79§ FAUNA AND FLORA OF NORFOLK : NON-MARINE MOLLUSCA. 
J. muscorum, var. edentula, Clessin. 
E. Roydon Fen (A.M.). 
,, var. bigranata, Rossm. 
W. Thetford St. Peter (A.M.). 
The tridentate form occurs at 
W. Thetford St. Peter (A.M.). 
Vertigo antivertigo (Drap.). In Marshes. 
E. Old Lakenham (S. P. Woodward), Plentiful on 
Roydon Fen, Flordon Common (A.M.). 
W. Castle Rising (“Victoria” County History). 
V. substriata (Jeffreys). Among dead leaves and moss. 
E. Near Diss (A.M.). 
W. Bawsey (T.P.), Garboldisham (L. E. Adams). 
V. pygm.ea (Drap). In grass, moss, and dead leaves. Fairly 
common. 
E. Yelverton Churchyard (S.S.P.), Earlham, 
Costessey, Ringland, Roydon Fen, Flordon 
Common (A.M.), 
W. Middleton, Ringstead, Castle Rising (T.P.). 
,, var. quadridentata, Studer. 
E. Roydon Fen (A.M.). 
W. Abundant on dead stems, Gayton Road 
Station (T.P.). 
V. moulinsiana (Dupuy). On fens and swampy ground. 
Very rare. 
E. Roydon Fen (A.M.). 
V. pusilla, Muller. Under dead leaves. 
E. Earlham, Bowthorpe, Bramerton (A.M.). 
W. Bio Norton (A.M.), Garboldisham (L. E. 
Adams). 
V. angustior, Jeffreys. In marshy places. Rare. 
E. Rather plentiful on Roydon Fen, Flordon 
Common (A.M.). 
|s W. Hunstanton (A. S. Kennard). 
Bale a perversa (Linne). Under ivy on old walls, and on 
the bark of old trees. Not common. 
E. Thorpe (Bridgman). 
W. Bio Norton (A.M.). 
