210 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 CAMrVLODISCUS Ehrenb., 1S41. 



992. Campylodiscus Hibernicus Ehrenb. 



[Syn. Campylodiscus cosiaius ^V. Sm.]. 



S.W.— Cuswovth (!) 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 NITZSCHIEjE. 



Gen'us HANTZSCHIA Griin., 1877. 



993. Hantzschia amphioxys (Ehrenb.) Grun. 



[Syn. Nitzschia amphioxys (Ehrenb.) ^V^ 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. Tryblionella punctata W. Sm.]. 

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



Trans. Y.X.U., 1901 (pub. July 1901). Pot. Series, Vol. 5. 



