﻿354 
  H. 
  J. 
  HANSEN. 
  

  

  near 
  each 
  other 
  and 
  in 
  the 
  posterior 
  part 
  of 
  the 
  area, 
  but 
  

   from 
  its 
  anterior 
  (lower) 
  portion 
  a 
  broad, 
  low 
  protuberance 
  

   (fig. 
  2 
  g, 
  p) 
  is 
  directed 
  downwards, 
  the 
  lower 
  rounded 
  or 
  

   rather 
  truncate 
  end 
  of 
  which 
  protrudes 
  freely 
  and 
  conceals 
  

   the 
  anterior 
  (lower) 
  margin 
  of 
  the 
  area 
  itself 
  and 
  a 
  small 
  

   portion 
  of 
  the 
  skin 
  in 
  advance 
  of 
  that 
  area. 
  The 
  receptacula 
  

   seminis 
  (fig. 
  2 
  g, 
  r) 
  are 
  very 
  long, 
  slender, 
  sausage-shaped, 
  

   and 
  very 
  curved, 
  situated 
  beneath 
  the 
  middle 
  of 
  the 
  area, 
  

   and 
  their 
  entrances, 
  which 
  could 
  not 
  be 
  distinguished 
  with 
  

   certainty, 
  must 
  be 
  rather 
  near 
  the 
  genital 
  apertures. 
  The 
  

   caudal 
  stylets 
  (fig. 
  2 
  g, 
  st) 
  are 
  completely 
  fused 
  with 
  each 
  

   other 
  in 
  nearly 
  their 
  whole 
  length. 
  

  

  Male. 
  — 
  Unknown, 
  

  

  Ovisacs. 
  — 
  As 
  in 
  Spha3ronella, 
  and 
  deposed 
  freely. 
  

  

  Larva 
  and 
  Post-larval 
  Development. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  The 
  upper 
  posterior 
  space 
  between 
  the 
  shells 
  

   of 
  Ostracoda, 
  hitherto 
  found 
  only 
  at 
  New 
  Zealand. 
  

  

  Remarks. 
  — 
  Unfortunately 
  only 
  the 
  female 
  and 
  the 
  ovisacs 
  

   of 
  one 
  species 
  are 
  known, 
  while 
  the 
  male 
  is 
  unknown. 
  The 
  

   female 
  is 
  similar 
  and 
  closely 
  allied 
  to 
  the 
  rich 
  genus 
  

   Sphaeronella, 
  but 
  differs 
  in 
  the 
  following 
  features: 
  the 
  

   fusion 
  of 
  the 
  caudal 
  stylets, 
  the 
  genital 
  area 
  being 
  furnished 
  

   with 
  a 
  large 
  protuberance, 
  and 
  the 
  sausage-shaped, 
  strongly 
  

   curved 
  receptacula 
  seminis. 
  Besides, 
  the 
  habitation 
  of 
  the 
  

   parasite 
  on 
  Ostracoda 
  is 
  a 
  most 
  remarkable 
  feature. 
  

  

  Sphasronellopsis 
  littoralis, 
  n. 
  sp. 
  

   PL 
  22, 
  figs. 
  2a— 
  2g. 
  

  

  Female. 
  — 
  The 
  largest 
  specimen 
  (fig. 
  2 
  h), 
  which 
  scarcely 
  

   had 
  begun 
  to 
  deposit 
  ovisacs, 
  measured 
  "57 
  mm. 
  in 
  length 
  to 
  

   the 
  end 
  of 
  the 
  projecting 
  mouth 
  and 
  "41 
  mm. 
  in 
  breadth, 
  but 
  

   the 
  body 
  was 
  rather 
  depressed 
  ; 
  another 
  similarly 
  depressed 
  

   female 
  (fig. 
  2 
  a), 
  found 
  together 
  with 
  eight 
  ovisacs 
  and 
  with 
  

   a 
  much 
  smaller 
  half 
  evacuated 
  female, 
  measured 
  '48 
  in 
  length 
  

  

  