I'- 



MANUAL 



OF THE 



LAND AND FRESH-WATER SHELLS 



OF 



THE BRITISH ISLANDS. 



WITH FIGURES QJT ;EACH QF THE KINDS. 



%* 



BY 



WILLIAM TUKTON, M.L>. 



t! 



NEW EDITION, WITH ADDITIONS, 

 BY 



JOHN EDWAED GEAT, PH.D., F.E.S. 



F.L.S., F.R.G.S., V.P.Z.S. & ENT. SOC., ETC. 



LONDON: 

 LONGMAN, BROWN, GREEN, LONGMANS, AND ROBERTS. 



1857. 



