32 NELSON AND TAYLOR : ON YORKSHIRE MOLLUSCA. 



Subfossil shells are thrown up by the moles in the neigh- 

 bourhood of Askern. 



2. Lune and Ribble — Pond close to the River Ribble at Gisburn, W.D.R.I 



3. Vale of York — Plentiful in streams and dykes about Milford ! South 



MilfordJ Bishop Dyke at Milford ! and Hambleton ! abundant 

 ■ in the River Foss, W. C. Hey ; Askham, W. C. Hey ; Malton, 

 J.D.B. ; common in a Mill goit at Newthorpe ! River Ouse at 

 Naburn and Bishopthorpe, R. M.C. ; River Derwent at Kirkham 

 Abbey, W. C. Hey. 



4. Humber—Goole, R.D.M. ; ditch near Gateforth ! in a ditch near canal 



at Selby ! 



5. Hatfield and Thome — Scarce in Gravel Drain, W.D.R. ! common in a 



ditch parallel with Black Bank Drain, W.D.R. ! 



6. Trent — Conisborough, J.W. 



7. Went Vale — Bentley near Doncaster! ditch near Askern ! occasionally 



in immense abundance- in the River Went at Went Bridge ! com- 

 mon in the mill pond at Ackworth, C.A. ; Ackworth School Canal, 

 G. F. Linney ; Hemsworth Dam, H, N. Brady ; Nostel Lake, 

 H. Richardson. 



12. Lower Calder — Moderately common in the Wakefield and Barnsley 



Canal, J.H., at Wakefield, H.P. ; abundant at Wintersett Reservoir, 

 C.A. ; New Miller Dam, J.W. 



13. Airedale — Bingley, J.W. ; a few in a reach of the river Aire at Swilling- 



ton, in 1872 ! 



17. Wensleydale — Snape, H.C. ! 



18. Swaledale — Amongst Fontinalis antipyretica in the Codbeck, Thirsk, 



J. J. Binns*, 1855 ; not unfrequent in ditches at Newsham Carr, 

 J. H. Davies, 1855. 



20. Lower Tees — Apparently not occurring in the district, J. W. Watson. 



22. Upper Derwent — Appears in the late Mr. Bean's catalogue of Scar- 



borough shells, but is not included in Mr. J. H. Ashford's. 



23. Chalk Wolds — Moderately abundant at Swinemoor, in a ditch at Fig- 



ham, and in the River Hull, J.D.B. ; moderately plentiful in the 

 canal and ditches at Brigham, L. B. Ross ! 



24. Holderness — LevenCanal, J.D.B. ; Skidby Drain, J.D.B. ; moderately 



plentiful in the canal and ditches at Foston, L. B. Ross ! 



Var. depressa C. Pfr. 



3. Vale of York — There are specimens in the British Museum labelled as 

 from York, R.M.C. 



Trans.Y.N.U., 1880 (pub. 1883). Series C 



