467 
YIII . — A Contribution to the Freshwater Algae of the 
South of England . 
By W. West, F.L.S., and G. S. West, A.R.C.S. 
Communicated by A. W. Bennett, F.L.S., F.R.M.S. 
With Appendix by A. W. Bennett, F.L.S., F.R.M.S. 
( Read Oct. 20th , 1897.) 
Plates YI. and YII. 
Although much has already been done towards our knowledge of 
the distribution of these interesting plants in this part of the country, 
and this paper is intended to supply a further addition to this know- 
ledge, yet many large districts still remain from which careful collecting 
is required. The chief workers in this field during recent years have 
been Mr. W. Joshua, Mr. A. W. Bennett, and Mr. E. D. Marquand ; 
and the districts included in their researches are portions of Surrey, 
Hampshire, Wiltshire, Devonshire, and Cornwall. The following is a 
list of the more important papers dealing with Freshwater Algae from 
the South of England since the publication of Hassall’s ‘British 
Freshwater Algae’ in 1845, and Ralfs’ ‘British Desmids ’ in 1848 : 
1. Joshua, W. Notes on British Desmidie®. Journ. Bot., xx. 
(1882) p. 300. 
2. Marquand, E. D. The Desmids and Diatoms of West Cornwall. 
Trans. Penzance Nat. Hist. & Antiq. Soc., i. (1882-3) pt. 3. 
3. Joshua, W. Notes on British Desmidieae. Journ. Bot., xxi. 
(1883) p. 290. 
4. Marquand, E. D. Freshwater Algae of the Land’s End District. 
Trans. Penzance Nat. Hist. & Antiq. Soc., 1885. 
5. Bennett, A. W. Freshwater Algae of North Cornwall. Journ. 
Roy. Micr. Soc., Feb. 1887. 
6. „ „ Freshwater Algae and Schizophyceae of Hamp - 
shire and Devonshire. Journ. Roy. Micr. Soc., Feb. 1890. 
7. Roy, J. Freshwater Algae of Enbridge Lake and Vicinity, 
Hampshire. Journ. Bot., xxviii. (Nov. 1890). 
8. Bennett, A. W. Freshwater Algae and Schizophyceae of South- 
west Surrey. Journ. Roy. Micr. Soc., Feb. 1892. 
Also in part the two following papers : — 
9. West, W. and G. S. New British Freshwater Algae. Journ. 
Roy. Micr. Soc., Dec. 1893. 
10. „ „ On some New and Interesting Freshwater 
Algae. Journ. Roy. Micr. Soc., April 1896. 
EXPLANATION OF PLATES 
(see pp. 468, 469). 
