goung; Collector 



LAND AND FRESH-WATER SHELLS 



AN INTRODUCTION TO THE STUDY OF 

 CONCHOLOGY. 



J. W. WILLIAMS, M.A., D.Sc., F.S.L.A., 



GOLD MEDALLIST, S.Sc., LONDON; 



Member of the Conchological Society of Great Britain and Ireland ; Member of the 



Scottish Meteorological Society ; Conchological Referee to the Wesley 



Scientific Society; Author of" The Shell-Collector's 



Handbook for the Field," 



WITH A CHAPTER ON THE 



DISTRIBUTION OF THE BRITISH LAND AND 

 FRESH-WATER MOLLUSC A, 



BY 



J. W. TAYLOR, F.L.S., 



JLditor of" The Journal of Conchology " ; Ex-President of the Conchological Society oj 



Great Britain and Ireland; and Membre Honoraire de la Societe 



Malacologiqiie de France; 



AND 



W. DEN1SON ROEBUCK, F.L.S. 

 / 



SECOND EDITION 



LONDON : 



SWAN SONNENSCHEIN & CO., 

 PATERNOSTER SQUARE. 



1892. 



