W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 209 



Mid W. — Rombald's Moor. Near Otley. Houghton Fell. 



N.W.— Rokeby. 



N.E. — Marske. Strensall. 



S.E. — Near Meaux Abbey. Stoneferry Lane (Dr. Munroe). 



Van pinnata (W. Sm.) V.H. 



[Syn. Surirella pinnata W. Sm.]. 



S.W.— Rossington (M. H. Stiles). Near Bradford. Chellow 

 Dean. Bingley. Ogden Clougb. Near Shipley. Farnley. 



Mid W. — Eldwick. Adel Bog. Oughtershaw Moss. 



N.E. — Strensall. Dalton. Seamen Scalby Beck. Rievaulx 

 Abbey. Malton. 



S.E. — Beverley. Routh. Newsholme. Market Weighton. 

 Risby Pond ; Cottingham ; Haltenprice ; Hornsea Peat De- 

 posit ; ditch near river Hull (G. Norman). 



Van panduriformis (W. Sm.). 



[Syn. Surirella panduriformis W. Sm.]. 

 S.W.— Allerton. 



Mid W. — Harrogate (G. Norman). 



N.W.— Mickle Fell. Rokeby. 



S.E. — Tickton. Skirlaugh ; Market Weighton Canal (G. 

 Norman). 



Var. Crumena (Br^b.) Van Heurck. [Syn. Surirella 

 Crumena Br^b. ; S. Brightiuellii\N. Sm.J. 



S.VV. — Firsby reservoirs ; Rossington (M. H. Stiles). 



Mid W. — Birk Craggs, Harrogate (G. Norman). 



N.E. — Saltersgate (G. Norman). 



S.E. — Outlet, Hornsea Mere; Hornsea Peat Deposit; river 

 Hull ; near Stoneferry ; Reservoir Waterworks, Hull ; Market 

 Weighton Canal ; Haltenprice (G. Norman). 



990. Surirella spiralis Kutz. 



[Syn. Campylodiscus spiralis W. Sm.]. 

 S.W.— Roche Abbey (E. Hunter). Askern district (M. H. 

 Stiles). Cullingworth. Marley, near Bingley. Hebden Bridge. 

 Mid W. — Baildon, Hawksworth, 



