TRANSACTIONS OF THE YORKSHIRE NATURALISTS* UNIQNi 

 PART 25, 

 ISSUED TO MEMBERS FOR THE YEAR 1899.- ^ 



THE 



ALGA^FLORA OF YORKSHIRE 



A COMPI^ETE ACCOUNT OF THE KNOWN 



, FRESHWATER ALG/E OF THE COUNTY. 



W. WEST, F.L.S., 



An Ex-President of the Yorkshire Naturalists' Union j 



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



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

 , T Cambridge ; Professor of Natural History at the Royal 

 Agricultural College, Cirencester. 



CONTENTS 



OF Third lN^TAtlMENX,(F6uR Sheets). 



Class ChlorophycejE — 

 Order Go NjUGATiE-^ 



Family Desmidiace/e (6 genera) 

 .Order Siphoned- (2 families) 

 " Order Protococcoide^^- 



Family Volvocine^ (7 genera) 

 ~ ' Family PalmellacejE (49 genera) 

 Class MYXoPHYCEiS; — 



Order Hormogone^e (6 farriilies) 

 Order CnAM^siPHONACEiE (i genus) 

 Order Chroococcoide^ (17 genera) 



ClaSS'BACILLARIEiE — v ;! 



\ Order Raphide^ (S genera) ... 



PAGES. 



158—164 



LEEDS : 



PRINTED FOR THE YORKSHIRE NATURALISTS' UNION 

 BY TAYLOR BROTHERS. 



JULY, 19OI. 



