MANUAL

OF THE

LAND AND FRESH-WATER

SHELLS

OF

The British Islands,

WITH

FIGURES OF EACH 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.