LAND AND FRESH WATER MOLLUSCA OF THE EAST RIDING 143 



Helix cantiana Mont. 



Common in all three divisions ; in South Holderness it is 



more abundant than nemoralis. 



Derwentland.— York district, common but local (S.W.N.) : hedgerows 

 near York (W.C.H.) ; very abundant, between York and Dunnington 

 common the whole way (R.M.C.). Allerthorpe (Y.N.U. 1893). 

 Lund, near Osgodby (Wm. Nelson, Taylor, Mon. I. 101). Newport 

 (W. Nelson J. of C. 5, pp. 262-267.). Wressle, bank (G.R.). 



Wolds.— Filey (Y.N.U. 1903). Bempton (J.S.G. ; J.S.G. J. of C, I. 

 p. 369; W.C.H. circular 62, and " Flamborough " p. 135). Flam- 

 borough Head, in great profusion on brambles (W.C.H. ; F.W.F, 

 circular 116). Bridlington (Y.N.U. 1886; Overton, J. of Malac. 8, 

 p. 53). Lowthorpe (L. B. Ross circular 84; Y.N.U. 1890). Sledmere 

 (Y.N.U. 1891). North Grimston, abundant (Y.N.U. 1902). Kildwick 

 Percy (Y.N.U. 1885 ; circular 106). Market Weighton (Y.N.U. 

 1888). Brough and Welton (J.D.H. circular 69; F.W.F. circular 

 157 ; Y.N.U. 1901). North Cave (T. P.). Bainton ; Rudston ; Lund 

 Wold; Kelleythorpe (E.P.B.). 



Holderness.— Driffield, banks of canal (L. B. Ross circular 145). 

 Beverley, Queensgate Road, abundant and fine (J.D.B. 3). Hornsea 

 (Leeds Conch Soc, Yorkshire Weeklv Post, July nth, 1903). Hull 

 district, common (J.D.B. 1). Hedon (W.C.H.; T.P., Trans. I., 

 p. 100). Paull: Cherry Cob Sands: Kilnsea; Aldborough, &c. (T.P.). 

 Cottingham (J.W.B.). Foston; N. Frodingham: Skipsea; Hornsea, 

 Driffield (E.P.B.). 



Var. rulescens Moq. : — Wressle, with type (G.R). 



Var. albida Taylor :— Allerthorpe, type not seen (Y.N.U. 1893). Dunning- 

 ton, a few (R.N.C). Hedon (T.P). 



Var. albocincta Ckll.:— Lund, near Osgodby (W. Nelson, Taylor, Mon. I., 

 p. 101). 



Helix rufescens Penn. 



This species is practically confined to the central division, 

 being common only in the Flamborough district. If, as 

 has been stated, it is approaching here its northern limit, 

 perhaps the fact that chalk is the most favourable ground 

 for mollusca generally influences its distribution. 

 Derwentland.— York district, common (S.W.N.) ; scarce (W.C.H.) ; 

 "very scarce near the city, never taken it myself" (R.M.C.). 

 Wressle, " appears to be rare, one specimen in 1884 " (G.R.). 

 Wolds Filey, cliffs (W.C.H. 2nd circular 1883 ; Y.N.U. 1903). Bemp- 

 ton (J.S.G.) ; common (W.C.H.). Flamborough, " abounds" 

 (W.C.H. circular 62 and "Flamborough," p. 135; F.W.F. circular 

 116). Speeton (T.P. circular 172). Danes Dyke (W.C.H. circular 

 62 ; Y.N.U. 1886). Bridlington (Rev. R. D. Maxwell, Nat. 4, 90). 

 Lowthorpe (L. B. Ross circular 84 ; Y.N.U, 1890). Driffield (T. W. 

 Bell, J. of C, 5, p. 221). Sledmere (Y.N.U. 1891). Brough and 

 Welton, in gardens (J.D.B. circular 69; F.W.F. circular 157). 

 Ferriby, Humber bank (J.D.B. circular 69). 



