OLDHAM : I'ISIDIUM PARVULUM IN THE GREAT OUSE. 159 



and the stations already known for it in the river systems of the 

 Thames and Shannon suggest that it has a wide range in Britain, and 

 that it has only been overlooked so long because of its minute pro- 

 portions, for it is a very distinct and well marked form. 



PROCEEDINGS OF THE 

 CONCHOLOGICAL SOCIETY OF GREAT BRITAIN & IRELAND. 



494th Meeting, held at the. Manchester Museum, September 8th, 1920. 

 Mr. R. Standen in the chair. 



New Members Elected. 



Colonel Frederick Sprate Bowring. Ellis Crapper. 



Candidates Proposed for Membership. 



Richard Bulley, 10, Stratford Square, Nottingham (introduced by W. Gyngell 



and E. R. Brown). 



o 

 Berthold Snndler, Boras, Sweden (introduced by Hans Schlesch and J. H. 



Matthews). 



C. A. Stepney Barnacle, Ruanwella Estate, Ceylon (introduced by Rev. Dr. 

 A. H. Cooke and R. Standen). 



Norman William Sier, 2, Willow Lane, Norwich (introduced by A. Mayfield 

 and R. Standen). 



Papers Read. 



" Land and Freshwater MoUusca of Winsley, North Wilts.," by D. Bacchus. 

 " Valvata macrostoina Sfeenbuch in West Suffolk," by C. Oldham. 

 " Pisidiiim parviiluvi Clessin in Cheshire," by C. Oldham. 

 "Variation of Ena obscura (Miiller)," by W. E. Alkins. 



Principal Exhibits. 



By Mr. C. Oldham : — Large Limax niaxijnus (alive) from a beech wood, 

 Streatley, Berks. ; Valvata maci-ostoma, Brandon, Suffolk W. ; Pisiditim par- 

 viilitm and P. supinuvi from canal, Beeston Castle, Cheshire ; Pisidiiim supimivi 

 and P. amniaiDi from River Dee, Eccleston Ferry ; Lifiinaa pereger var. lacustiis 

 and Ancylus fluvialilis, Coniston Water, Lake Lancashire ; Margaritana inar- 

 garitifer. River Irt, Holmrook. 



By Mr. A. K. Lawson : — Margaritana margaritifer from River Tay, Perth, 

 with pearls and photographs of habitat. 



By Mr. E. Crapper : — Exceptionally fine pearl-mussel and pearls from River 

 Tay, Perth. 



By Mr. L. E. Adams : — Large Planorbis corneas from Reigate. 



By Mr. J. H. Matthews : — Large Planorbis corneus from Sale ; Volufopsis 

 norvegicus from 95 fathoms. Cape Langanaes, Iceland ; Saxicava arctica (from 

 sponges) and Crenella hcvigata (from cod), 100 fathoms. North Cape, Iceland. 



By Mr. R. Standen : — Shell and egg of Ennea {Uniplicaria) inicrodon from 

 Mayotte. 



By Mr. G. C. Spence : — Plicaxis >nirabilis (Sykes) from Kelantan. 



By Mr. A. T. Hopwood : — Helix aspersa var. exalbida from St. Lawrence, 

 Thanet. 



By Mrs. Gill : — Cypirca aurantia and C. thersites. 



By Mr. E. R. Brown : — Unusual Cyprica ziczac ; fine C. erythricensis. 



