EDITOEIAL NOTES. 



This volume contains Parts XXXV., XXXVI., and XXXVII. of the 



Zoological Series of Reports on the Scientific Results of the Expedition. 



Part XXXV. — On the return of the Expedition the Mollusca were placed 

 in the hands of the Rev. R. Boog Watson, F.R.S.E., for description; but 

 after separating out the different species, and labelling the greater part of the 

 known ones, Mr. Watson determined, on account of the large size of the 

 collection, to limit his work to the description of the Scaphopoda and 

 Gasteropoda. 



Mr. Edgar A. Smith, F.Z.S., of the British Museum was then requested 

 to undertake the preparation of the Report on the Lamellibranchiata. This 

 he consented to do, and this Part gives the result of his investigations. 



Mr. Watson's own Report is now nearly all in type, and will be published 

 in the course of a few months. 



Part XXXVI. — The description of the Gephyrea collected by the 

 Expedition was originally undertaken by Professor E. Ray Lankester, F.R.S., 

 but after the publication of Professor Selenka's splendid systematic Monograph 

 on this group. Professor Lankester suggested that it would be much better 

 if an arrangement could be made by which Professor Selenka should take 

 over the examination of the Challenger collection. Professor Selenka com- 

 plied with a request to do so, and this Part gives the result of his labours. 



The Report was translated from the German by J. Arthur Thomson, 

 Esq., M.A. 



