248 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Helicigona arhustorum, and Limncaa stagnalis, together "with distortions 

 of other land-shells. 



By the President : A series of Buccinum undatum illustrating 

 variation in size, shape, and sculpture, left-handedness, and duplication 

 of the operculum, sinistral specimens of Marginella, Gibhus, and Helix, 

 as well as distorted examples of Littorina litorea and colour varieties 

 of Helix picta. 



By Mr. G. K. Gude : Yarieties of Helix mperm from various parts 

 of the world. Specimens of Euhadra peliomphala, E. Luchuana, and 

 E. qimsita. Sinistral forms of HeliceUa virgata^^H. Cantiana., and Helix 

 pomutia. Specimens of Helicigona arbustorum with corroded peristome. 



By Mr. F. G. Bridgman : Specimens of the genus Oliva, showing 

 colour variation. 



By Eev. R. Ashington Bullen : An abnormal example of Neritina 

 pupa. 



By Mr. S. I. Da Costa : A coloured variety of Pecten niveus. 

 A specimen of Burtoa Arnoldi, with eggs, from the Zambesi, and of 

 Burtoa Nilotica, var. crassa, from Mashonaland. 



By Mr. R. Bullen Newton : Specimens of Bistorsio from the Upper 

 Tertiary of Italy. Shells of this genus show constant irregularities in 

 the form of the spire. 



By Capt. Peile : Distorted specimens of Euchelus. Varieties of 

 Purpura carinifera and of Ariophanta Icevipes, Cyprcea pallida, and 

 other genera. 



By Mr. A. S. Kennard : A sinistral example of Helicigona arbustorum 

 from Uxbridge. Fossil and recent specimens of Pisidium amnicum 

 showing mended fractures. 



By Mr. J. Cosmo Melvill : A reversed variety of Acavus hmnastoma; 

 a monstrous form of Conus arenatus, with conspicuously turreted spire ; 

 a distorted example of Cyprcea stolida ; and a specimen of Oliva gibhosa, 

 var. mediocincta, Melv. 



ORDINARY MEETING. 



Friday, 10th February, 1905, 



E. R. Sykes, B.A., President, in the Chair. 



