﻿TWO 
  NEW 
  FORMS 
  OP 
  CHONIOSTOMATIDiE. 
  347 
  

  

  Two 
  New 
  Forms 
  of 
  Choniostomatidse: 
  

  

  Copepoda 
  Parasitic 
  on 
  Crustacea 
  Malacostraca 
  

   and 
  Ostrocoda. 
  

  

  By 
  

  

  II. 
  J. 
  Hansen, 
  D.Sc, 
  F.M.L.S. 
  

  

  (Copenhageu). 
  

  

  With 
  Plate 
  22. 
  

  

  During 
  a 
  stay 
  — 
  in 
  August, 
  1902 
  — 
  in 
  the 
  house 
  of 
  my 
  friend, 
  

   the 
  Rev. 
  Canon 
  A. 
  M. 
  Norman, 
  I 
  had 
  the 
  good 
  luck 
  to 
  discover, 
  

   in 
  his 
  splendid 
  collection, 
  a 
  new 
  pai'asitic 
  Copepod 
  on 
  a 
  couple 
  

   of 
  specimens 
  of 
  a 
  rare 
  Norwegian 
  Amphipod. 
  He 
  asked 
  me 
  

   to 
  work 
  out 
  the 
  parasite, 
  which 
  I 
  promised, 
  and 
  the 
  result 
  is 
  

   given 
  here. 
  

  

  Since 
  the 
  present 
  writer, 
  six 
  years 
  ago, 
  published 
  the 
  book, 
  

   ' 
  The 
  Choniostomatidfe,^ 
  Copenhagen, 
  1897 
  (4to), 
  no 
  species 
  

   has 
  been 
  added 
  to 
  this 
  rich 
  and 
  very 
  interesting 
  family 
  of 
  

   parasitic 
  Copepoda, 
  though 
  the 
  animals 
  do 
  not 
  seem 
  to 
  be 
  so 
  

   rare 
  as 
  probably 
  generally 
  believed. 
  In 
  the 
  preface 
  to 
  the 
  

   book 
  named 
  I 
  stated 
  that 
  in 
  the 
  course 
  of 
  1895-97 
  I 
  had 
  

   found, 
  " 
  on 
  the 
  material 
  brought 
  home 
  from 
  the 
  sea 
  near 
  

   Iceland 
  and 
  Greenland 
  by 
  the 
  'Ingolf 
  expedition, 
  several 
  

   new 
  forms 
  which 
  cannot 
  be 
  included 
  in 
  the 
  present 
  treatise,'^ 
  

   and 
  since 
  1897 
  I 
  have 
  accumulated 
  additional 
  material. 
  

   Dui'ing 
  the 
  study 
  of 
  the 
  species 
  from 
  Canon 
  Norman's 
  collec- 
  

   tion 
  I 
  felt 
  that 
  a 
  paper 
  dealing 
  only 
  with 
  that 
  single 
  form 
  

  

  