No. 6.] APRIL, 1884. [Vol. 4 



THE 



JOURNAL 



OF 



CONG HO LOGY. 



ESTABLISHED IN 1 8 74 AS 



THE QUARTERLY JOURNAL OF CONCHOLOGY. 



OOITTENTS. 



ORIGINAL COMMUNICATIONS: page. 



Subfossil Shell Deposits in Nottinghamshire. — C. T. Musson ... 161 



The Darts of British Helicidse, part iv. — C. Ashford ... ... 164 



Valvata piscinalis v. albina in England. — ^J. W. Taylor ... ... 173 



Present State of Knowledge of the Distribution of Freshwater 



Mollusca in Britain ... ... ... ... ... 174 



List of Land and Freshwater Mollusca of Peterborough. — A. W. Nicholls 185 



Authenticated List of the Mollusca of Mid- West Yorkshire ..." i88 



PROCEEDINGS of the CONCHOLOGICAL SOCIETY 171 



BIBLIOGRAPHY 184 



OBITUARY 170 



LONDON : D. BOGUE, St. Martin's Place, W.C. 



LEEDS: TAYLOR BROS., Hunslet New Road. 



BERLIN; R. FRIEDLANDER & SOHN, Carlstrasse, ii. 



HOBART TOWN, TASMANIA : W. LEGRAND. 



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