LAND AND FRESH WATER MOLLUSCA OF THE EAST RIDING. I 53 



Var. albida Taylor :— Beverley, Pighill Lane, 3 specimens (J.D.B. 3; 

 J.D.B. J. of C. 3, p. 240 ; J. W. Taylor, J. of C. 4, pp. 28, &c). 



Var. virescens Morel. : — -Wressle, Succinea virescens, one specimen 

 identified by T. D. A. Cockerell (G.R.) : 5. vitrea (T. D. A. 

 Cockerell, Nat. World, 4, p. 43) ; S. vitrea (Jeff), with figures 

 (T. D. A. Cockerell, Ann. and Mag. Nat. Hist. ser. 5, vol. 19, 

 P- '75)- 



Carychium minimum (Mull.). 



Derwentland. — Very common about York (W.C.H.) ; "swarms" 

 (R.M.C.). Snake Hall (T.P.). 



Wolds.— Filev, cliffs (W.C.H. 2nd circular, 1883). Speeton (J.S.G). 

 Flamborough (F.W.F. circular 116). Danes Dvke (Y.N.U. 1886). 

 Lowthorpe (Y.N.U. 1S90). Sledmere (Y.N.'U. 1891). North 

 Grimston, not uncommon (Y.N.U. 1902). Kildwick Percy (Y.N.U. 

 1885 ; circular 106). Abundant, Westwood, Risby, Molescroft, &c. 

 (J.D.B. 3). Very abundant at Skidby (J.D.B. 1 ). Risby (Beverley 

 F.N. and Sc. Soc. Nat. 7. p. 170). Brough and Welton (J.D.B. 

 circular 69; F.W.F. circular 157; Y.N.U. 1901). South Cave; 

 Drewton Dale (T. P. ). In plenty at Flamborough Head and Sled- 

 mere (E.P.B.). 



Holderness. — Driffield (L. B. Ross, J. of C. 4, p. 356) ; banks of canal 

 (L. B. Ross, circular 145). Cottingham ; banks of R. Hull (J.D.B. 3). 

 Hull district, common in suitable localities (J.D.B. 1). Hornsea, 

 woods near the Mere, common (J.D.B. 2). Withernsea (F.W.F. 

 circular 99). Common in plantations, among moss, and under 

 stones by the roadside ; Hedon ; Mappleton ; Roos ; Aldborough ; 

 Cherry Cob Sands, &c. (T.P.). Wansford Road (E.P.B.). 



Segmentina nitida (Mull.). 



This local species is found in one locality in Holderness : 

 it has not been discovered in the lacustrine deposits. 



Derwentland. — " The Bootham Observer states that in 1855 it was found 

 in ponds on Tilmire . . . but I have met with it nowhere except 

 atAskham." (R.M.C.). 



Holderness.— Hornsea Mere (Y.N.U. 1S81 ; W.D.R. J. of C. 4, p. 13 ; 

 F.W.F. Fretwell's Guide and circular 150 ; T.P. Trans. I. p. 103). 

 This species seems to prefer the shelter of the reeds, and may best be 

 found along the first plantation on the Seaton Road or near the 

 snipe ground on the south. 



Planorbis fontanus (Lightfoot). 



Occurs sparingly in a few localities in Holderness and the 

 neighbouring parts of the Wolds. 



Derwentland. — York district, very local (S.W.N.) ; sparingly distributed 

 (R.M.C.). No East Riding localities are given near York ; not 

 recorded for the Wressle and Howden districts. 



M 



