W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 167 



Mid W. — Blubberhouses (W, B. Turner). Appletreewick. 

 Malham Tarn. Near Buckden. 



N.W.— Mickle Fell. Great Shunnor Fell. Great Sleddale. 

 Snaizeholme Fell. 



N.E. — Moorland stream, near Scarborough. 



832. Navicula alpina (W. Sm.) Ralfs. 



[Syn. Pinnularia alpina W. Sra.]. 

 Rare. 



S.W. — CuUingworth. Keighley Moor (iv. 1897). 

 N.W.— Mickle Fell. Bog near Widdale Beck. 



833. Navicula borealis (Ehrenb.) Kiitz. 



[Syn. Pinnularia borealis Ehrenb.]. 

 Mid W.— Bolton Woods. Ingleton. 

 N.E. —Carlton Bank. 

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



834. Navicula Rabenhorstii (Ralfs) Grun. [Syn. 

 Pinnularia Rabenhorstii KdXk; P. interriipta Rabenh.]. 



S.W. — Marley, near Bingley. 



Mid W. — Harrogate (G. Norman). 



N.W.— Cronkley Fell. Great Shunnor Fell. 



N.E.^Levisham. Glaisedale. 



S.E.— Risby Pond ; Wawne (G. Norman). 



835. Navicula divergens (W. Sm.) Ralfs. 



[Syn. Pinnularia divergens W. Sm.]. 

 Mid W.— Cocket Moss, near Giggleswick. 

 N.W. — Mickle and Cronkley Fells. Great Shunnor Fell. 

 N.E. — Carlton Bank. Seamer. 

 S.E. — Cottinghara (G. Norman). 



836. Navicula Hilseana Janisch. 

 S.W.— Cragg Vale, towards Blackstone Edge. 



Mid W. — Near Buckden. Bog two miles south of Clapham. 

 N.W.— Mickle Fell. 



837. Navicula Brebissonii Kiitz. [Syn. Pinnularia 

 Brebissonii (Kiitz.) Rabenh. ; Pinnularia stauronei- 

 forniis W, Sm.]. 



