A HISTORY OF NORFOLK CochlUopa lubrica (MuU.) Caciitanella acicula (Mull.) Pupa cylindracea (Da C.) — muscorum (Linn.) Sphyradium edentulum (Drap.). wood at Costessey Vertigo antivfrtigo {Drap.). Rare: Castle Rising — substriata (JefF.). Bawsey, near Diss — pygrneea (Drap.) — pusil/a, Mull. Earlham and Bowthorpe near Norwich Ba/ea perversa (Linn.). Thorpe near Norwich Clausilia laminata (Mont.). Costessey ; Fram- lingham (one specimen) — bidentata (Strom.) Succinea putris (Linn.) — elegans, Risso Amphipeplea glutinosa (Mull.). Norwich Planorbis corneus (Linn.) — albus. Mall. — glaber, JefF. River at Heigham Rare : in a — nautileus (Linn.). Local — carinatus, MuU By railway bridge Norwich b. Basommatophora Carych'tum minimum, Mull. Leuconia bidentata (Mont.) over Ouse, Lynn Ancylus fluviatilis (Mull). Velletia lacustris (Linn.) Limnaa auricularia (Linn.) — pereger (Mull.) — palustris (Mali.) — truncatula (Mall.) — stagnalis (Linn.) — glabra (Mall.). Reffley, North Runcton near Lynn — marginatusy Drap. — vortex (Linn.) — spirorbis, MUU. — contortus (Linn.) — fontanus (Lightf.) — iineatus (Walker). Lynn, Thorpe Physa fontinalis (Linn.) — hypnorum (Linn.). Local : Whitlingham, Rare : Thorpe, St. Germans, Yarmouth n. prosobranchiata Paludestrina ventro$a (Mont.). Breydon — stagnalis (Bast.). Breydon, Wells Bithynia tentaculata (Linn.) — leachii (Shepp.) Vivipara vivipara (Linn.) — contecta (Millett) Valvata piscinalis (MuU.) — cristata. Mall. Pomatias elegans (MUll.). Whitlingham Wood, Drayton near Norwich Acicula lineata (Drap.). Very rare : Caistor Wood Neritina Jluviatilis (Linn.) Dreissensia polymorpha (Pall.). Unio pictorum (Linn.) Anodonta cygnaa (Linn.) Spharium comeum (Linn.) — lacustre (MuU.) Pisidium amnicum (MuU.) B. PELECYPODA Breydon Pisidium pusillum (Gmel.) — nitidum, Jenyns. Rare : near Thetford — fontinale (Drap.). Common. The var. henslowiana has been taken at Lynn — milium (Held.). Rare : West Winch, St. Germans, Old Lakenham near Norwich 88
