﻿356 
  H. 
  J. 
  HANSEN. 
  

  

  shaped, 
  strongly 
  sinuate 
  receptacula 
  (>■) 
  are 
  situated 
  at 
  the 
  

   admedian 
  margin 
  of 
  the 
  muscles; 
  on 
  the 
  figure 
  the 
  two 
  

   receptacula 
  are 
  very 
  differently 
  curved 
  ; 
  they 
  were 
  drawn 
  in 
  

   the 
  position 
  observed, 
  but 
  I 
  believe 
  that 
  the 
  receptaculum 
  on 
  

   the 
  left 
  half 
  of 
  the 
  figure 
  is 
  the 
  normal 
  one. 
  The 
  caudal 
  

   stylets 
  (st) 
  are 
  fused 
  with 
  each 
  other, 
  together 
  a 
  little 
  

   broader 
  than 
  long, 
  more 
  or 
  less 
  incise 
  behind, 
  and 
  from 
  the 
  

   end 
  of 
  each 
  half 
  originates 
  a 
  comparatively 
  strong 
  seta 
  which 
  

   is 
  from 
  two 
  to 
  almost 
  three 
  times 
  longer 
  than 
  the 
  stylets; 
  

   these 
  are 
  inserted 
  on 
  the 
  posterior 
  (upper) 
  margin 
  itself 
  of 
  

   the 
  chitinised 
  area. 
  

  

  Male. 
  — 
  Unknown. 
  

  

  Ovisacs. 
  — 
  They 
  differ 
  very 
  considerably 
  in 
  size, 
  and 
  are 
  

   subglobular, 
  shortly 
  ovate 
  or 
  somewhat 
  flattened. 
  I 
  have 
  

   figured, 
  with 
  the 
  same 
  degree 
  of 
  enlargement, 
  one 
  of 
  the 
  

   smallest 
  (fig. 
  2 
  c) 
  and 
  one 
  of 
  the 
  largest 
  (fig. 
  2 
  d) 
  ovisacs 
  

   together 
  with 
  the 
  largest 
  of 
  the 
  two 
  females 
  found 
  together 
  

   with 
  them 
  ; 
  the 
  greatest 
  dimension 
  of 
  the 
  smallest 
  ovisac 
  is 
  

   •2 
  mm., 
  of 
  the 
  largest 
  one 
  '27 
  mm. 
  The 
  eggs 
  are 
  propor- 
  

   tionately 
  large, 
  in 
  one 
  of 
  the 
  smallest 
  ovisacs 
  about 
  eight 
  or 
  

   nine, 
  in 
  a 
  large 
  one 
  between, 
  twenty 
  and 
  thirty. 
  

  

  Larva 
  and 
  Post-larval 
  Development. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Years 
  ago 
  I 
  discovered 
  this 
  species 
  in 
  three 
  

   specimens 
  of 
  the 
  Ostrocod 
  Sarsiella 
  hispida, 
  Brady, 
  from 
  

   Akaroa 
  Harbour 
  (New 
  Zealand), 
  six 
  fathoms. 
  In 
  two 
  speci- 
  

   mens 
  I 
  found 
  only 
  a 
  female 
  without 
  ovisacs, 
  in 
  the 
  third 
  

   specimen 
  one 
  rather 
  large 
  female, 
  one 
  very 
  small, 
  half 
  

   evacuated 
  female, 
  and 
  eight 
  ovisacs. 
  Between 
  several 
  hun- 
  

   dreds 
  of 
  Sarsiella 
  Hanseni, 
  Brady, 
  from 
  Lyttleton 
  

   Harbour 
  (New 
  Zealand), 
  one 
  to 
  five 
  fathoms, 
  I 
  found 
  a 
  good 
  

   number 
  of 
  Sarsiella 
  hispida, 
  Brady, 
  and 
  two 
  of 
  these 
  

   infested, 
  in 
  one 
  specimen 
  a 
  female 
  without 
  ovisacs, 
  in 
  the 
  

   other 
  one 
  very 
  small 
  female 
  with 
  nine 
  ovisacs. 
  The 
  parasite, 
  

   surrounded 
  by 
  its 
  ovisacs, 
  is 
  placed 
  in 
  the 
  posterior 
  upper 
  

   half 
  of 
  the 
  space 
  between 
  the 
  shells, 
  essentially 
  above 
  

   the 
  posterior 
  half 
  of 
  the 
  body 
  of 
  the 
  Ostracod 
  ; 
  some 
  

   of 
  the 
  ovisacs 
  were 
  also 
  found 
  within 
  the 
  hollow 
  pro- 
  

  

  