194 PKOCEtlDINGS OF THE MALACOLOGICAL SOCIETY. 



Dam, on the west bank, 120 metres above sea-level. The Nile, even 

 when held up by the Dam, does not attain a height above sea-level of 

 more than 106 metres at the present time, and at the eai-liest historic 

 period, about 6000 b.c, its level was probably about 114 metres. 



Also an Anomia grown on a Buccinoid. 



Mr. G. K. Gude exhibited specimens of Byakia Smithiana, Gude, 

 and Hemipleeta striata, Gray, from Sumatra. 



Mr. E. A. Smith exhibited malformed specimens of Stromhus 

 Luhua7ius, ITarpa conoidalis, Conus xirgo, and Plelcocheilus gihlonius. 

 Also Hanley's " Photographic Conchology." 



Mr. E. E. Sykes exhibited a copy of the proofs of Leach's " Mollusca 

 of Great Britain." 



Mr. J. E. Cooper exhibited a collection of thirty-eight species of 

 shells from the Falkland Islands. 



Mr. E,. Bullen Newton exhibited specimens of opalized shells from 

 the Cretaceous of New South Wales. 



Mr. A. S. Kennard exhibited specimens of Paludestrina Jenkinsi 

 from Germany and a species of Pomatias from the Red Crag. 



Mr. H. B. Preston exhibited a sinistral form of Volvaria Verdensis, 

 Smith, from Aden ; also leredo Senegalensis from Senegal, having its 

 home in a reed ; also an example of Ostrea Guineensis, detached from 

 a French cruiser after three years service on a West African station. 



ORDINARY MEETING. 



Friday, 8th January, 1909. 



B. B. WooDWAiiD, F.L.S., President, in the Chair. 



The following communications were read : — 



1. " Holocene and Pecent non-marine Mollusca from the neighbour- 

 hood of Perranzabuloe." By Pev. P. Ashington Bullen, B.A., F.L.S. 



2. " Further data on Poli's Generic Names." By Dr. W. H. Dall. 



3. "Descriptions of new species and subspecies of New Zealand 

 Mollusca, with notes on a few species." By Henry Suter. 



The President exhibited skiagraphs of shells. 



Mr. G. B. Sowerby exhibited an interesting series of specimens of 

 Magilus, stating that a study of the shells of divers forms and in 

 different stages of growth had led him to revert to the old opinion 

 that Puppell's genus Leptoconchus was founded simply upon the young 

 state of Magilus. He observed that the forms of the spiral whorls of 

 the adult Magili presented almost as much variation as those of the 

 so-called species of Leptoconchus, the type of the latter genus, L. striatus 

 (Riippell), representing exactly the spiral portion of the most usual 

 form of M. antiquus ; another specimen exhibited, a fine adult Magilus, 

 had a spiral nucleus exactly corresponding with L. Lamarchi (Desh.) ; 

 other specimens showed strong resemblances to Deshayes' species 

 RUppelli, Cuvieri, and Cumingi. The absence of an operculum in 

 Piippell's species was referred to as remarkable, but the fact that 



