﻿THE 
  ANNALS 
  

  

  AND 
  

  

  MAGAZINE 
  OF 
  NATURAL 
  HISTORY. 
  

  

  [SIXTH 
  SERIES.] 
  

   ISTo. 
  18. 
  JUNE 
  1889. 
  

  

  LIV. 
  — 
  Notes 
  on 
  British 
  Arnphipoda. 
  — 
  I. 
  Megaluropus, 
  n. 
  g. 
  } 
  

   and 
  some 
  (Ediceritke. 
  By 
  the 
  Rev. 
  A. 
  M. 
  NORMAN, 
  

   M.A., 
  D.C.L., 
  F.L.S. 
  

  

  [Plates 
  XVIII.-XX.] 
  

  

  My 
  purpose 
  in 
  these 
  notes 
  is 
  to 
  describe 
  new 
  or 
  little-known 
  

   Arnphipoda, 
  to 
  correct 
  nomenclature, 
  and 
  to 
  give 
  details 
  

   regarding 
  distribution. 
  

  

  At 
  the 
  time 
  when 
  Messrs. 
  Bate 
  and 
  "Westwood's 
  l 
  History 
  

   of 
  British 
  Sessile-eyed 
  Crustacea 
  ' 
  was 
  published 
  the 
  subject, 
  

   more 
  especially 
  as 
  regards 
  the 
  Arnphipoda, 
  had 
  been 
  little 
  

   studied. 
  Sexual 
  differences 
  had 
  scarcely 
  been 
  recognized, 
  

   and 
  still 
  less 
  the 
  alterations 
  of 
  structure 
  dependent 
  upon 
  age 
  ; 
  

   hence 
  many 
  errors 
  crept 
  in. 
  But 
  a 
  more 
  serious 
  obstacle 
  to 
  

   the 
  full 
  and 
  accurate 
  description 
  of 
  the 
  forms 
  was 
  the 
  scarcity 
  

   of 
  specimens 
  at 
  the 
  disposal 
  of 
  the 
  authors 
  for 
  examination. 
  In 
  

   a 
  large 
  number 
  of 
  instances 
  species 
  were 
  described 
  from 
  single 
  

   individuals 
  which, 
  having 
  been 
  merely 
  entrusted 
  to 
  the 
  authors 
  

   for 
  examination, 
  they 
  were 
  unable 
  to 
  dissect 
  ; 
  moreover 
  in 
  some 
  

   instances 
  these 
  specimens 
  were 
  dried, 
  and 
  presented 
  there- 
  

   fore 
  the 
  greatest 
  difficulties 
  with 
  respect 
  to 
  their 
  full 
  elucida- 
  

   tion. 
  It 
  is 
  only 
  by 
  dissecting 
  and 
  mounting 
  the 
  organs 
  of 
  

   the 
  Arnphipoda 
  that 
  their 
  structure 
  can 
  be 
  fully 
  and 
  properly 
  

   Ann. 
  & 
  May. 
  N. 
  Hist. 
  Ser. 
  G. 
  Vol 
  iii. 
  31 
  

  

  