THE

DEPTHS OF THE SEA.

AN ACCOUNT OF THE GENERAL RESULTS

OF THE

DREDGING CRUISES OF H.M.SS. 'PORCUPINE' AND 'LIGHTNING

DURING THE SUMMERS OF 1868, 1869, AND 1870,

UNDER THE SCIENTIFIC DIRECTION OF

DR. CARPENTER, F.R.S., J. GWYN JEFFREYS, F.R.S.,

AND DR. WYVILLE THOMSON, F.R.S.

BY

C. WYVILLE THOMSON,

LL.D., D.Sc., F.R.SS. L. & E., F.L.S., F.G.S., ETC.

Regius Professor of Natural History in the University of Edinburgh,

And Director of the Civilian Scientific Staff of the 'Challenger' Exploring Expedition.

WITH NUMEROUS ILLUSTRATIONS AND MAPS.

New York and London:
MACMILLAN AND CO.

1873.

The Right of Translation and Reproduction is reserved.]

LONDON:

R. CLAY, SONS, AND TAYLOR, PRINTERS,

BREAD STREET HILL.