PROCEEDINGS 



OF THE 



MALACOLOGICAL SOCIETY OF LONDON 



ORDINARY MEETING. 

 Friday, 14th November, 1919. 

 G. K. Gttde, F.Z.S., President, in the Chair. 

 Mr. Ronald Winkwortb, F.R.G.S., was elected to membersliip of 

 the Society. 



The following communications were read : — 



1 . " Studies in British Hydrobiidse, Part I." By G. C. Robson,B.A. 



[Abstract.] 



The author detailed certain experiments carried out with specimens 

 of Paludestrina jenkinsi, with the object of analysing the reaction 

 to light exhibited by this mollusc when kept in captivity. 



The results obtained were not very positive, but it appeared that 

 in a considerable number of cases the mollusc moved towards 

 darkened areas and away from the light, although it was doubtful 

 if this tendency constituted true phototaxis, and the question 

 required further study. 



2. " Description of a new sub-species of Papuina tayloriana 

 Ad. & Eve." By H. C. Fulton. 



3. " Additions to a List of recent Middlesex MoUusca." By 

 J. Fj. Cooper. 



Mr. T. iredale exhibited an interesting collection of Marine Shells 

 recently received from Twofold Bay, New South Wales. 



Mr. J. Wintle, F.Z.S., exhibited Dr. Gwyn Jeffreys' annotated 

 copy of his original Ust of British non-marine MoUusca, published 

 in the Transactions of the Linnean Society, vol. xvi, pt. 2, 1830 

 (29th May, fide Dr. Dall), and pt. 3, 1833. 



ORDINARY MEETING. 

 Friday, 12th December, 1919,. 

 G. K. GuDB, F.Z.S., President, in the Chair. 

 Dr. S. Stillman Berry and Mr. Herbert E. J, Biggs were elected 

 to membership of the Society. 



The following communications were read : — 



1. "On the Abnormality of Structure in the Radula of certain 

 Rhachiglossate MoUusca." By the Rev. A. H. Cooke, Sc.D. 



2. " On the Affinities of Pyramidida, Acanthimda, and Vallonia." 

 By Hugh Watson. 



VOL. XIV.— APBIL, 1920. 1 



