERSITY COLLEGE, LIVERPOOL. 



With Plates II., III., IV., V. 



December 12th, 1890, and January 23rd, 1891.] 



The present Report on the Marine Algae of the district 

 mapped out by the Liverpool Marine Biological Com- 

 mittee as the area of their explorations is a revision and 

 extension of the First Report on the same subject 

 presented to this Society in 1889.* In that paper I 

 incorporated the observations of previous investigators 

 so far as these seemed of value for the purposes of the 

 Report, and recorded all the species noted by them 

 whether I had myself observed them or not. The list so 

 compiled was necessarily incomplete and faulty — incom- 

 plete, seeing that a more careful examination of our coast, 

 keeping in view the very numerous additions to the list of 

 British Marine Algae since the days of Harvey and 

 Greville, could not but result in a substantial increase to 

 a local list such as the present, — faulty, because many 

 species have been recorded as occurring on our shores 

 almost certainly through mistaken identification, although 

 I was not able at the time to express an opinion on the sub- 

 ject. After consulting algologists like Mr. E. A. L. Batters, 

 Mr. A. W. Bennett and others who have carefully studied 

 the British Marine Flora, I have decided to exclude all such 



* Proc. Biol. Soc, Liverpool, vol. iii., pp. 128 — 154. 

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