PROCEEDINGS : DECEMBER I3, I905. 273 



" To the Hon. Secretary of the Conchological Society of Great Britain and 

 Ireland : 

 My Dear Sir, 



Your esteemed favour of the 24th inst. informs me that the Conchological 

 Society has resolved to elect me an Honorary Member. I accept this nomination 

 as a great honour, which certainly will excite me to merit it. I beg you heartily to 

 present to the Society my sincerest thanks. 



Yours very sincerely, 



Hermann Strebel." 

 Papers Read. 



"On Variation in the Radulre of certain BuccinidEe,"'by M. V. Lebour. 



"West Lancashire Non-Marine Mollusca : Morecambe and district," by H. 

 Beeston. 



" Mollusca of Silverdale district," by R. Standen. 



" West Suffolk Mollusca," by R. Mayfield. 



" HeUcella virgata," by F. B. Jennings. 



" Sinistral Helicigona aj-bustorum,^'' by the Rev. W. A. Shaw. 



" Acanthinula lauimata" by J. W. Jackson . 



Exhibits: 



By Mr. W. J. Hall : Specimens of Terebratula biplicata, Sowerby, from the 

 Rev. A. Dixon's Collection of Cambridge Greensand Fossils, in the Manchester 

 Museum, illustrating marked variations in form between the limits of extreme youth 

 and old age. The gradation is so clearly shown as to prove undoubtedly the 

 accuracy of the specific determination of the series, and suggests that when so- 

 called new species of fossil shells are created, too little attention is devoted to this 

 aspect of the question. Moreover, T. biplicala is apparently an ancestral form of 

 several species of Terebratula occurring in the succeeding chalk, as well-defined 

 graduated series have been traced between them. 



By Mr. T. H. Piatt : On behalf of Mr. Thos. Taylor, Helix aspersa from 

 Greymouth, New Zealand. 



By Mr. A. Mayfield : A fine set of West Suffolk Non- Marine Mollusca, to 

 illustrate his paper. 



By Mr. R. Standen: Some remarkably large and massive shells of Li77iax 

 arboruiii, from Armoy, co. Antrim ; Vitrea glaber Studer, from Budapest, 

 Hungary {ex. Crosse Collection); and Seg»ie>ttina nitida from Pevensey Marsh, 

 Eastbourne. 



By Mr. J. Ray Hardy : Ancylus fluviatilis, a curious form taken from the old 

 stone waterpipes of Bath Oolite, which for so long supplied Manchester with water. 

 When these pipes were taken up in Mosley Street, in 1876, numbers of Ancylus 

 were found inside them, apparently quite healthy in their dark subterranean abode. 

 The shells are very thick, white, and much elevated, with a solid and somewhat 

 eroded apex, the apical hook overhanging the posterior margin (var. gibbosa 

 Bourg.). 



347th Meeting-, December 13th, 1905. 



Mr. Edward Collier (vice-president) in the chair. 

 Donations to the Library announced and thanks voted : 

 The usual periodicals received in exchange 



Candidates Proposed for Membership. 



James R. Plant, M.R.C.S., etc., 107, Hinckley Road, Leicester. 

 Clement L. Wragge, F. R.G. S., etc., 26, Jasper Road, Upper Norwood, 

 London, S.E. 



