viii THE VOYAGE OF H.M.S. CHALLENGER. 



cation has been reformed and placed on a new basis. The new order, 

 Auronectae, discovered by the Challenger in the depths of the ocean, 

 is particularly interesting to naturalists. 



The Introduction, giving a general account of the morphology of the 

 order, was translated from the German Manuscript by Mr. J. Arthur 

 Thomson, M.A., F.R.S.E. All the remaining part of the Report was written 

 by Professor Haeckel in the English language. 



This Report on the Siphonophor^e forms Part LXXVII. of the Zoological 

 Series of Reports, and consists of 383 pages and 50 chromo-lithographic 

 plates. 



John Murray. 



Challenger Office, 32 Queen Street, 

 Edinburgh, October 13, 1888. 



