1^2 YORKSHIRE NATURALISTS UNION. 



S.E. — Beverley. 



850. Navicula cryptocephala Kiitz. 



S.W.— Bradford. Cullingworth. Roche Abbey (J. N. 

 Coombe ; M. H. Stiles). 



MidW. — Wigton Moor. Moughtoii Fell. Baildon. Kildwick. 



N.W.—Jervaulx Abbey. Dodd Fell. 



N.E. — Carlton Bank. Saltburn. 



S.E. — Tickton. Waghen. Newsholme, near Howden. River 

 Hull; Market Weighton Canal ; Dairycoats {G. Norman). 



Var. veneta (Kiitz.) V. H. [Syn. Nav'icnla veneta Kiitz.]. 



S.W. — Cullingworth. 



Mid W. — Shipley Glen. Bo.ston Spa. 



N.E. — Pilmoor, near Thirsk. 



S.E. — Newsholme. Market Weighton. 



851. Navicula angustata W. Sm. 



S.W. — Doncaster. Greetland, near Halifax. Chellow Dean. 

 Bingley. A\'orth Valley, near Keighley. Thome Moor 

 (G. Norman). Crimsworth Dean. Ogden Clough. 



Mid W.— Dropping Well, Knaresborough. Moughton Fell. 

 Holden Gill, near Keighley. 



N.W.— Mickle Fell. Cautley Spout. 



N.E. — Scarborough Mere. 



S.E. — Near Meaux Abbey. Beverley. Tickton. Waghen. 

 Newsholme. 



852. Navicula rhynchocephala Kiitz. 



S.W. — Greetland, near Halifax. Chellow Dean. Cullingworth. 

 Doncaster town water (M. H. Stiles). Goole ; Roche Abbey 

 (E. Hunter). Marley, near Bingley. 



Mid W. — Harrogate (G. Norman). Pond at Horsforth. 

 Hawks worth Springs. 



N.W.— Reeth. 



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

 Tickton. Near Meaux Abbey. Market Weighton, Cottingham ; 

 Risby Pond; Haltenprice; Market Weighton Canal (G. Norman). 



Trans. Y.N.U., 190: (pub. July igoi). Bot. Scries, Vol. 5. 



