THE

LAND AND FRESH-WATER SHELLS

OF

THE BRITISH ISLANDS.

LONDON:

Printed by SPOTTISWOODE & CO.

New-street Square.

JOHN EDWARD GRAY, PH.D., F.R.S.
F.L.S., F.R.G.S., V.P.Z.S. & ENT. SOC., ETC.

LONDON:

LONGMAN, BROWN, GREEN, LONGMANS, AND ROBERTS.

"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.

"Deum sempiternum, omniscium, omnipotentem a tergo transeuntem vidi et obstupui! Legi aliquot ejus vestigia per creata rerum, in quibus omnibus etiam minimis ut fere nullis quæ vis! quanta sapientia! quam inextricabilis perfectio!" LINN. Syst. Nat. p. 8.

MY HELPMATE IN ALL MY STUDIES AND ALL MY CARES,

THIS LITTLE WORK IS

Dedicated

BY

HER AFFECTIONATE HUSBAND,

JOHN EDWARD GRAY.