The Editor of the Challenger Reports will be greatly obliged to 

 Authors sending him copies of separate papers, or references to 

 works in which the Challenger discoveries are referred to, or the 

 observations of the Expedition are discussed. 



This will greatly facilitate the compilation of a complete 

 Bibliography, and the discussion of the results of the Expedition, 

 in the final Volume of the Series. 



Letters and Papers should be addressed — 



JOHN MURRAY, 



Challenged Oee/ce, 



32 Queen Street, 



EDINBURGH. 



PRINTED BY NEILL AND COMPANY, EDINBURGH, 

 FOR HER MAJESTY'S STATIONERY OFFICE. 



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