277 



PROCEEDINGS OF THE 

 CONCHOLOGICAL SOCIETY OF GREAT BRITAIN & IRELAND. 



404th Meeting, held at Manchester Museum, Sept. 13th, 1911. 



Mr. J. W. Taylor in the chair. 



Additions to the Library announced and thanks voted : 



" A New Species of Unio from the Yorkshire Estuarine Series ; with Notes on 

 other Forms," by J. Wilfrid Jackson. "The West American Mollusks of the Genus 

 Nodiilus" by P. Bartsch. "Fauna of the Gatun Formation, Isthmus of Panama," 

 by A. P. Brown and H. A. Pilsbry. " A New Ecphora of the Chesapeake Mio- 

 cene "; " Manual of Conchology," part 83, by H. A. Pilsbry {from the respective 

 authors). " Noticias sobre algunos Moluscos de Espafia" ; " El Museo del Insti- 

 tuto Oceanografico de Monaco"; " Moluscos de la Guinea Espanola," by J. Gon- 

 zalez Hidalgo (per Mr. J. W. Taylor) ; and the usual periodicals received in 

 exchange). 



New Member Elected. 



Mrs. Susan A. Hitchon, Rhyddington, Oswaldtwistle, Lancashire. 



Papers Read. 



"Pseudaitodoniarolhomageiisis I.oc. in Britain, "by W. H. Foxall and H. Overton. 



" On the Occurrence of Claiisilia dtibia Drap. in Kent," by H. Overton. 



" Clausilia bideiitata monst. dextrorsmn at Skipton," by C. Theodore Cribb. 



" Notes of certain Terrestrial and Fluviatile MoUusca from Glengariff, County 

 Cork," by Siaff-Surgeon K. H. Jones, M.B., F.G.S., K.N. 



" Note on a Colour Mutation in Hyalinia helvetica," by Chas. Oldham. 



" Vertigo angitstior in Hertfordshire," by Chas. Oldham. 



" Vilrina hibernica Taylor and Jeffreys' Varieties of Vitriiia pelliicida Miill.," 

 by Lionel E. Adams, B. A. 



" Testacella in Staffordshire," by J. R. B. Masetield, M.A. 



Exhibits. 



By Mr. J. Davy Dean : Heiicella cespitiuii from Mentone ; Pupa (^Torquilla) 

 cinerea from Mentone (one example being abnormally long) ; Heiicella itala from 

 Kendal Fell ; Hygromia riifescens, peculiarly distorted, from Warton Crag ; also 

 Plettrodonte strangitlata from Jamaica. 



By Mr. C. T. Cribb : Clausilia bidcntata and m. dextrorsiun from Skipton, to 

 illustrate his note. 



By Mr. H. Overton : Specimens of supposed Clausilia diibia Drap. from Dover, 

 and Pseudanodonta rotliomagensis Loc. from River Teme, to illustrate his notes. 



By Capt. W. J. Farrer : Alargaritana viargaritifera from Rivers Irt, Greta, 

 and Derwent, Cumberland, including a curiously twisted specimen from the Irt. 



By Mr. Chas. Oldham : A series of Herts. Mollusca, to illustrate his note. 



By Mr. J. W. Baldwin : A fine series of marine shells from Soulhport, collected 

 during July of the present year. 



By Mr. C. \\. Moore : A series of photographs of Helix pisaiia in situ in its 

 natural habitat at Tenby. 



By Rev. L. Shackleford : A fine specimen of Conns papilioitaceus Hwass from 

 the Gulf of Guinea, a species closely allied to and often confused with C. frome- 

 theus Brug. The specimen agrees well with the figure in the " Conchologia 

 Iconica," but is larger ; Voliita piperatii Sow. var. macgillivrayi Cox, and I'oliita 



