W. WEST AND G. S. WEST: ALGA-FLORA OF YORKSHIRE. 1 77 



N.W.— Mickle Fell. 

 N.E. — Strensall. 



883. Navicula garg-anica Rabenh. 

 Mid W. — Harrogate (G. Norman). 



S.E. — Cottingham ; ditch near River Hull ; Anlaby to Hessle 

 Road (G. Norman). 



884. Navicula exilis (Kiitz.) Grun. 



S.W. — Askern and Hatfield districts ; Firsby Reservoirs ; 

 Doncaster (!) town water ; Rossington (M. H. Stiles). WooUey. 

 Cullingworth. Keighley. Liversedge (Rev. W. Fowler !) Coley, 

 near Shelf. Hebden Bridge. 



Mid W. — ^Baildon. Boston Spa. Horton-in-Ribblesdale. 



N.E. — Cornelian Bay. Saltburn. Terrington. 



S.E. — Near Meaux Abbey. Beverley. Routh. Waghen. 

 Tickton. Loftsome Bridge, near Wressle. Newsholme. 



885. Navicula follis Ehrenb. 



S.E. — Market Weighton Canal ; Beverley Parks (G. Norman). 



886. Navicula latiuscula Kiitz. 

 S.W.— Hatfield district (M. H. Stiles). 



887. Navicula Amphisbcena Bory. 



S.W.— Askern, Cusworth, and Hatfield districts (M. H. Stiles). 

 Near Doncaster. Goole ; Roche Abbey (E. Hunter ; M. H. 

 Stiles ; J. N. Coombe). Shipley. Near Bingley. 



Mid W. — Harrogate; Ripley (G. Norman). Adel. Arthing- 

 ton. 



N.E. — Whitby. Marske. Scarborough Mere. Seamer. 

 Strensall. 



S.E.^ — -Waghen. Beverley. Loftsome Bridge, near Wressle. 

 Near Stoneferry ; Cottingham ; Haltenprice ; Market Weighton 

 Canal (G. Norman). 



888. Navicula limosa Kutz. 



S.W. — Cusworth, near Doncaster. Askern and Hatfield 

 districts ; Firsby reservoirs ; Roche Abbey ; Rossington (M. H. 

 Stiles). 



