Collector Series*] 



LAND AND FRESH-WATER SHELLS 



AN INTRODUCTION TO THE STUDY OF 

 CONCHOLOGY. 



BY 



J. W. WILLIAMS, M.R.C.S. (E N G.), F.L.S., F.R.M.S., 



Licentiate of the Royal College of Physicians of Lcndon and Fellow of the Anthropological 



Institute; Member of the Anatomical Society of Great Britain and Ireland 



and of the British Astronomical Association. 



WITH A CHAPTER ON THE 



DISTRIBUTION OF THE BRITISH LAND AND 

 FRESH-WATER MOLLUSCA, 



BY 



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



Membre Honoraire de la Societe Malacologique de France ; A uthor of " A Monograp \ of ths 

 Land and Fresh-water Mollusca of the British Isles " ; 



AND 



W. DENISON ROEBUCK, F.L.S. 

 FOURTH AND REVISED EDITION. 



Xonfcon 

 SWAN SONNENSCHEIN AND CO., LIM. 



25 HIGH STREET, BLOOMSBURY 

 1907 



