PROCEEDINGS : OCTOBER I, I904. 153 



By Mr, J. E. Cooper : Puncttini pygriutntn from Marden Park, Surrey. 



By Mr. Fred. Taylor : Vivipara contecta, a bandless, uniform, dark purple 

 variety, equivalent to V. vivipara var. atro-ptu-piirea, from Wicken Fen, Cambs. , 

 a remarkable scalariform Planorhis corneiis, and a series of British Vertigines. 



By Mr. J. Wilfrid Jackson : An interesting series of shells obtained by Mr. 

 J. D. Dean and himself from the " Chara Marl " deposit at Hawes Water, near 

 Silverdale, Lanes., with specimens of the deposits and maps and sectional plans; 

 also a set of the shells now living in the vicinity. 



By Mr. Thomas Edwards : A series of Helicidt^ from U.S. America ; a fine set 

 of sinistral, acuminate, carinate, scalariform and other monstrous forms oi Buccintim 

 undaluni ; Purpura lapillus, type and vars. ; Neptunea antiqua monst. contrarium 

 — all from Thanet coast, Kent. 



By Mr. C. E. Wright: Selected varieties of Helicidoe and LiinncEa, from Hants., 

 Kent, Northants, Sussex, Dorset, Leicestershire, Norfolk, and Guernsey, including 

 many beautiful and uncommon forms of Helix nemoralis and H. hortensis. 



By Mr. W. Denison Roebuck : A living example of Limax tenellus from Kin- 

 cardineshire, taken 23rd Sept., 1904, at Invercannie near Banchory, by Mr. George 

 Sim, and sent along with a variety of other slugs to Mr. Roebuck ; also living 

 examples of an almost albino form, with black eye-specks, of the tree slug, Limax 

 arborum, taken near the Botanic Garden, at Old Aberdeen. 



By Mr. Lionel E. Adams : Specimens of the various bivalves used as food in the 

 United States under the general name of " Clam," as exhibited at the St. Louis 

 Exhibition, and presented to the Manchester Museum by H. F. Moore, Esq. , of the 

 Department of Commerce and Labor, Washington. 



By Mr. J. T. Wadsworth : Barnea Candida, preserved with siphons extended, 

 from Meols, Cheshire, and Microscopic sections of the luminous organs of certain 

 Cephalopods^(«) from the mantle of Abraliopsis ; {b) from the siphon, and in 

 front of the eye, of Pyrotenthis niargaritifera ; (c) from the mantle of Hisiiopsis 

 atlaiitica ; also the epithelial organ of Polypus arborescens. 



By Mr. R. Drummond : Teredo niegotara from floating timber, Blackpool. 



By Mr. E. D. Bostock : Very large Ancylus fluviatilis var. capuloides. 



By Mr. J. Ray Hardy : A keel-less form of Helicigona lapicida from Derbyshire. 



By Mr. R. Standen : Dreissensia polyinorpha, from most of its British localities, 

 a fine series, illustrating the extreme variation of the species, and including some 

 "historic" sets, collected many years ago, in localities now obliterated, by some of 

 the older Manchester naturalists. 



By Mr. C. H. Moore : Anodonta cygnea and Uiiio tu?nidus, caught whilst spin- 

 ning for pike in the river Trent, at Lanham, near Nottingham. 



By Mr. J. D. Dean : LinincBa pereger and Pisidium pusillum, from Knott 

 Hollow, Ulverston, alt. 500 ft.; Planorbis albus, PI. font anus, and Valvata cris- 

 tata, from Bank Well, Silverdale. 



By the Manchester Museum : Twelve large drawers of European land shells ; 

 moUusca of Lakes Tanganyika, Nyanza, and Nyassa, and other shells ; the whole 

 being a selection from the extensive collection of mollusca recently presented to the 

 Museum by Mr. R. D. Darbishire ; a set oi Rostellaria delicatnla Nevill, from the 

 Persian Gulf (Townsend Collection), showing growth stages and variation in the 

 denticulation. 



The Shell Gallery was also thrown open for the inspection of members, a 

 number of special exhibits being on view in the side cases, including shell-boring 

 mollusca, Cardiuin, and other shells from Lake Baikal, Sea of Aral, etc., illustrat- 

 ing influence of freshwater upon marine forms ; pearl-bearing mollusca, etc. 



