A HISTORY OF BERKSHIRE 



Wellington ; Streatley 

 Wellington 



Vitrea pura (Aid.) 



radiatula (Aid.). 



excavata (Bean). 



nltida (Mull.) 



fufaa (MQll.) 

 Anon ater (Linn.) 



hortenstS) FeV. 



circumscriptus, John. Near Oxford 

 Punctum pygmeeum (Drap.) 

 Pyramidula rupestris (Drap.). Sandford 



rotundata (Mall.) 



Helicella virgata (Da C.). Streatley ; Cum- 

 nor ; etc. 



itala (Linn.) 



caperata (Mont.) 



cantiana (Mont.) 

 Hygromia granulata (Aid.) 



hispida (Linn.) 



rufescens (Penn.) 

 Acanthinula aculeata (Mtill.) 



lamellata QefF.). Theale Lock, near 



Reading 



Vallonia pulckella (Mull.) 

 Helicigona lapicida (Linn.) 



arbustorum (Linn.) 

 Helix aspersa, Mull. 



nemora/is, Linn. 



hartensts, Mull. 

 Buliminus obscurus (Mttll.) 

 Cochlicopa lubrica (Moll.) 

 Ciecilianella adcula (Mtlll.) Streatley 

 Pupa secale, Drap. Unhill, near Streatley 



cylindracea (Da C.) 



muscorum (Linn.) 

 Sphyradium edentulum (Drap.) 

 Vertigo antivertigo (Drap.) 



pygm&tf (Drap.) 

 Eaka peruersa (Linn.) 

 Clausilia laminata (Mont.) 



bidentata (Strom.) 



rolphii, Gray. Newbury ; S. Hinksey ; 



Sulham 



Succinea putris (Linn.) 



elegans, Risso. Near Reading 



b. BASOMMATOPHORA 



Carychium minimum, Mttll. 

 Ancylus fluviatilh, Mtlll. 

 Velletia lacustris (Linn.) 

 Limntsa auricularia (Linn.) 



pereger (Mull.) 



palustris (Mtlll.) 



truncatula (Mtlll.) 



stagnalis (Linn.) 



glabra (Mtill.). Ditch near Kennington 

 Amphipeplea g/utinosa (Mtlll.). Near Reading 

 Planorbis corneus (Linn.) 



- albus, Mtlll. 



glaber, JefF. Wellington ; Bulmershe 



Park, near Reading 



nautileus (Linn.). Bulmershe Park, near 



Reading ; Chieveley 



- carinatus, Mtlll. 



marginals, Drap. 



vortex (Linn.) 



spirorbis, Mtlll. 



contortus (Linn.) 



fontanus (Lightf.). Wellington ; Bul- 



mershe Park, near Reading 

 Physa fontinalii (Linn.) 



hypnorum (Linn.). Near Reading, Ken- 



nington 



II. PROSOBRANCHIATA 



Bithynia tentaculata (Linn.) 



leachii (Shepp.). Near Reading 

 Vivipara vivipara (Linn.) 



contecta (Millett) 

 Valvata piscina/is (Mtlll.) 



- cristata, Mtlll. 

 Pomatias elegans (Mtlll.) 

 Neritina ftuviatilis (Linn.) 





B. PELECYPODA 



Dreissemia polymorpha (Pall.) 

 Unto pictorum (Linn.) 



tumidus, Retz. 

 Anodonta cygntea (Linn.) 

 Sphterium rivicola (Leach) 



corneum (Linn.) 



Sphisrium lacustre (Mull.). Near Reading 

 Pisidium amnicum (Milll.) 



puiillum (Gmel.). Near Reading 



nitidium, Jenyns. 



fontinale (Drap.) 



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