Acroloxidae
Acroloxus lacustris (Linne)
Bivalves
Unionidae
Unio pictorum (Linne)
Unio cf. tumidus Phillipson
Anodonta anatina (Linne)
Anodonta cf. cygnea (Linne)
Sphaeriidae
Sphaerium corneum (Linne)
Musculium lacustre (Muller)
Pisidium amnicum (Linne)
Pisidium henslowanum (Sheppard)
Pisidium subtruncatum Malm
Pisidium milium Held
Dreissenidae
Dreissena polymorpha (Pallas)
Terrestrial Gastropods
Helicidae
Helix aspersa (Muller)
Cepaea hortensis (Muller)
Arianta arbustorum (Linne)
Trichia striolata (Pfeiffer)
Monacha cantiana (Montagu)
Clausiliidae
Clausilia sp.
Cochlicopidae
Cochlicopa lubrica (Muller)
Succineidae
Oxyloma pfeifferi (Rosmassler)
Discidae
Discus rotundatus (Muller)
Valloniidae
Vallonia pulchella (Muller)
Zonitidae
Oxychilus sp.
Essex Field Club Newsletter No. 60, September 2009
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