LAND AND FRESH WATER MOLLUSCA OF THE EAST RIDING. 1 37 



Helix rotundata Mull. 



A common species in plantations and hedgerows in all 

 parts of the Riding. 



Derwentland. — Common everywhere (W.C.H). York District, common 

 (S.W.N.); everywhere(R.M.C). Allerthorpe(Y.N.U.i893). Wressle, 

 frequent (G.R. ). 



Wolds.— Howsham Woods (Y.N.U. 1889). Kildwick Percy (Y.N.U. 

 1885; circular 106). North Grimston, common (Y.N.U. 1902). 

 Sledmere (Y.N.U. 189O. Filev plantation (W.C.H. 2nd circular, 

 1883). Hessle; Skidbv ; Risby (J.D.B. 1). Ferriby, Humber bank 

 (J.D.B. circular 69). Brough (F.W.F. circular 157 ; Y.N.U. 1901). 

 Hessle (J.D.B. in Taylor Mo-i. 1, p. 281. Fairly general but not in 

 lar°:e numbers ; Scarborough Road ; Covvlam ; Sledmere ; Bainton ; 

 (E.P.B.). 



Holderness. — Beverley district, Harland Rise ; Risby ; Cherry Tree 

 Lane ; Molescroft ; plantation near Long Lane ; locally abundant 

 (J.D.B. 3). Drift, Beverley Beck (J.D.B. 3). Withernsea 

 (F.W.F. circular 99). Abundant in hedgerows and plantations in 

 Holderness ; Hedon ; Burstwick ; Boreas Hill ; Enholmes ; Bale 

 Wood ; Aldborough ; Humbleton ; Hornsea, woods north of Mere, 

 &c. (T.P.). Wansford Road, Driffield (E.P.B.). 



Yar. turtoni Flem. : - York district, a few examples (S.W.N.) ; fairly 

 common (R.M.C.). 



Var. alba Moq. : -Howsham Woods (Y. N. U. 1 889). Hessle ( J. D. B. 1 ) ; 

 five specimens (J.D.B. Nat. 4, p. 25). 



Helix pygmaea Drap. 



Wolds.— Sledmere (Y.N.U. 1891). South Cave (F.W.F. circular m). 

 Brough (F.W.F. circular 157). Ferriby, on the Humber bank, at 

 roots of furze (J.D.B. circular 69). Beverley Westwood, scarce 

 (J.D.B. 3). Driffield (L. B. Ross, J. of C. 4, p. 356). Welton 

 Dale ; Drewton Dale (T.P.). 



Holderness. — Hornsea, woods north of mere ; Spurn (T. P. Trans. I. 99). 

 Generally distributed in Holderness, but never abundant ; most 

 easily found in the winter ; Roos Bog ; Preston, on hedge clippings 

 on the Lelley Road ; spinney on roadside, Lelley ; spinney north of 

 the railwav, Twyers; Hedon ; Kelsey Hill ; Humbleton (T.P.). 



[Helix lamellata Jeff. 



Not recorded for the East Riding. It occurs sparingly 

 among Luzula at Raincliff Woods and Hackness, a few miles 

 beyond the Riding boundary, and abundantly among Luzula 

 at Hayburn Wyke and among beech leaves in Mulgrave 

 Woods (F.W.F. and T.P. Sept. 1894).] 



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