By the Rev. J. E. Vize. 281 



L. stagnalis, {De Montford) Trowbridge, Devizes, Salisbury. 

 L. paluatris, [Draparnaud) North Bradley, Trowbridge, Salisbury, Devizes. 

 L. truncatula {Jeffreys) numerous in a ditch at Corsham, at the end of Lord 

 Mothuen's park, Salisbury, Devizes, Hungerford. 

 L. glutinosa, [Draparnaud) Salisbury. 

 Ancylus fluviatilis {Mtiller) Canal reservoirs at Devizes, Salisbury. 



A. lacustris {Mullery VeUetia lacustris of Gray) ponds near Lavington, Salis- 

 bury. 



FAMILY CYCLOSTOMACEA. 

 Cyclostoma elegans {Draparnaud) Roundway Hill, Devizes, Salisbury 

 Acme lineata, {Uartmann, Acicula f usca in Gray) on roots of grass at Upavon. 



FAMILY PERISTOMATA. 

 Bythinia tentaculata, ( Gray) abundant in the Kermet & Avon Canal in winter 

 and summer, Salisbury, Devizes. 



B. Lcachii, {Moq.-landon, B ventricosa in Gray) Salisbury, Devizes. 

 Paludina vivipara, {Say.) so very abundant at certain seasons, that they can 



be collected in great numbers fi-om the Kennet & Avon Canal at Trowbridge, 

 Canal at Heybrook and Devizes. 



Valvata piscinalis, {Ferrussac) Trowbridge, Salisbury, Canal reservoirs 

 Devizes. 



V. cristata, {Muller) Canal at Trowbridge, Salisbury. 



FAMILY. NERITACEA. 

 Neritina fluviatilis, {Lamarck) on stones in the Canal at Trowbridge, Salis- 

 bury. 



FAMILY. MYTILACEA. 

 Dreissena polymorpha, ( Van Beneden) very abundant at Trowbridge in the 

 Canal, Canal and reservoii's at Devizes. 



FAMILY. NAIADES. 

 Anodonta cygnea, {Draparnaud) numerous in the Canal at Trowbridge, Canal 

 Devizes, the moat at Britford, Longleat. 



Unio tumidus, {Philippson) Canal at Devizes. 



Unio pictorum, {Ditto) Heybrook, Canal and reservoirs at Devizes. 



FAMILY. CARDIACEA. 



Pisidium amnicum, {Jenyns) Canal at Trowbridge, Milford near Salisbury^ 

 Canal at Devizes. 



P. obtusale, {Pfeiffer) Milford, Salisbury. 



P. pusillum, {Jenyns) North Bradley, Harnham meadows, Salisbury. 



P. Cascrtanum {Bourguignat, P. cinereum, Gray) North Bradley, and one or 

 two other localities near Trowbridge. 



P. pulchellum, {Jenyns) Milford near Salisbury, Drew's Pond, Devizes. 



P. Hcnslowianum, {Jenyns) habitats same as preceding. 



Cyclas rivicola {Leach) frequently to be found at certain seasons in canal 

 at Trowbridge, Milford near Salisbury, canal at Devizes. 



C. cornea {Draparnaud) Canal at Trowbridge, Salisbury, Devizes. 

 C. lacustris, {FSrmsac) Salisbury, Drew's Pond, Devizes. 



