A HISTORY OF WORCESTERSHIRE Helicigona lapicida (Linn.) — arbustorum (Linn.) Helix aspersa, Mali. — nemoralis, Linn. — hortensis, MqII. Buliminus obscurus (Mull.) CochUcopa lubrica (Miill.) Azeca tridens (Pult.). Near Worcester ; Mal- vern district; Acock's Green; Dud- ley CacUianelk acicula (Mull.) Pupa secale, Drap. Malvern — cylindracea (Da C.) — muscorum (Linn.) Sphyradium edentulum (Drap.). Malvern ; Acock's Green Vertigo antivertigo (Drap.). Malvern district — pygmaa (Drap.). Malvern district ; Selly Oak Balea perversa (Linn.). Malvern district Clausilia laminata (Mont.) — bidentata (Strom.) Succinea putris (Linn.) — ekgam, Risso. Stourport ; Acock's Green b. Basommatophora Carychium minimum, Mull. Malvern ; near Worcester Ancylus Jiuviatilis, Mull. VeUetia lacustris (Linn.) Limncea auricularia (Linn.) — pereger (Mali.) Limnaa palustris (MUll.) — truncatula (MUll.) — stagnalis ^Linn.) — glabra (Mall.). Hartlebury Common Planorhis corneus (Linn.) — albm, Mull. — glaher, Jeff. Malvern. — nautileus (Linn.) — carinatus, Mull. — marginatus, Drap. — vortex (Linn.) — spirorbis, Mall. — contortus (Linn.) — fontanus (Lightf.) — Uneatus (Walker). Stinton Pool, Cross- way Green ; Malvern Physa fontinalis (Linn.) — hypnorum (Linn.) IL PROSOBRANCHIATA Bitbynia tentaculata (Linn.) — leachii (Shepp.). Malvern Vivipara vivipara (Linn.) — contecta (Millett). River Severn ; Wor- cester and Birmingham Canal Valvata piscinalis (MulL). Malvern ; River Severn — cristata. Mull. Near Worcester Pomatias elegam (Mull.). Malvern ; Bewdley Neritina fuviatilis (Linn.). Malvern ; River Severn B. PELECYPODA Dreissensia polymorpha (Pall.). River Severn ; Worcester and Birmingham Canal Vnio pictorum (Linn.). River Teme (very abundant at Powick) ; near Worcester ; River Avon ; Worcester and Birming- ham Canal — timidus, Retz. Anodonta cygnaa (Linn.) Spharium rivicola (Leach). Malvern — corneum (Linn.) Spharium ovale (F6r.) — lacmtre (MuU.) Pisidium amnicum (Mall.) — pusillum (Gmel.). Malvern ; near Wor- cester — nitidum, Jenyns — fontinale (Drap.). Near Worcester ; Mose- ley. [The variety Hemlowianum has been found at Hall Green and near Worcester.] 82
