LAND AND FRESH WATER MOLLUSCA OF THE EAST RIDING. I 33 



Agriolimax laevis Mull. 



"Wolds.— Filey, first ravine south (Y.N.U. 1903). Flamborough (F.W. F. 

 circular 116). Danes Dvke (Y.N.U. 1886). Kildwick Percy 

 (Y.N.U. 1885 ; circular 106). Drewton Dale (T.P.). 



Holderness. — Driffield, banks of canal (J.D.B. circular 145). Beverley 

 district, in moist places ; generally distributed, but not numerous ; 

 Leckonfield, Meaux, Risby, and banks of R. Hull (J.D.B. 3). 

 Hornsea (Leeds Conch. Soc, Yorkshire Weekly Post, July nth, 

 1903). Generally distributed in damp woods and marshy places 

 throughout Holderness ; Bale Wood, Aldborough ; Roos Bog ; 

 Hedon ; Humbleton (T.P.). 



Testacella haliotidea Drap. 



This and the following species are obvious introductions. 



Holderness.— Beverley, Swailes' Nursery Gardens (J.D.B. Nat. vol. S, 

 p. 185 ; J. of C. vol. 4, p. 67). 



Testacella scutulum Sbv. 

 Wolds.— Woodleigh, Hessle, F. Mason (Webb, J. of Malac. vol. 6, p. 26). 



Vitrina pellucida (Mull.). 



This species is most active in the winter months. A 

 search then would probably show that it is as common in 

 Derwentland and the Wolds as in Holderness. 



Derwentland. — York district (S.W.N.) ; very general, but not abun- 

 dant (R.M.C.). 



Wolds. — Howsham Woods (Y.N.U. 1889). North Grimston, a few 

 (Y.N.U. 1902). Sledmere (W.D.R. circular 93; Y.N.U. 1891). 

 Lowthorpe (Y.N.U. 1890). Filev ( W.C.H. 2nd circular 1883; 

 Y.N.U. 1883; Y.N.U. 1903). Brough and Welton (Goole Sc. 

 Soc, Nat. 2, p. 179; J.D.B. circular 69; F.W.F. circular 157; 

 Y.N.U. 1901). Drewton Dale (T.P.). 



Holderness. — Driffield (L.B. Ross circular 145) ; all over, some of them 

 uncommonly beautiful (E. P. B,). Beverley district, abundant if 

 sought for early in spring ; Westwood ; plantations near Rowley, 

 and Meaux (J.D.B. 3). Meaux, long plantation (J.D.B., J. of C. 3, 

 p. 332). Hornsea, in woods near the Mere (J.D.B. 2). Spurn (5th 

 circular 1884; Y.N.U. 1884). Hull district, generally distributed 

 (J.D.B. 1). Abundant in Holderness in plantations and thorn 

 fences, especially during the winter ; it may be found crawlinsj on 

 the under side of branches in stickheaps when the upper side is 

 coated with ice; Hedon, abundant Dec. 24, 1902; Thearne, Jan. 1, 

 1904 (keen frost) ; Tansterne, Lellev, Humbleton, Aldborough, Jan. 

 5, 1904 (T.P.). Cottingham (J.W.B.). 



Hyalinia lucida (Drap.). 



Wolds.— Tibthorpe (E.P.B.) ; identification confirmed by Mr. J. W. 

 Taylor. 



