54 
STUDIES OF BRITISH FRESHWATER ALG^E. 
DESCRIPTION OF PLATE. 
Four nncrophotograplis (by E. J. Salisbury), illustrating the character 
of the algal vegetation in the four phases. 
February 5th, 1905 (Winter-phase). Filaments of Melosira and 
Fragilaria are most conspicuous, but also unicellular forms like Synedra, 
Cymatojjleura, etc. 
April 16th, 1905 (Spring-phase). Numerous filaments of Sinrogyra^ 
some with zygospores. Cladophora at the upper end of the photograph. 
July 9th, 1905 (Summer-phase). Cladophora, bearing abundant Cocconeis. 
November 12th, 1905 (Autumn-phase). Cladophora bearing numerous 
young plants of CEdogonium. 
DESCRIPTION OF CHARTS. 
I. — Chart to shoAV occurrence of principal filamentous Algm in Fish Pond, 
Abbot’s Leigh, during the years 1904-1907. 
II. — Chart to show relation between Cladophora and its two most important 
epiphytes ( Cocconeis, Sijnedra radians ) in the Fish Pond, Abbot’s 
Leigh, 1904-1907. 
