BUU-IOGRAI'IIY. 253 



inessanensis var. iattromenica Monts. , H. ineda Pono, //. ti?nei Monts. ; Cioitel/a 

 vescoi Bgl. ; Clansilia syraciisana Phil. ; Poniatias dioiiysi Wesl. ; Piifa ritpes- 

 tris Phil. ; Clausilia giohiiianniana Phil. ; and H. iiniralis Miill.. from the 

 Forum at Rome. 



By Mr. G. C. .Spence : A series of the larger species of Cylindi-ella [Urocop- 

 tidie), with examples of the various groups cut seciionally to show internal 

 characteristics. 



In the Special Exhibit of the Genus Gidbits, Mr. Edward Collier showed a 

 considerable number — twenty-nine species— which he got principally from the 

 Barclay and Da Costa Collections. Included in them was a very fine series of Gibbus 

 lyoneiianiis, one specimen of which, from the Da Costa Collection, was taken alive 

 over one hundred years ago, and is the specimen figured in Wood's Index Testa- 

 ceologictis. He also showed a specimen of m. sinistrorsti»t from the Barclay 

 Collection, of which there are only five specimens known. His series of Gon'to- 

 domiis pagoda and Plicadomus stiLata and ncwtoni were also very fine and in good 

 condition. Messrs. B. R. Lucas, J. W. Baldwin, and T. H. Piatt also showed a 

 number of specimens of the genus, including a remarkable double-mouthed 

 G. pagoda in the latter's collection. Mr. R. Standen exhibited the Manchester 

 Museum Collection of this genus, which includes a fine example of the sinistral 

 variety of G. lyoiietiamis, formerly in the collection of the late Mr. Thos. Norris, 

 and which was presented to the Museum by Mr. J. Ray Hardy. Only three other 

 examples of this form appear to be on record, viz., one in the Paris Museum ; 

 one in the Lyons Museum ; and another in the Lomlie-Taylor Collection in the 

 Calcutta Museum {vide M. Dautzenberg \w Journal de Conchyliologie, vol. Ivii., 

 P- 39, 1909)- 



BIBLIOGRAPHY. 



(limited to works received by the society's librarian). 



Monograph of the Land and Freshwater Mollusca of the British Isles, 



part 18 (pp. 305-368, and 5 plates), by John W. Taylor (Taylor Bros., 



Leeds). 



Another part of Mr. Taylor's niagniiiii opns was published on June 17th, and 

 he must have heaved a very big sigh of relief at leaving Helix nemoralis behind. 

 Besides completing the monograph of that species, the present part deals with 

 Helix horiensis and starts H. pisana. Two of the five plates give us really 

 excellent coloured figures of fifteen different forms of Helix asfersa, great care 

 being evidenced in the selection of characteristic specimens. The special students 

 of H. ne?/iflralis will find in Mr. Taylor's account a very complete compendium of 

 everything bearing on the variation of their favourite species, and of the hosts of 

 varietal names which have been put forward, especially by MM. Moquin-Tandon 

 and Locard. We cannot give Mr. Taylor too much credit for the incidental 

 illustrations which continue to be a feature of his work. We can testify to the 

 excellence of Monterosato's photograph from recent personal experience ! A very 

 full life-history of Drilus jlavescens L. (see page 333 of this part) was published 

 a few years ago in the Transactions of the London Entomological Society. We 

 found the female of this beetle commonly last March and April in Sicily in the 

 shells of quite a number of different Helicida. 



