2IO YORKSHIRE NATURALISTS' UNION. 



N.W.— Cronkley Fell. Dodd Fell. 



N.E. — Staindale. Carlton Bank. 



S.E. — Haltenprice ; Skirlaugh (G. Norman). 



991. Surirella Craticula Ehrenb. 



S.E. — Hornsea Peat Deposit, very rare (G. Norman). 



Genus CAMPVLODISCUS Ehrenb., 1S41. 



992. Campylodiscus Hibernicus Ehrenb. 



[.Syn. Campylodiscus costaius W. Sm.]. 



S.W.— Cusworth (!) and Askern Districts (M. H. Stiles). 

 CuUingworth. 



Mid W. — Baildon. Malham Tarn. Horton-in-Ribblesdale. 

 .South of Cray Moss. 



S.E. — Spring Ditch ; Cottingham ; Haltenprice ; Newbald ; 

 Hornsea Peat Deposit ; Market Weighton Canal (G. Norman). 



Family NITZSCHIEM. 

 Genus HANTZSCHIA Grun., 1877. 



993. Hantzschia amphioxys (Ehrenb.) Grun. 



[Syn. Nitzschia amphioxys (Ehrenb.) W. Sm.]. 



S.W. — Askern and Cusworth districts ; Doncaster (!) town 

 water ; Rossington (M. H. Stiles). Roche Abbey (M. H. Stiles; 

 J. N. Coombe). Goole. Bradford. Chellow Dean: Shipley. 



Mid W. — Killinghall ; Harrogate (G. Norman). Baildon. 

 Bolton Woods. 



N.W.— Mickle Fell. River Ure. 



N.E. — Strensall. Scarborough Mere. Rievaulx Abbey. 

 Saltburn. Carlton Bank. 



S.E. — Routh. Near Meaux Abbey. Waghen. Benning- 

 holme ; Wawne ; Cottingham ; Market Weighton Canal (G. 

 Norman). 



Genus NITZSCHIA Hass., 1845. 



994. Nitzschia punctata (W. Sm.) Grun. 



[Syn. Trybiioiiei/n punctata W, Sm.]. 

 S.E. — Market Weighton Canal : pond, Stepney (G. Norman). 



Trans, Y.N.U., 1901 (pub. July 1901). \,o%. Series, Vol. 5, 



