PROCEEDINGS OF THE CONCHOLOGICAL SOCIETY. 357 



CONCHOLOGICAL SOCIETY 

 OF GREAT BRITAIN AND IRELAND. 



PROCEEDINGS 



217th Meeting (Annual Meeting), Saturday, i6th Sept., 1893, 



Held at Burton-011-Trent, by kind invitation of the President, Mr. 

 Philip B. Mason, F.L.S. 



At 1-30 p.m. the President's Museum and general collections were on 

 view to the members at his residence, Trent House, Bridge Street. 



At 4 p.m. the members were entertained by the President to tea in one 

 of the rooms attached to St. Paul's Institute. 



After tea, his fine collection of Mollusca of the British Islands and Seas 

 was shown, having previously been specially arranged for exhibition in the 

 spacious large room of the Institute. It contained over 25,000 specimens of 

 British Shells, the collection being especially formed to show the range of 

 variation in each species in size, form, sculpture, and colour — long series 

 of littoral shells frotn different localities having been collected for this 

 purpose. Amongst them the following were especially noticeable : — ■ 

 Very full series of all the species of Teredo ; unusually fine and perfect 

 Thracia convexa and piibescens ; a great many of the OdostoiiiicB collected 

 by Mr. W. Clark at Exmouth, from which he described the animals in 

 his book ; good series of Buccimim and Fusus, including two Fnuis 

 fenestrattis, viz., one of the original Cork specimens, and the other a living 

 shell dredged by Jeffreys off Valentia ; very long series of their varieties 

 and monstrosities ; all the best specimens collected by W. W. Walpole of 

 Dublin from the Irish coast ; all specimens which were worth acquisition 

 from the Leckenby collection, including those dredged with Jeffreys in their 

 joint Shetland expeditions ; among others, sinistral specimens of Littorina 

 littorea and Helix erketonim and a dextral Balea perversa ; among the 

 land and freshwater shells are the collection made in the earlier part of the 

 century by Pickering around London in numerous localities now destroyed ; 

 and the whole collection of the Rev. Revett Sheppard, inchiding the types 

 described by him in the Liimean Transactions. 



In addition to the President's collections, there were a number of ex- 

 hibits by the following members : 



Mr. B. Sturges Dodd, of Nottingham, showed a collection illustrative 

 of the following species of Teredines : Teredo norvegica, T. navalis and var. 

 occlusca, T. pedicellata, T. megotara, var. onionata, var. siibericola, T. 

 malleolus, T. bipinnata, T. fitnbriata, and Xylophaga dorsalis, including an 

 example of a submarine telegraph cable having been attacked and perfor- 

 ated through gutta-percha, the outer steel casing and other protections having 

 been removed ; also a portion of fossil wood perforated by Teredines from 

 London clay-deposits. Isle of Sheppy. Mr. Dodd also had a collection of 

 Otoliths, and various other interesting objects. 



Mr. J. R. B. Masefield, M.A., exhibited Dreissensia polymorpha from 

 the Colwich Canal, Limncea peregra var. ampullacea from near Cheadle, and 



