1 66 YORKSHIRE NATURALISTS' UNION. 



S. E. — Market Weighton ! ; Hornsea Peat Deposit ; Spring 

 Ditch (G. Norman). 



828. Navicula viridis Kiitz. 



[Syn. Pinnularia viridis (Ehrenb.) Rabenh.]. 



S.W. — Askern, Cusworth, and Hatfield districts ; Firsby 

 Reservoirs ; Rossington ; Doncaster (!) town water (M. H. 

 Stiles). Cragg Vale, towards Blackstone Edge. Roche Abbey 

 (E. Hunter; M. H. Stiles ; J. N. Coombe). Greetland, near Hali- 

 fax. Bradford. Oxenhope. Keighley Moor. 



Mid W.— Harrogate (G. Norman). South Milford (W. B. 

 Turner). Ilkley. Kildwick. Malham Tarn. Leathley. Black 

 Hill, near Settle. Cowgill Wold Moss, Widdale Fell. Boston 

 Spa. Horsforth. Bowland Knotts (pure gathering). Bog two 

 miles south of Clapham. Whernside. Penyghent. Ribblehead. 



N.W. — • Penhill Beacon. Bog near Widdale Beck (with 

 auxospores). Jervaulx Abbey. Mickle Fell. Baugh Fell. 



N.E. — Saltburn. Saltersgate (G. Norman). 



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

 Meaux Abbey. Tickton. Near Sutton. Newsholme. Skipwith 

 Common (Rev. W. Fowler !) Market Weighton. Cottingham; 

 Spring Ditch ; Skirlaugh ; Driffield ; Haltenprice ; Hornsea 

 Peat Deposit ; reservoir waterworks, Hull (G. Norman). 

 Var. commutata Grun. 



[Syn. Navicula hemiptera auct. nee Kiitz.]. 



S.W. — Askern district; Doncaster town water (M. H. Stiles). 



829. Navicula hemiptera Kiitz. 



N.E. — Rocky stream, Saltersgate (G. Norman). 



830. Navicula cardinalis Ehrenb. 



[Syn. Pinnularia cardinalis Ehrenb.]. 

 S. W. — Doncaster. 

 Mid W.— Adel Bog. Baildon. 

 N.W.— Cronkley Fell. 

 S.E. — Hornsea Peat Deposit (G. Norman). 



831. Navicula lata Brdb. 



[Syn. Pinnularia lata (Breb.) Rabenh.]. Rare. 



Trans Y.N.U., igoi (pub. July igoi). Bot. Series, Vol. 5. 



