W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 203 



Mid W. — Ripley (G. Norman). Blubberhouses; Roundhay 

 (W. B. Turner). Holden Gill, near Keighley. Adel. Buckden. 

 Staveley Dam, near Knaresborough. Hawksworth. 



N.W.— Winch Bridge. 



N.E.— Whitby. Scarborough Mere. Strensall! (W. B.Turner). 

 Scalby Beck. 



S.E. — Beverley. Newsholme. Loftsome Bridge, near Wressle. 

 Skirlaugh. Reservoir Waterworks, Hull; Market AVeighton (G. 

 Norman), 



Var. Ehrenbergii (Kiitz.) v.H. 



[Syn. D. Ehrenbergii Y^xAi.; D. grande W. Sm.]. 



S.W. — Trough near Shipley. 



Mid W. — Markington (Rev. J. S. Tute). Malham Tarn Bog. 



S.E.— Hull (G. Norman). 



974. Diatoma hiemale (Lyngb.) Heib. 



[Syn. Odontidium hiemale (Lyngb.) Kiitz.]. 



S.W. — Wilsden. Greetland, near Halifax. Crimsworth Dean. 



Mid W. — Blubberhouses (W. B. Turner). Holden Gill, near 

 Keighley. 



N.W.— Mickle Fell. Sedbergh. Howgill Fells. 



N.E. — Lockton. Scarborough Mere. Rievaulx Abbey. 

 Carlton Bank. 



S.E.— Beverley. 



Var. mesodon (Kiitz.) V.H. 



[Syn. Odontidium mesodon Kiitz. J. 



S.W. —Bradford. Roche Abbey (J. N. Coombe). Worth 

 Valley, near Keighley. Denholme. Ogden Clough. Crimsworth 

 Dean. Hebden Bridge. 



Mid W. — Blubberhouses; Roundhay (W. B. Turner) Shipley 

 Glen. Holden Gill, near Keighley. Malham Cove. Whernside. 

 Kilnsey. 



N.W.— Mickle Fell. Holwick. Dodd Fell. Great Shunnor 

 Fell. Calf Beck, Howgill Fells. 



975. Diatoma anceps (Ehrenb.) Grun. 



N.W. — Bog, near Widdale Beck, abundant, iv. 1898. 



