﻿260 
  PROCEEDiyGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  gin 
  of 
  tlie 
  basal 
  joint 
  is 
  a 
  papilla 
  which 
  carries 
  a 
  long 
  seta; 
  just 
  below 
  

   this 
  are 
  two 
  rounded 
  knobs 
  covered 
  with 
  short 
  spines. 
  

  

  Color 
  a 
  dark 
  yellowish-white, 
  turning 
  to 
  lavender 
  and 
  then 
  purple 
  

   on 
  the 
  posterior 
  processes 
  and 
  the 
  dorsal 
  surface. 
  

  

  Total 
  length, 
  4.4 
  mm. 
  Cephalothorax, 
  2.5 
  mm. 
  long, 
  0.55 
  mm. 
  

   wide. 
  Posterior 
  body, 
  1.45 
  mm. 
  wide 
  at 
  the 
  posterior 
  end, 
  3 
  mm. 
  

   long, 
  including 
  the 
  posterior 
  processes 
  which 
  are 
  1 
  mm. 
  long. 
  Egg- 
  

   cases 
  1.3 
  mm. 
  long, 
  0.65 
  mm. 
  wide. 
  

  

  Male.— 
  General 
  body 
  form 
  that 
  of 
  a 
  typical 
  ClavelJa 
  male, 
  ovate^ 
  

   flattened 
  laterally, 
  a 
  little 
  pointed 
  anteriorly, 
  abruptly 
  rounded, 
  and 
  

   considerably 
  abbreviated 
  posteriorly, 
  without 
  any 
  trace 
  of 
  regions 
  

   or 
  segments. 
  The 
  entire 
  dorsal 
  surface 
  is 
  covered 
  with 
  a 
  carapace, 
  

   which 
  projects 
  a 
  little 
  over 
  the 
  anterior 
  margin, 
  forms 
  a 
  distinct 
  

   ridge 
  along 
  the 
  sides 
  of 
  the 
  body, 
  and 
  fades 
  away 
  imperceptibly 
  pos- 
  

   teriorly. 
  

  

  First 
  antennae 
  three-jointed 
  and 
  considerably 
  enlarged 
  at 
  the 
  base; 
  

   second 
  pair 
  flattened 
  and 
  laminate, 
  projecting 
  at 
  right 
  angles 
  to 
  the 
  

   edge 
  of 
  the 
  carapace, 
  about 
  the 
  same 
  length 
  as 
  the 
  first 
  pair, 
  the 
  outer, 
  

   terminal 
  ramus 
  cut 
  off 
  diagonally. 
  

  

  First 
  maxillae 
  like 
  those 
  of 
  the 
  female; 
  second 
  pair 
  ending 
  in 
  stout 
  

   curved 
  claws 
  ; 
  maxillipeds 
  with 
  a 
  strongl}^ 
  swollen 
  basal 
  joint, 
  having 
  

   on 
  its 
  ventral 
  margin 
  a 
  tooth-like 
  projection 
  with 
  which 
  the 
  tip 
  of 
  the 
  

   terminal 
  claw 
  interlocks. 
  

  

  Color 
  a 
  creamy 
  yellow, 
  uniform 
  all 
  over 
  the 
  body. 
  

  

  Total 
  length, 
  0.5 
  mm. 
  Greatest 
  width, 
  0.33 
  mm. 
  

  

  NaujMiis 
  larva. 
  — 
  General 
  structure 
  the 
  same 
  as 
  that 
  in 
  the 
  other 
  

   Lernseopodidai. 
  Body 
  a 
  flattened 
  ellipsoid, 
  the 
  two 
  diameters 
  in 
  the 
  

   ])roportion 
  of 
  3 
  to 
  4, 
  the 
  margins 
  evenly 
  rounded. 
  Frontal 
  gland 
  veiy 
  

   large 
  and 
  situated 
  far 
  forward 
  near 
  the 
  anterior 
  margin; 
  no 
  other 
  

   internal 
  structures 
  visible 
  except 
  the 
  muscles 
  which 
  move 
  the 
  append- 
  

   ages. 
  Of 
  these 
  latter 
  there 
  are 
  only 
  two 
  pairs, 
  corresponding 
  to 
  the 
  

   first 
  and 
  second 
  antennae. 
  The 
  first 
  pair 
  are 
  one-jointed, 
  uniramose, 
  

   and 
  tipped 
  with 
  two 
  long 
  setae; 
  the 
  second 
  pair 
  are 
  biramose, 
  the 
  

   exopod 
  five-jointed, 
  each 
  joint 
  terminating 
  in 
  a 
  long 
  seta, 
  the 
  endopod 
  

   two-jointed, 
  and 
  terminating 
  in 
  two 
  setae. 
  At 
  the 
  posterior 
  end 
  of 
  

   the 
  body 
  there 
  are 
  no 
  balancers, 
  but 
  instead 
  a 
  large 
  rounded 
  knob, 
  

   made 
  up 
  of 
  the 
  fused 
  thorax 
  and 
  abdomen. 
  

  

  The 
  entire 
  body 
  is 
  uncolored 
  except 
  six 
  isolated 
  patches 
  of 
  dark 
  

   lavender 
  or 
  purple 
  pigment. 
  The 
  first 
  two 
  pairs 
  are 
  situated 
  on 
  

   either 
  side 
  of 
  and 
  close 
  to 
  the 
  eye, 
  the 
  remaining 
  and 
  largest 
  pair 
  at 
  

   the 
  posterior 
  corners 
  of 
  the 
  body. 
  

  

  (laciniata, 
  cut 
  into 
  deep 
  and 
  irregular 
  lobes, 
  alluding 
  to 
  the 
  poste- 
  

   rior 
  processes.) 
  

  

  This 
  species 
  was 
  briefly 
  described 
  and 
  figured 
  by 
  Kr0yer 
  in 
  1863 
  

   (p. 
  308, 
  pi. 
  16, 
  fig. 
  8a 
  to 
  6), 
  and 
  has 
  never 
  been 
  seen 
  by 
  subsequent 
  

  

  