MANUAL 



OF THE 



LAND AND FRESH-WATER 

 SHELLS 



Cftt Britis* 



WITH 



FIGURES OF EACH OF THE KINDS. 



BY 



WILLIAM TURTON, M.D. 



THOROUGHLY REVISED AND MUCH ENLARGED, 

 BY 



JOHN EDWARD GRAY, F.R.S., &c. 



LONDON: 



PRINTED FOR 



LONGMAN, ORME, BROWN, GREEN, AND LONGMANS, 



PATERNOSTER-ROW. 

 1840. 



