﻿NO. 
  1950. 
  CRUSTACEAN 
  PARASITES 
  OF 
  FISH 
  AND 
  CRABS— 
  WILSON. 
  213 
  

  

  margin. 
  Egg-strings 
  half 
  the 
  entire 
  length, 
  each 
  one-third 
  wider 
  

   than 
  the 
  abdomen 
  and 
  containing 
  20 
  to 
  25 
  eggs. 
  

  

  First 
  antennae 
  short, 
  not 
  reaching 
  the 
  lateral 
  margin 
  of 
  the 
  cara- 
  

   pace; 
  second 
  pair 
  with 
  a 
  stout 
  basal 
  joint 
  but 
  a 
  weak 
  and 
  slender 
  

   terminal 
  claw. 
  Maxillary 
  hooks 
  minute, 
  with 
  an 
  inflated 
  circular 
  

   base 
  and 
  a 
  very 
  short 
  tip; 
  fu-st 
  maxillae 
  long, 
  wide, 
  and 
  bluntly 
  

   rounded 
  at 
  the 
  tip, 
  projecting 
  well 
  beyond 
  the 
  mouth 
  tube, 
  which 
  is 
  

   short 
  and 
  wide. 
  Maxillipeds 
  mth 
  a 
  stout 
  basal 
  joint 
  bearing 
  an 
  

   enormous 
  broad 
  spine 
  on 
  its 
  inner 
  margin 
  and 
  a 
  much 
  smaller 
  sec- 
  

   ondary 
  one 
  at 
  its 
  base. 
  Tlie 
  point 
  of 
  the 
  terminal 
  claw, 
  which 
  is 
  

   stout 
  and 
  less 
  than 
  half 
  the 
  length 
  of 
  the 
  basal 
  joint, 
  shuts 
  in 
  between 
  

   the 
  two 
  spines. 
  Furca 
  stout, 
  contracted 
  at 
  the 
  center 
  and 
  enlarged 
  

   at 
  either 
  end, 
  the 
  rami 
  broadly 
  laminate, 
  bluntly 
  rounded, 
  and 
  nearly 
  

   straight. 
  

  

  Exopod 
  of 
  the 
  second 
  swimming 
  legs 
  shorter 
  than 
  the 
  endopod 
  and 
  

   armed 
  with 
  very 
  long 
  and 
  acuminate 
  spines; 
  rami 
  of 
  third 
  legs 
  well 
  

   separated, 
  exopod 
  long 
  and 
  narrow 
  with 
  a 
  medium-sized 
  bluntly 
  

   pointed 
  spine; 
  fourth 
  legs 
  stout, 
  the 
  three 
  terminal 
  joints 
  nearly 
  as 
  

   wide 
  as 
  the 
  basal, 
  the 
  five 
  spines 
  subequal; 
  fifth 
  legs 
  each 
  tipped 
  with 
  

   two 
  spines. 
  

  

  Color 
  a 
  uniform 
  white, 
  without 
  pigment 
  markings 
  of 
  any 
  sort. 
  

  

  Total 
  length, 
  4.2 
  mm. 
  Carapace, 
  2 
  mm. 
  long, 
  2 
  mm. 
  wide. 
  Geni- 
  

   tal 
  segment, 
  1.1 
  mm. 
  long, 
  1.3 
  mm. 
  wide. 
  Abdomen, 
  1 
  mm. 
  long, 
  

   0.27 
  mm. 
  wide. 
  Egg-strings, 
  2 
  mm. 
  long. 
  The 
  females 
  from 
  Caranx 
  

   cry 
  SOS 
  had 
  a 
  total 
  length 
  of 
  7 
  mm., 
  with 
  the 
  other 
  measurements 
  in 
  

   proportion. 
  

  

  Male. 
  — 
  Carapace 
  and 
  free 
  segment 
  similar 
  to 
  those 
  of 
  the 
  female, 
  

   the 
  former 
  a 
  little 
  more 
  than 
  half 
  the 
  entire 
  length. 
  Genital 
  segment 
  

   less 
  than 
  a 
  third 
  the 
  width 
  of 
  the 
  carapace, 
  barrel-shaped, 
  with 
  

   strongly 
  convex 
  sides 
  and 
  short 
  posterior 
  lobes; 
  fifth 
  and 
  sixth 
  legs 
  

   both 
  present, 
  the 
  former 
  just 
  behind 
  the 
  center 
  of 
  the 
  lateral 
  margins, 
  

   the 
  latter 
  forming 
  the 
  posterior 
  lobes. 
  

  

  Abdomen 
  two-jointed 
  but 
  with 
  the 
  terminal 
  joint 
  tlu^ee 
  times 
  the 
  

   length 
  of 
  the 
  basal; 
  anal 
  laminae 
  large 
  and 
  inclined 
  toward 
  each 
  other, 
  

   each 
  tipped 
  with 
  three 
  long 
  setSB 
  and 
  a 
  fourth 
  shorter 
  one 
  on 
  the 
  

   outer 
  margin. 
  Appendages 
  like 
  those 
  of 
  the 
  female 
  without 
  even 
  the 
  

   customary 
  differences 
  in 
  the 
  second 
  antennae, 
  maxillary 
  hooks, 
  and 
  

   maxillipeds. 
  

  

  Color 
  like 
  the 
  female. 
  

  

  Total 
  length, 
  2.64 
  mm. 
  Carapace, 
  1.35 
  mm. 
  long, 
  1.36 
  mm. 
  wide. 
  

   Genital 
  segment, 
  0.43 
  mm. 
  long 
  and 
  the 
  same 
  width. 
  

  

  Bassett-Smith's 
  original 
  specimens 
  were 
  obtained 
  from 
  the 
  oper- 
  

   culum 
  or 
  gill 
  rays 
  of 
  various 
  species 
  of 
  Caranx 
  and 
  Thynnus 
  from 
  the 
  

   Indian 
  Ocean, 
  The 
  specimens 
  from 
  the 
  red-mouthed 
  grunt 
  are 
  

   much 
  smaller 
  than 
  his 
  but 
  there 
  can 
  be 
  no 
  doubt 
  they 
  are 
  the 
  same 
  

  

  