THE 



DEPTHS OF THE SEA. 



AN ACCOUNT OF THE GENERAL RESULTS 



OF THE 



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

 DUEUSTG THE SUMMERS OF 1868, 1869, AND 1870, 



UNDEE THE SCIENTIFIC DIRECTION OF 



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

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



C. WYVILLE THOMSON, 



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



Regius Professor of Natural History in the University of Edinburgh, 



And Director of tlie Civilian Scientifie Staff of the 'Challenger' Exploring Expedition. 



-WITH NUMEROUS ILLUSTRATIONS AND MAPS. 



MACMILLAN AND CO. 



1873. 



