243 
ADDITIONS TO THE FRESHWATER ALG 
OF WEST YORKSHIRE. 
WM. WEST, F.L,S.; 
Lecturer on Botany and Materia Medica at the Bradford Technical College. 
THE following list has been gradually accumulating since the publi- 
cation of the last list of additions and is the result of the examination 
of a very large number of gatherings. I have been most ably assisted 
in the work by the keen judgment and knowledge of my son, 
G. S. West, who has also helped in the collection of the material, 
several lots of which, such as that from Whernside and Moughton 
Fell, have been collected by him alone. The Penyghent gatherings 
were in the Ribble drainage area. Many new localities are given for 
species previously recorded, and there are seventy additional species 
and varieties (before each of which is placed an asterisk) to those 
hitherto enumerated for the Riding. ‘The total number of Algz 
now on record for West Yorkshire is 540 species and 37 varieties 
and forms. 
Criass— FLORIDE#. 
ORDER—SQUAMARIACE#. 
Hildenbrandtia rivularis (Liebm.) J. Ag. On stones in rill, 
near Rawdon; H. T. Soppitt. Small dark red patches on the 
surface of dripping rocks, Shipley Glen ; Gordale. 
OrvER—HELMINTHOCLADIE%®. 
Batrachospermum vagum (Roth.) Ag. *Var. keratophytum 
ory. On stones in running stream, Horton-in-Ribblesdale. 
Chantransia pygmza Kiitz. In a similar locality to the last, 
out not with it. 
CLtass—CONFERVOIDEH HETEROGAME%. 
OrpER—(EDOGONIACE. 
*Cdogonium itzigsohnii DeBary. Ingleborough. 
*Cdogonium delicatulum Kiitz. Askern. 
CLtass—CONFERVOIDE ISOGAME. 
ORDER—CONFERVACE. 
Cladophora glomerata (Linn.) Kiitz. Moughton Fell ; Holden 
Gill, near Keighley. 
August 18qr. 
