NOTES ON THE FRESH-WATER ALG OF 
THE EAST RIDING OF YORKSHIRE, 
WILLIAM WEST, F.L.S., 
Assisted by G. S. WEST (National Scholar in Biology). 
In 1878 and 1879, I made some small gatherings of Algz on Riccall 
Common, which were not exhaustively examined until recently. 
They have proved to be rich in Desmids but poor in Diatoms. In 
1892, my sons and I made a fair number of gatherings in a walk 
from Beverley, through Tickton and Routh, past Meaux Abbey to 
Waghen and Sutton : these would have proved richer had they been 
collected later in the season, but as it is, they are fairly rich in 
Diatoms. Mr. W. H. Youdale, F.R.M.S., of Cockermouth, kindly 
made a good gathering for me at Hoenace Mere, and I have also 
to thank Mr. J. Beanland, of Bradford, who collected for me at 
Loftsome Bridge near Wressle and at Newsholme near Howden. 
The genera EZpithemia and Eunotia are poorly represented, though 
the scarcity of species of the latter genus is not to be wondered at 
from such a flat district. 
ALG&, 
Ciass CONFERVOIDEZH HETEROGAM, 
OrDER (EDOGONIACEA, 
Cdogonium platygynum Wittr. Riccall Common, 
Crass. cell, veg. 9°6—11p; altit. 3—4 plo major ; 
3 Oogon,. 262; i ees 
»  OOSpor. 21; 9» 16°3fy 
Crass CONFERVOIDEH ISOGAME, 
OrDER CONFERVACEA, 
Conferva bombycina Ag. forma genuina Wille. | Waghen; 
near Meaux Abbey ; Newsholme. 
Conferva bombycina forma minor Wille. Beverley; Riccall 
ommon ; Routh; near Meaux Abbey ; Waghen. 
Conferva floccosa (Vauch.) Ag. Waghen, 
Rhizoclonium flavicans Jurg. Newsholme, 
Chzetophora pisiformis (Roth.) Ag. Beverley, 
Draparnaldia plumosa Ag. Beverley. 
ee 
July 1893. 
