TRANSACTIONS OF THE YORKSHIRE NATURALISTS' UNION. 



PART 23, 



ISSUED TO MEMBERS FOR THE YEAR 1897, 



THE 



ALGA-FLORA OF YORKSHIRE 



A COMPLETE ACCOUNT OF THE KNOWN 



^FRESHWATER ALG^ OF THE COUNTY. 



W. WEST, F.L.S., 



An Ex-President of the Yorkshire JTaturalists' Union ; ' ' 



AND 



a. S: WEST, B.A., A.R.C.S., 



Hutchinsoii Research Student, and formerly Scholar of St. John's College, 



TCambridgc ; Professor of Natural History at the Royal 



Agricultural College, Cirencester. 



LEEDS: 



PRINTED FOR THE YORKSHIRE NATURALISTS' UNION 

 BY TAYLOR BROTHERS. 



DEC, 1900.- 



