264 PROCEEDINGS OF THE 5IALACOLOGICAL SOCIETY. 



ORDINARY MEETING. 



Friday, 10th May, 1901. 



E. A. Smith, F.Z.S., etc., President, in the Chair. 



Miss E. P. F. Bury was elected to membership of the Society. 



The following communications were read : — 



1. " Note on the occurrence of Planorhis Stroemii, Westerl., in the 

 TTolocene Deposits of the Thames Valley and its possible identity 

 with P. Draparnaudi." By A. S. Kennard and B. B. Woodward, 

 F.L.S., etc. 



2. " List of the known forms of Volutidae from South Africa, with 

 a description of a new species of Voluta from Natal." By E. A. 

 Smith, F.Z.S., etc. 



3. "Description of Cymbiola Mangeri, a supposed new species of 

 Volute from the Falkland Islands." By H. B. Preston, F.Z.S., etc. 



4. "On three New Operculates (Cyclotus) from Columbia." By 

 S. I. Da Costa. 



Exhibits were placed on the table by the following : — 



R. H. Burne : A wax model of the nervous system of Nueula, 

 reconstructed from sections by drawing on wax plates with a camera 

 lucida. The model showed that Pelseneer is incorrect in representing, 

 as he does, a distinct pleural ganglion in this mollusc. 



H. B. Preston : A specimen of Papa papyracea, Lam., with its 

 operculum. 



E. R. Sykes : Specimens of Cyclophorus from Sumatra and 

 Streptaxis from Annam. 



M. F. Woodward : Specimen of Yolutilithes spinosa, Lam., 

 V. htctatrix, Sol., and V. digitalina, Lam. Attention was drawn to 

 the great similarity which the latter form presented to the living 

 V. (Yolutoeorbis) abysstcola, Ad. & Rve., and comparisons were made 

 with Volutilithes Philippiana of Dall. These showed that the latter 

 differed far more from the type of the genus ( V. spinosa) than did 

 V. abyssicola, which Dall places in the subgenus Volutocorbis. 



J. E. S. Moore : Specimens of Typhobia JPorei, Smith, from the 

 northern and southern ends of Lake Tanganyika, suggesting that 

 the southern was a long- and the northern a short-spined form. 



A. S. Kennard & B. B. Woodward. E. A. Smith, H. B. Preston, 

 and S. I. Da Costa : Specimens in illustration of their respective 

 papers. 



