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.&R, 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. 



LIBRARY 



UNIVERSITY OF CALIFORNIA 

 DAVIS 



MACMILLAN AND CO. 



1873. 



