EDITORIAL NOTE. 



This volume contains Parts XLI. XLII. and XLIII. of the Zoological 

 Series of Reports on the Scientific Results of the Expedition. 



On the return of the Expedition to England, the whole of the Mollusca, 

 except the Cephalopoda and Pteropoda, were placed in the hands of the 

 Rev. Robert Boog Watson, F.L.S., for examination and description. After 

 separating out the whole collection and labelling the greater number of 

 known species, Mr Watson found it necessary to limit his investigations 

 to the larger groups of the Gasteropoda and Scaphopoda. The collection 

 of Lamellibranchiata was subsequently handed over to Mr E. A. Smith, 

 and his Report has been already published. The Nudibranchiata and 

 several smaller divisions were distributed among other Naturalists. 



The results of Mr Watson's work are given in the extensive Report 

 which makes up the bulk of the present volume ; the other reports being 

 on the Polyplacophora by Professor Haddon, M.A., of the Royal College 

 of Science, Dublin, on the Marseniadse by Dr R. Bergh, and an Appendix 

 to Mr Watson's Report by the Marquis de Folin on the Csecidae. 



John Murray. 



Challkngee Expedition Office, 32 Queen Street, 

 Edinbdegh, August 9, 1886. 



