72 NELSON AND TAYLOR: ON YORKSHIRE MOLLUSCA. 



4. Number — Goole, Armin and Carlton, R. D. Maxwell ; Swinefleet, Aug. 



6th, 1887 ! Wressle, July 23rd, 1886, J. Beanland ! Carlton, near 

 Snaith ! ditch on roadside, Ermine St.. Castleford, March 22nd, 

 1868 ! ditches and ponds near Castleford, G. Roberts, Topog. and 

 Nat. Hist. Lofthouse, ii., p. 175, 1885; Ferrybridge ! Barlow, nr. 

 Selby! pond nr. Breighton ! Brotherton, Feb. 5th, 1S82I Sharlston 

 Common, Feb. 1887! Ditch near Scalm Park, May 8th, 1887! 

 pond near Wistow and ditch near Cawood ! and in ditches, Cow- 

 bridge near Newport, Sandholme, and Featherbed Lane near 

 Cavil Wood, May, 1887! 



5. Hatfield and Thome — Potteric Carr, J. Emmet ; grassy puddle, by R. 



Tome, May 14th. 1883. W.D.R. ! near Doncaster ! one in rejecta- 

 menta of a small stream near Bawtry, W. Gain, 18S6 ! Thorne 

 Waste, May 30th, 1888 (Nat. Hist. Journ., 1888, p. 158). 



6. Trent — Conisborough, June 2nd, 1873, J. Wilcock, Yorkshire Nat. 



Recorder, p. 204, July, 1873. Anston Crags, Sept. 1885, Rev. 

 Hilderic Friend ! 



7. Werit Vale — Ackworth, moderately common in ditches, but not every- 



where, C. Ashford, Q.J.C., i, p. 20, 1874; in the last field before 

 the East Hardwick Road from Ackworth to Went Vale; pond on the 

 left of Hessle Common, W. E. Brown. 1880; a marshy field about 

 midway between Ackworth and Wentbridge, W. Graveson. Nat. 

 Hist. Journ.. vii.. p. 3, Feb., 1883; Askern, J.W., Nat., 1876, 

 p. 191 ; Norton, G. Roberts, Topog. and Nat. Hist. Lofthouse, 

 1885, vol. ii, p. 237 ; field-pond close to Wentbridge, H. Richard- 

 son, Nat. Hist. Journ,, vol. vii., p. 4, 1883 ; Pollington! 



8. Dearne — Dearne and Dove Canal, June 30th, 1884, W. E. Brady ! 



12. Lower Calder — Common in a ditch at Stanley, more rarely at Cold 



Hiendley; very common at Horbury, J. Hebden, Q.J.C, vol. i, p. 

 4, 1874 ; St. Swithin's Wood and Ryhill. J, Wilcock, 12th Report 

 Wakefield Nat. Soc, p. 27, 1883 ; Stanley, 1863 ! 



13. Airedale — Ditches in Leventhorpe Pastures, April 3rd, 1866 ! Methley, 



April 1865, W.H.B. ; Garforth, April 17th, 1876! 



14. Malhamdale — Profusely abundant in a pond near Bell Busk. April. 



18S7, W. E. Collinge ! 



16. Nidderdale — Ripley Lake, 1887, F. R. Fitzgerald ! 



17. Wensleydale — Birk Rigg, in Semerdale, 1876, H. Crowther ! ditches 



and rivulets, Ripon, Rev. J. Dalton, Mag. N. H. and Nat., 1858, 

 p. 14; ; numerous but small, associated with Limiuca glabra in 

 ditch on west side ol railway, near Roecliffe, May 2Sth, 1885, 

 W.D.R. ! 

 i8a. Vale of Mowbray — Vale of Mowbray, Grainge, 'Vale of Mowbray,' 

 p. 38, 1859; 'ditch by roadside between Thirsk and Topcliffe, in 

 considerable abundance, J. Foggitt,' ]. H. Davies, Nat., p, 136, 

 1855. 



Trans. Y.N. U., 1890 (pub. i3gi). Series C 



