PROCEEDINGS: DECEMBER 14, 1S98. 151 



and has since spread slowly but steadily southwards. There is strong evidence of 

 its introduction. The shells have always been remarkably uniform in colouring, but 

 have increased greatly in size of late years, and this year very large examples 

 occurred. 



By Mr. B. K. Lucas: A representative collection of the shells occurring in the 

 neighbourhood of Winnington, Cheshire, comprising Helix nemoralis, small but 

 brightly-coloured specimens with ordinary bandings ; H. hispida, H. fusca, Mar- 

 bury ; H aculeata, Owley Wood ; H. rotundata, Hyalinia cdlaria, H. alliaria, 

 H. nitidula, H. crystallina, H. fulva, H. glabra, very fine, from Marbury, and 

 H. excavata var. vitrina, from Owley Wood and Marbury ; Cochlicopa lubrica, 

 Clausilia rugosa, Pupa anglica, from Marbury ; Limntza peregra var. labiata, 

 Hartford ; L. truncahila, Comberbach ; L. stagnalis var. fragilis, Marbury ; L. 

 palustris, large, but much eroded, Hartford ; L. glabra, near Knutsford ; Physa 

 fontinalis, Barnton ; Planorbis contortus and Unio tumidus, from Marbury. 



By Mr. R. Standen : Vertigo moulinsiana from several English localities ; and 

 microscopic preparations of Epistylis anastatica, to illustrate notes read at the 

 meeting. 



By Mr. J. D. Dean : Two remarkably fine specimens of Pinna rudis, to one of 

 which a gigantic specimen of Capulus hungaricus was attached, dredged between 

 Lizard Point and the Manacles, in from sixty to eighty fathoms. 



By Mr. Fred. Taylor : A fine set of Helix pulchella, Riversvale, Ashton-under- 

 Lyne ; Sphariu?n lacustre, Bardsley Canal ; a fine series of Pisidia, Fitton Hill ; 

 and a sinistral specimen of Helix acuta, the Burrows, Tenby. 



By Mr. W. Moss : Succinea cuvieri and Pupa pellucida, Grenada ; Rhytida 

 coguiensis, New Caledonia ; and micro-photographs and slides showing the radula 

 and genitalia of Succinea oblonga, from Kenmare, county Kerry. 



275th Meeting, December 14th, 1898. 

 Mr. J. Cosmo Melvill in the chair. 



Donations to the Library announced and thanks voted : — ■ 

 The Naturalist, no. 503 ; La Feuille des Jeunes Naturalistes, ser. 3, no. 338 ; 

 Irish Naturalist, vol. 7, no. 12 ; the Nautilus, vol. 12, no. 8. 

 New Member Elected. 

 Mr. William Wells Bladen, Stone, Staffordshire. 



Letter Read. 

 From Mr. W. H. Dall, acknowledging the announcement of his election as an 

 Honorary Member of the Society. 



Papers Read. 

 " Notes on the caput-serpentis group of the Genus Cyprcea," by J. Cosmo Melvill. 

 " Note on Mitra (Pusia) rhodochroa Hervier. and M. rhodinosplncra Melv.,"by 

 J. Cosmo Melvill. 



" Dredging at Seaton, Devon," by L. St. G. Byne. 



''■Helix virgata monst. sub-scalari forme, at Churston Ferrers, South Devon," 



by Alfred Sich. 



Exhibits. 



By Mr. Fred. Taylor : A series of very large Helix pisana, taken in a cabbage 

 garden at Tenby. The abundance of food had doubtless been the cause of the 

 extraordinary increase in the size of these shells, as compared with a series of speci- 

 mens collected on the neighbouring sand-dunes, which were considerably under the 

 average size. 



By Mr. Edward Collier : A beautiful series of Pisidium pusillum ; Limncea 

 itivolula; Succinea oblonga, S. putris ; Pupa anglica, and varr. pallida and alba-, 



