W. WEST AND G. S. WEST: ALGA-FLORA OF YORKSHIRE. 169 



840. Navicula bicapitata Lagerstedt. 

 S.W.— Cullingworth. 



Mid W. — Cocket Moss, near Giggleswick. Bog two miles 

 south of Clapham. 



841. Navicula appendiculata (Ag.) Kiitz. 



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

 Mid W. — Linn Gill. Cocket Moss, near Giggleswick. 

 Bowland Knotts. Giggleswick Common. 

 N.W.— Bog near Widdale Beck. 

 N.E. — Carlton Bank. Near Scarborough. 

 S.E.— Newsholme. 



842. Navicula mesolepta Ehrenb. 



[Syn. Pinnuhiria mesolepta \V. Sm.]. 



S.W. — Marley, near Bingley. Cullingworth. Farnley. Cragg 

 Vale, towards Blackstone Edge. Near Shipley. 



Mid W. — Harrogate (G. Norman). Boston Spa. Whernside. 

 Ribblehead. 



N.W.— Mickle Fell. 



N.E. — Near Scarborough. Teriington. Saltersgate (G. Nor- 

 man. 



S.E. — Tickton. Beverley. Near Meaux Abbey. Haltenprice; 

 Hornsea Peat deposit ; Beverley Parks (G. Norman). 



843. — Navicula Legumen Ehrenb. 

 S.W. — Firsby reservoirs and Doncaster town water 

 (M. H. Stiles). 



844. Navicula oblonga Kiitz. 



[Syn. Pinnularia oblonga (Kiitz.) Rabenh.j. 

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

 Roche Abbey (M. H. Stiles; J. N. Coombe). Doncaster. Brad- 

 ford. Bingley. 



Mid W. — Baildon. Adel. Harrogate; Malham Cove (J. M. 

 Kirk). 

 N.W. — Jervaulx Abbey. 

 N.E. — Strensall. Seamer. 



