Vol. XI. Part IV. MAECH 29th, 1915. Price 7s. 6d. net. 



PROCEEDINGS 



MALACOLOGlCALSOClllTY 



OF LONDON. 



EDITED BY 



E. A. SMITH, I.S.O., F.Z.S. 

 Under the direction of the Piihlication Committee. 



AUTHORS ALONE ARE RESPONSIBLE FOR THE STATEMENTS IN THEIR RESPECTIVE 



PAPERS. 



OOnSTTZBISTTS. 



Notes : — 



On the Extension of the Distri- 

 bution of the American 

 Slipper - Limpet (Crejndtila 

 fornicata) in the English 

 Coastal Waters. By J. H. 

 Orton, Sc.D 



Note on the Land and Fresh- 

 water Shells of Texel and 

 Terschelling. By F. H. 



Sikes, M.A.,F.L.S 



Papers : — 



The Geographical Distribution 

 of Purpura lapillus (L.). 

 By the Rev. A. H. Cooke, 

 M.A., Se.D., F.Z.S 



Descriptions of Colour Varieties 

 of Conus quercinus, Hwass, 

 and Cyjyrcsa lamarckii, Gray. 

 By H. O. N. Shaw, B.Sc, 

 F.Z.S 



LONDON : 



DULAU & CO., Ltd., 



37 SOHO Square, W. 



190 



191 



192 



210 



Papers conthmed : — page 

 On the Non-marine Mollusca 

 of a Post-Pliocene Deposit 

 at Apethorpe, Northampton- 

 shire. By A. S. Kennard, 

 F.G.S., and B. B. Wood- 

 ward, F.L.S., etc 211 



Descriptions of five new species 

 of Mollusca or the genera 

 Drillia, Marginella, Api- 

 calia, Plesiotrochus, and 

 Ringicula, all from Ceylon ; 

 also Notes on the genus 

 Plesiotrochus. By G. B. 

 SOWERBY, F.L.S. (Figs.)... 218 



On some Molluscan Remains 

 from the Opal Deposits 

 (Upper Cretaceous) of New 

 South Wales. By R. B. 

 Newton, F.G.S. (Plate VI, 

 Map, and Figs.) 217 



Molluscan Notes. By H. C. 

 Fulton 236 



Description of a supposed new 

 species of Placostyhts. By 

 H. C. Fulton. (Fig.) ... 242 



HE KLIN : 



R. FRIEDLANDER & SOHN, 



11 Karlstrasse, N.W. 



