192 PROCEEDINGS COTTESWOLD CLUB 191 1 



S. lacustre (Miiller). [Cyclas caliculata]. Pond in Bristol 

 Road near Gloucester ; Fisher's Mill pond, Barton St. Mary 

 (Jones). Canal, Chalford. 



S. pallidum, Gray. Canal, Sharpness — rare. 



Pisidium obtusale, Pfeiffer. Near the Wilderness, Mitchel- 

 dean (Jones). 



P. pusillum (Gmelin). Common in most ponds, ditches 

 and canals. 



P. pulchellum, Jenyns. Streams and canals and clear 

 ponds — Common (Jones). 



P. subtruncatum, Malm. East and West Gloucestershire 

 (" Journal of Conchology "). 



P. amnicum (Miiller). Canals and streams — Generally 

 distributed. 



