﻿196 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  voi,. 
  44. 
  

  

  A 
  single 
  female 
  was 
  found 
  on 
  the 
  gills 
  of 
  a 
  tobacco 
  fish, 
  Aleutera 
  

   sa-ipta, 
  but 
  as 
  this 
  fish 
  had 
  been 
  tumbled 
  into 
  the 
  boat 
  mth 
  the 
  

   sheepsheads 
  the 
  copepod 
  })robably 
  got 
  on 
  to 
  it 
  in 
  some 
  way 
  from 
  the 
  

   latter. 
  This 
  single 
  specimen 
  is 
  numbered 
  42257, 
  U.S.N.M. 
  

  

  Type-specimen. 
  — 
  A 
  female, 
  Cat. 
  No. 
  43590, 
  U.S.N.M. 
  Paratypes, 
  

   Cat. 
  No. 
  42253, 
  U.S.N.M. 
  

  

  Female. 
  — 
  General 
  body 
  form 
  rather 
  short 
  and 
  stout; 
  carapace 
  

   twice 
  as 
  wide 
  as 
  long, 
  squarely 
  truncated 
  posteriorly 
  and 
  with 
  a 
  

   shallow 
  notch 
  at 
  the 
  center 
  of 
  the 
  frontal 
  margin. 
  Second, 
  third, 
  

   and 
  fourth 
  segments 
  subequal 
  in 
  length, 
  but 
  diminishing 
  regularly 
  in 
  

   width. 
  Second 
  segment 
  one-third 
  narrower 
  than 
  the 
  carapace, 
  leav- 
  

   ing 
  the 
  firet 
  legs 
  visible 
  on 
  either 
  side; 
  a 
  part 
  of 
  the 
  basal 
  joints 
  as 
  

   well 
  as 
  the 
  rami 
  of 
  the 
  other 
  swimming 
  legs 
  visible 
  dors 
  ally. 
  Fifth 
  

   segment 
  the 
  same 
  length 
  as 
  the 
  fourth 
  and 
  only 
  a 
  little 
  narrower; 
  

   genital 
  segment 
  the 
  same 
  width 
  as 
  the 
  fifth 
  segment 
  and 
  rather 
  short, 
  

   with 
  convex 
  sides. 
  

  

  Abdomen 
  two-jointed, 
  the 
  basal 
  joint 
  wider 
  but 
  shorter 
  than 
  the 
  

   terminal; 
  anal 
  laminae 
  small 
  and 
  rectangular, 
  each 
  tipped 
  with 
  a 
  

   long 
  inner 
  seta, 
  a 
  shorter 
  outer 
  one, 
  and 
  two 
  spines, 
  one 
  at 
  the 
  outer 
  

   distal 
  corner, 
  the 
  other 
  at 
  the 
  center 
  of 
  the 
  outer 
  border. 
  

  

  Egg- 
  strings 
  four-sevenths 
  of 
  the 
  entire 
  length, 
  the 
  same 
  width 
  as 
  

   the 
  genital 
  segment, 
  and 
  slightly 
  narrowed 
  at 
  the 
  posterior 
  end 
  ; 
  eggs 
  

   in 
  five 
  or 
  six 
  longitudinal 
  rows, 
  from 
  15 
  to 
  16 
  eggs 
  in 
  each 
  row. 
  

  

  First 
  antennae 
  prominent; 
  basal 
  portion 
  considerably 
  widened 
  and 
  

   strongly 
  arched, 
  carrying 
  two 
  long 
  tactile 
  setaB 
  toward 
  its 
  distal 
  end. 
  

   Second 
  pair 
  large 
  and 
  stout, 
  the 
  terminal 
  joint 
  tipped 
  with 
  two 
  large 
  

   finger-like 
  processes, 
  one 
  dorsal 
  and 
  considerably 
  smaller, 
  the 
  other 
  

   ventral, 
  and 
  between 
  them 
  two 
  long, 
  curved 
  claws 
  and 
  a 
  straight 
  

   spine. 
  A 
  row 
  of 
  bluntly 
  rounded 
  comb 
  teeth 
  runs 
  along 
  the 
  anterior 
  

   margin 
  of 
  each 
  finger 
  process 
  and 
  on 
  to 
  the 
  joint 
  itself; 
  the 
  row 
  from 
  

   the 
  dorsal 
  process 
  stops 
  at 
  about 
  the 
  center 
  of 
  the 
  joint 
  while 
  that 
  

   from 
  the 
  ventral 
  process 
  runs 
  the 
  whole 
  length 
  of 
  the 
  anterior 
  margin 
  

   of 
  the 
  joint 
  and 
  curves 
  around 
  its 
  proximal 
  end 
  to 
  the 
  posterior 
  

   margin. 
  

  

  Upper 
  lip 
  triangular, 
  nearly 
  twiiee 
  as 
  wide 
  as 
  long, 
  with 
  straight 
  

   sides 
  and 
  well 
  rounded 
  corners. 
  Mandibles 
  bent 
  sharply 
  backward 
  

   and 
  ending 
  in 
  a 
  straight 
  and 
  slender 
  spine. 
  

  

  First 
  maxiDse 
  with 
  a 
  long 
  curved 
  paragnath 
  and 
  a 
  prominent 
  knob 
  

   armed 
  with 
  three 
  plumose 
  setae, 
  of 
  which 
  the 
  two 
  mner 
  ones 
  are 
  close 
  

   together, 
  curved 
  inward 
  toward 
  the 
  midline 
  and 
  then 
  backward, 
  and 
  

   are 
  four 
  times 
  the 
  length 
  of 
  the 
  outer 
  one, 
  which 
  is 
  removed 
  a 
  little 
  

   distance 
  from 
  them 
  and 
  points 
  directly 
  backward. 
  

  

  Second 
  maxillae 
  curved 
  forward 
  and 
  inward, 
  not 
  quite 
  meeting 
  at 
  

   the 
  midline, 
  their 
  terminal 
  blades 
  armed 
  with 
  a 
  row 
  of 
  short 
  hairs 
  

   along 
  the 
  anterior 
  margin. 
  Maxillipeds 
  ^vith 
  a 
  large 
  triangular 
  basal 
  

  

  