56 NELSON AND TAYLOR : ON YORKSHIRE MOLLUSCA. 



11. Upper Ca/c/er— Halifax, H.C., 1877 ! Luddenden Valley, 1875, J.C. 



12. Lower Calder — Wakefield and Barnsley Canal, 1871, H.S. ; common 



throughout the Wakefield district, J. H., 1874; Barnsley canal, 

 J.W., 1883 ; Crofton, Kirkthorpe, and Ryhill, J.W., 1885. 



13. Airedale — Leeds and Liverpool canal at New Wortley, 1871, H.S. ; 



and at Calverley, 1872, H.S. ; Lofthouse, common, G.R., 1882 ; 

 Newsam Green near Woodlesford, 1872, H.S. ; Swillington Bridge, 

 Jan. 1865 ! and 1872 ! ditch, Leventhorpe Pastures, 1877 ! Waterloo 

 near Buslingthorpe, Leeds, Feb. 1865 ! and April 3rd, 1866 I Thorp 

 Hall Pastures, Jan. 1865, J.B. ; one specimen from pond. Black 

 Hills, Leeds, June 28th, 1883 ! common in a pond north of Round- 

 hay Lime-hills, March i8th, 1882, W.D.R. I Manston! small brook 

 near Wilkinson's Mill, Hunslet, May 7th, 1861, since built over, 

 Goodman-street now occupying the site ! 



17. Wensleydale — Masham I Fearby Cross, near Masham, H.P., 1877 ; 

 ponds, Masham, April, 1881, J. Carter! Marfield pond, near 

 Masham, common, H.P. ; Skelton, near Ripon I 



i8a. Vale of Mowbray — Vale of Mowbray, W. Grainge, 1859 ; very com- 

 mon in ponds and ditches about Thirsk, J. H. Davies, 1855 ; 

 plentiful in brickponds on Pilmoor, Oct. 7th, 1882, W.D.R. ! 



20. Lower Tees — General in the Lower Tees district, J. W. Watson ; 



Middlesbrough, B. Hudson, 1883 ; abundant in a small stream 

 bordering the race-course, Mandale Marshes, near Stockton, March 

 7th, 1885, B. Hudson ; in several waters near Roseberry, 1879, 

 C.A. ; Coatham Marshes, Ferguson's Nat. Hist, of Redcar, i860. 



21. Eskdale — On the coast near Whitby, 1875, G. Roberts. 



22. Upper Derwent — Scarborough, W, Bean, 1871, 



23. Chalk Wolds — Pond near Leckonfield, 1880, J.D.B.; Bridlington, 



J. S. Gibbons, 1881 ; Bridlington, abundant in a pond west of 

 railway-line to Scarborough, August, 1885, G. Wingate! 



24. Holderness — Common everywhere about Beverley, Swinemoor, Kitchen 



lane, Weel Carrs, Commonbank Nook, and fine in Long lane, 

 J.D.B., 1882 ; ditches at Figham, where water is strongly impreg- 

 nated with iron, J.D.B., 1880; common at Figham, May 29th, 

 1882, W.D.R.! rejectamenta of Beverley Beck, J.D.B. ; common 

 about Hull, J.D.B., 1878 ; Cottingham road, Hull, 1878, J.D.B. ; 

 Spring Dyke, Hull, 1878, J.D.B. ; Holderness road, Hull, 1879, 

 J.D.B. ; fine in ponds at Hornsea Mere, 1881, J.D.B. ; common in 

 Hornsea Mere, June 6th, 1881, W.D.R. ! plentiful in R. Hull at 

 Driffield, L. B. Ross, 1882 ; Wansford, L. B. Ross, 1S83 ; common 

 in ditches at Meaux, May 29th, 18S2, W.D.R. ! 



Trans. Y.N. U., 18S4 (pub. 18S6). Series C 



