LAND AND FRESH WATER MOLLUSCA OF THE EAST RIDING. 151 



Clausilia laminata (Mont.). 



Found only in the central division, and more local than 

 perversa. 



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

 (Y.N.U. 1902). Kildwick Percy (Y.N.U. 1885 ; circular 106). 

 Sledmere (W.D.R. circular 93; Y.N.U. 1891). Skidby (f.D.B. 1). 

 Rowley and Harland Rise (J.D.B. 3). South Cave (F.W.F. circular 

 1 11). Brough and Welton Dale (Goole Sc. Soc. Nat. 2, p. 179 ; 3rd 

 circular 1878; Y.N.U. 1878; J.D.B. circular 69; Y.N.U. 1887; 

 F.W.F. circular 157; Y.N.U. 1901). Drewton Dale (T.P). Between 

 Cottingham and Skidby (J.W.B.). Croom ; Sledmere ; York Dale 

 (E.P.B.). 



Var. tumidula : — Sledmere (W.D.R. circular 93). 



Var. albino. Moq. :— Welton Dale (Y.N.U. 1887). 



[Azeca tridens (Pult.). 



Is included in the Census. No published records have 

 been found] . 



OocMicopa lubrica (Mull.). 



Derwentland. — York district, common (S.W.N.) abundant everywhere 

 (R.M.C.). Allerthorpe (Y.N.U. 1893). 



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

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

 Sledmere (Y.N.U. 1891). Filey, cliff (W.C.H. 2nd circular 1883 ; 

 Y.N.U. 1883: Y.N.U. 1903). Speeton (J.S.G). Flamborough 

 (F.W.F. circular 116). Danes Dyke (Y.N.U. 1886). Harland Rise ; 

 Westwood; Risby; Molescroft (J.D.B. 3). Brough and Welton Dale 

 (Goole Sc. Soc, Nat. 2, p. 179 ; J.D.B. circular 69 ; F.W.F. circular 

 157). Brantinghamthorpe (Y.N.U. 1901). Everywhere, in isolated 

 specimens (E.P. B.). 



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

 Beverley Beck ; Cherry Tree Lane ; Meaux (J.D.B. 3). Hornsea, 

 woods near the Mere (J.D.B. 2). Withernsea (F.W.F. circular 99). 

 Spurn (Y.N.U. 1884). Hull district, common (J.D.B. 1). Common 

 (T.P). 



Var. lubricoides Fer. : — Harland Rise (J.D.B. 3). 



Subfossil, in blue clay, below the shell marl : — Bridlington, one speci- 

 men (W.C.H. Nat. 12, p. 374). 



Csecilioides acicula (Mull.). 



Not in the Census ; probably common on the chalk and 

 gravels. 



Derwentland.— Fulford, gravel pits, dead (H. Richardson in R.M.C.). 



