PROCEEDINGS : MARCH lO, I92O. I23 



'■'■ Helicellavirgata (Da Costa) destroyed by Moles," by A. K. Lawson. 



*' On the Systematic Position of Conns marchionalus Hinds," by A. T. Hopwood. 



" On the occurrence of Physa gyrina Say in Great Britain," by J. Davy Dean. 



Principal Exhibits. 



By Mr. R. Standen : Series of Cvprcca stolida L. , type and vars. moniontha 

 Melv., £e/asi//ta Melv. , diauges Melv. , and C. erythnreiisis (Gray), from Aden; 

 Paltidina hungarica, males and females, from Budapest (ex coll. Hazay). 



By Mr. A. K. Lawson : Specimens and photos to illustrate his three papers. 



By Mr. A. T. Hopwood : Specimens to*illustrate his paper. 



By Mr. J. Davy Dean : Physa gyrina Say, from Cardifif ; Ph. heterostropha Say, 

 from Cardiff and other British localities ; Ph. gabbi Tryon, from California, to 

 illustrate his paper. 



By Mr. G. C. Spence : Co-types of Opeas btirnupi Conn., from Natal. 



In the Special Exhibit A?npelila, series were shown by several members and by 

 the Manchester Museum. 



490th Meeting, held at the Manchester Museum, March loth, 1920. 

 Mr. R. Standen in the chair. 



New Members Elected. 

 John William Hainsworth. William Mortimore Cross. 



Candidate Proposed for Membership. 

 Harold C. Winck worth, Major, R.A.M.C, 37, Upper Rock Gardens, Brighton 

 (introduced by Ronald Winckworth and Edward Collier). 



Paper Read. 



" Pyramidula rotnndatav&r. alba'A.i Brislington, Somerset N. ," by D. Bacchus. 



Principal Exhibits. 



By Mr. A. K. Lawson : Shells from "Kitchen-Middens," at Tentsmuir, N.E. 

 Fife. 



By Mr. A. T. Hopwood : Conus virgo (4*4 inches) with operculum and 

 periostracum ; Conus betulinus, and others (ex coll. Alderson). 



By Mr. W. H. Davies : Curious growths of Helix aspersa within the apertures 

 of Limncea stagnalis. 



In the Special Exhibit of " Abnormal Shells," many interesting and curious 

 examples were shown. 



491st Meeting, held at the Manchester Museum, April 14th, 1920. 

 Mr. R. Standen in the chair. 



New Member Elected. 

 Major Harold C. Winckworth. 



Paper Read. 

 " Note on the Variation of Clausilia itala Martens," by W. E. Alkins. 



Principal Exhibits. 

 By Mr. W. H. Davies : Clausilia bidentata var. tuinidula, from Tarleton. 

 By Mr. J. Ray Hardy : Subscalariform specimen of Planorbis albas, from 

 Wilmslow, Cheshire. 



By Mr. A. T. Hopwood : Central American Conns, including a fine Conns 

 proteus Brug. 



A Special Exhibit of Achatinella was held. 



