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



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

 Malham Tarn. Near Buckden. 



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

 Snaizeholme Fell. 



N.E. — Moorland stream, near Scarborough. 

 S3 2. Navicula alpina (W. Sm.) Ralfs. 



[Syn. Pinnularia alphia W. Sm.]. 

 Rare. 



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

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



833. Navicula borealis (Ehrenb.) Kiitz. 



[Syn. Finniilaria 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 Pa/'en/iorsfii Kalfs ; P. interrupta 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. Pinuularia 

 Bi'ebissonii (Kiitz.) Rabenh. ; Pinnularia stauro?iei- 

 for^nis W, Sm.]. 



