vxo REPORT ''"'-^ 



ON THE 



SCIENTIFIC RESULTS 



VOYAGE OF H.M.S. CHALLENGER 



DURING THE YEARS i K 7 3-7 o 



UNDER THE COMMAND OF 



Captain GEORGE S. NARES, R.N., F.R.S. 



AND THE LATE 



Captain FRANK TOURLE THOMSON, R.N. 



PREPARED UNDER THE SUPERINTENDENCE OE 



THE LATE 



Sir C WYVILLE THOMSON, Knt.. F.R.S.. .U\ 



KEGHTS PROFESSOR OF NATURAL HISTORY IN THE UNIVERSITY OF KDINBURGH 

 DIRECTOR OF THE CIVILIAN SCIENTIFIC STAFF ON BOARD 



AND NOW OF 



JOHN MURRAY 



ONE OF THE NATURALISTS OF THE EXPEDITION 



Zoology — Vol. XX. 



PART LXII.— REPORT ON CEPHALODISCUS DODECALOPHUS 

 Bv WILLIAM C. M'INTOSH, M.U.. LL.D., F.R.S., &C. 



lPubUsi)eD bp (2^iDer of Ipcu iBaiesti)'5 ^^oiifrnmrnt 



PRINTED FOR HER MAJESTY'S STATIONERY OFFICE 



AND SOLD BV 



LONDON:— EYRE & SPOTTISWOODE, EAST HARDING STREET, FETTER LANt 



EDINBURGH:— ADAM & CHARLES BLACK 



DUBLIN :-HODGK.S. FIGGIS, & CO. 



1887 



Price Four Shillings. 



