MANUAL

OF THE

LAND AND FRESH-WATER

SHELLS

ОР

The British Islands,

WITH

FIGURES OF E-ACH OF THE KINDS.

BY

WILLIAM TURTON, M.D.

A New Edition,

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.

"Nothing can be unworthy of being investigated by man, which was thought worthy of being created by God." - BOYLE.

"Divine communications are alike vouchsafed to us by the Volume of Nature, and the pages of inspiration."— BACON.

LONDON:
Printed by A. SPOTTISWOODE,
New-Street-Square.