W. WEST AND G. S. WESt : ALGA-FLORA OF • YORKSHIRE. 17 1 



Mid W.— Killinghall (G. Norman). 

 N.W.— Mickle Fell. Dodd Fell. 



S.E. — Tickton. Wawne ; Cottingham ; Stoneferry (G. 

 Norman). 



849. Navicula radiosa Kiitz. 



[Syn. Pinuularia radiosa (Kiitz.) Rabenh.]. 



S.VV. — Askern, Cusworth and Hatfield districts; Rossington; 

 Doncaster (!) town water and Firsby reservoirs (M. H. Stiles). 

 Morley. Elslack. Mirfield. Greetland, near Halifax. Roche 

 Abbey (E. Hunter; M. H. Stiles; J. N. Coombe). Denholme. 



Mid W.— Baildon. South Milford (VV. B. Turner). Harro- 

 gate (G. Norman). Malham Tarn. Moughton Fell. Adel. 

 Above Eldwick. Holden Gill, near Keighley. Otley. Bolton 

 Woods. Knaresborough. Boston Spa. Crook Gill, one mile 

 from Buckden. 



N.VV. — Cautley Spout. Jervaulx Abbey. Great Shunnor Fell. 



N.E.— Strensall! (VV. B. Turner). Pilmoor, near Thirsk. 

 Scarborough Mere. Scalby Beck. Hayburn Wyke. River 

 Derwent at Forge Valley. Staindale. Ingleby Greenhow. 



S.E. — Beverley. Tickton. Near Meaux Abbey. Routb. 

 Waghen. Newsholme, near Howden. Riccall Common. Market 

 Weighton. Cottingham; River Hull; Haltenprice; Hornsea 

 Peat Deposit; Reservoir Waterworks, Hull (G. Norman). 

 Var. acuta (W. Sm.) V. H. 



[Syn. Pinnularia acuta W. Sm,]. 



S.W.— Roche Abbey (M. H. Stiles; J. N. Coombe). Cus- 

 worth district (M. H. Stiles). Near Shipley. 



Mid W. — Malham Tarn Bog. Penyghent. 



N.W.— Mickle Fell. 



N.E. — Strensall. Near Scarborough. 



S.E.— Cottingham; Skirlaugh ; Risby Pond; Driffield; 

 Wawne; Market Weighton Canal; Spring Ditch; Beverley (G. 

 Norman). 



Var. silesiaca (Bleisch). [Syn. Pinnularia radiosa var. 



silesiaca (Bleisch) Rabenh.]. 



