﻿NO. 
  1950. 
  CRUSTACEAN 
  PARASITES 
  OF 
  FISH 
  AND 
  CRABS— 
  WILSON. 
  243 
  

  

  glands 
  are 
  long 
  and 
  slender, 
  the 
  glandular 
  portion 
  one-third 
  of 
  their 
  

   entire 
  length. 
  Color 
  similar 
  to 
  that 
  of 
  H. 
  linearis 
  from 
  the 
  red- 
  

   mouthed 
  grunt. 
  (See 
  p. 
  247.) 
  Head 
  yellowish 
  with 
  a 
  faint 
  tinge 
  of 
  

   brown, 
  more 
  noticeable 
  on 
  the 
  chitin 
  ribs 
  and 
  the 
  thicker 
  portions 
  

   of 
  the 
  integument; 
  free 
  thorax 
  and 
  genital 
  segment 
  with 
  yellow 
  

   margins 
  tinged 
  with 
  olive-green; 
  inside 
  of 
  these 
  the 
  long 
  oviducts 
  

   are 
  yellowish 
  anteriorly, 
  then 
  become 
  light 
  brown 
  and 
  eventually 
  

   dark 
  cinnamon-brown 
  posteriorly; 
  the 
  central 
  line 
  over 
  the 
  intestine 
  

   yellowish 
  with 
  orange 
  margins; 
  egg-strings 
  dark 
  cinnamon-brown. 
  

   There 
  are 
  none 
  of 
  the 
  dark 
  red 
  streaks 
  through 
  the 
  head 
  and 
  free 
  

   thorax 
  so 
  prominent 
  in 
  linearis. 
  

  

  Total 
  length, 
  1.70 
  mm. 
  Carapace, 
  0.36 
  mm. 
  wide, 
  0.27 
  mm. 
  

   long. 
  Fused 
  thorax, 
  1.27 
  mm. 
  long, 
  0.36 
  mm. 
  wide. 
  Egg-strings, 
  

   0.82 
  mm. 
  long, 
  0.145 
  mm. 
  wide. 
  

  

  (ohlongus, 
  oblong.) 
  

  

  This 
  species 
  may 
  be 
  distinguished 
  by 
  its 
  oblong 
  form, 
  its 
  small 
  

   elliptical 
  carapace 
  of 
  the 
  same 
  width 
  as 
  the 
  fused 
  thorax, 
  by 
  the 
  

   narrowing 
  of 
  the 
  first 
  two 
  thorax 
  segments, 
  and 
  by 
  the 
  short 
  curved 
  

   egg-strings. 
  It 
  is 
  fairly 
  common 
  on 
  the 
  red 
  snapper, 
  but 
  only 
  one 
  

   or 
  two 
  specimens 
  are 
  found 
  on 
  a 
  fish. 
  

  

  HATSCHEKIA 
  UNCATA, 
  new 
  species. 
  

   Plate 
  43. 
  

  

  Host 
  and 
  record 
  of 
  specimens. 
  — 
  A 
  dozen 
  females, 
  nearly 
  all 
  with 
  

   egg-strings, 
  were 
  obtained 
  from 
  the 
  gills 
  of 
  the 
  rock 
  hind, 
  Epinephelus 
  

   adscensionis, 
  July 
  12, 
  1910. 
  They 
  were 
  fastened 
  to 
  the 
  gill 
  filaments, 
  

   close 
  to 
  the 
  base 
  of 
  the 
  latter, 
  and 
  in 
  the 
  space 
  between 
  two 
  adjacent 
  

   fdaments, 
  in 
  such 
  a 
  way 
  that 
  their 
  bodies 
  were 
  entirely 
  concealed, 
  

   and 
  only 
  the 
  egg-strings 
  were 
  visible. 
  The 
  body 
  axis 
  was 
  at 
  right 
  

   angles 
  to 
  the 
  length 
  of 
  the 
  filament, 
  thus 
  bringing 
  the 
  egg-strings 
  

   parallel 
  with 
  the 
  latter, 
  and 
  just 
  flush 
  with 
  its 
  outer 
  surface. 
  The 
  

   dozen 
  specimens 
  were 
  obtained 
  from 
  half 
  as 
  many 
  fish. 
  

  

  Type-specimen.— 
  Qsit. 
  No. 
  43546, 
  U.S.N.M. 
  Paratypes, 
  Cat. 
  No. 
  

   42289, 
  U.S.N.M. 
  

  

  Female. 
  — 
  General 
  body 
  form 
  elliptical, 
  short 
  and 
  plump; 
  well 
  

   rounded 
  on 
  botli 
  dorsal 
  and 
  ventral 
  surfaces, 
  more 
  on 
  the 
  former 
  

   than 
  the 
  latter. 
  Carapace 
  relatively 
  large 
  and 
  semicircular, 
  one- 
  

   third 
  of 
  the 
  entire 
  length 
  and 
  one-half 
  wider 
  than 
  long; 
  the 
  frontal 
  

   and 
  lateral 
  margins 
  form 
  a 
  nearly 
  perfect 
  half 
  circle, 
  surrounded 
  

   by 
  a 
  wide 
  transparent 
  border; 
  the 
  posterior 
  margin 
  is 
  three-lobed, 
  

   the 
  lateral 
  lobes 
  narrow 
  and 
  short, 
  the 
  median 
  lobe 
  three-fifths 
  of 
  

   the 
  entire 
  width 
  and 
  strongly 
  convex. 
  The 
  anterior 
  margui 
  projects 
  

   between 
  the 
  bases 
  of 
  the 
  first 
  antennae, 
  which 
  are 
  attached 
  dorsallj^ 
  

   Fused 
  thorax 
  segments 
  broadly 
  elHptical, 
  one-fifth 
  longer 
  than 
  wide, 
  

   the 
  segments 
  indistinguishable 
  except 
  by 
  indentations 
  on 
  the 
  lateral 
  

  

  