220 JOURNAL OF CONCHOLOGY, VOL. I3, NO. 7, JULY, I9II. 



Mr. y. Wilfrid Jackson also exhibited several examples of ihe Oligocene fossil 

 form, ArnphidroniHS ellipticus ([. Sow.), from the Beml)ridge Limestone, Isle of 

 WiHit. 



401st Meeting', held at Manchester Museum, April 12th, 191 1. 



Mr. E. Collier in the chair. 



The Librarian reported that the usual periodicals had been received in exchange. 



On behalf of Miss Chaster, of Southport, a handsomely-framed portrait of her 

 brother (the late Dr. Chaster, sometime President of the Society) was presented and 

 the Secretary was instructed to convey the warm thanks of the members to her for 

 this highly valued gift. 



Candidate Proposed for Membership. 



Harry Allan, Junr. , Silverstone, Cheadle Heath, Stockpoft. 

 Member Deceased. 



Rev. A. E. Northey, M.A., Torquay. 



Exhibits. 



By Mr. A. VV. Stelfox : Unio tiunidtts, U. pictonmi (type, and a form approach- 

 ing var. cii7-virostris) from canal at Weybridge, .Surrey; Vertigo pygtiuea and V. 

 substriata from N.E. shore, Clare Island, 1909. 



By Mr. R. Standen : Very large Petricola pholadiforiiiis from Mablethorpe, 

 Lines., and a fine specimen of Calliostoma occidentak collected at Clee, Lines., by 

 Mr. Arthur Smith — this was found, along with other uncommon species, on the 

 shore after a strong gale and heavy tide, when the tide-line debris was knee-deep. 

 An interesting series oi Aporrkais ties-pelicani, showing gradations in growth from 

 the earliest nepionic whorls to adult stage, from .Southport; and growth stages in 

 Sti'ombiis gjgas, to illustrate the striking difference between juvenile and fully- 

 grow'n specimens. Heiiiifiisiis tuba Gmel., and var. crassicaiida Phil., from China. 

 Very fine and perfect Meleagrina maygaritifera from japan. 



By Mr. R. Woodcock : Some pretty examples of Modiolaria discors found living 

 in a sponge growing on Pecten opemilaris; and Curdtunt ex'gtmin from Jersey. 



By Dr. Kenneth H. Jones : Margaritava margaritifera from Glengarifl"; 

 LiinniEa involuta from Barley Lake, Glengarifl", and Linin,ea pereger from an 

 adjacent lough, some of which approach /.. involuia very nearly in intortion of 

 spire and general appearance. 



By Rev. L. Shackleford : Voluta p^dchm, V. ja/nrachi, V. thatclieri ; varieties 

 of V. flavicans; and a number of varietal forms of V. hebrica. 



By Mr. J. Kidson Taylor: A fine series of Cochlostyla, including C. eleclrica, 

 and many scarce varieties of C. mirabilis, C. Jischej-i, C. fiilgelruiii, C. pictor and 

 C. reii/iicosa; Ainphidromus daiitzenbergi — the first co-type brought to this 

 country, and the later described sinistral form of this rare species, from Muong- 

 Kong, Tonkin. 



By Mr. G. P. Richards: Aniphidromits iiiterrupttis var. infrapirtiis, A. 

 maculifenis, Paihyotis nielanostoinns, Cypnea erosa var. strnminea and var. cJilofi- 

 zaiis Mel v., C. poraria var. kaiiaiensis Melv. , and C. capiii-colitbri Kenyon. 



By Mr. G. C. Spence: Specimens of Dreissevsia polvtnorpha collected in the 

 Lancaster canal during February, 1910 and 1911, to illustrate the remarkable 

 difference in growth and amount of erosion of the shells during the twelve months' 

 interval; also a fine copy of Captain Thomas Brown's "Conchology of Great 

 Britain and Ireland," 1st edition, 1S27. 



Hy Mr. T. H. Piatt : Soleit siliqua, Scaphander /ignariits, Kelicella virgata 

 and var. leucozoiia and var. Intescens, H. acuta and var. bizona and var. grisea, H. 

 caperata. Helix nenioralis, Coclilicopa liib?-ica,, Jaminia cyliiidracea, and J. nuts- 



