﻿244 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  naked 
  except 
  toward 
  the 
  margins, 
  the 
  lower 
  margin 
  is 
  in 
  a 
  straight 
  

   line 
  with 
  the 
  lower 
  margin 
  of 
  the 
  immobile 
  finger 
  ; 
  the 
  fingers 
  are 
  

   little 
  shorter 
  than 
  the 
  i^alm, 
  acute 
  at 
  apices, 
  and 
  rather 
  strongly 
  den- 
  

   ticulated 
  along 
  their 
  inner 
  margins. 
  The 
  ambulator}' 
  legs 
  are 
  slender 
  

   and 
  somewhat 
  elongated, 
  the 
  dactyli 
  styliform 
  and 
  straight, 
  the 
  

   margins 
  (of 
  the 
  fifth 
  pair 
  especially) 
  aro 
  clothed 
  with 
  longish 
  

   hairs. 
  The 
  male 
  verges 
  are 
  slender; 
  their 
  bases 
  lie 
  in 
  narrow 
  

   canaliciiU, 
  which 
  are 
  partially 
  open 
  above. 
  Colour 
  (in 
  spirit) 
  light 
  

   yellowish. 
  Length 
  nearly 
  3 
  lines 
  (6 
  millim.), 
  breadth 
  about 
  3 
  lines 
  

   (6| 
  millim.). 
  

  

  The 
  single 
  male 
  in 
  the 
  collection 
  was 
  obtained 
  at 
  Port 
  Darwin, 
  at 
  

   a 
  depth 
  of 
  12 
  fms. 
  

  

  This 
  species 
  is 
  distinguished 
  from 
  Typldocarchms 
  nudus 
  and 
  

   T. 
  villosus, 
  Stimpson, 
  by 
  the 
  form 
  of 
  the 
  merus-joint 
  of 
  the 
  outer 
  

   maxillipedes 
  and 
  the 
  acute 
  anterior 
  margins 
  of 
  the 
  ocular 
  peduncles, 
  

   in 
  which 
  characters 
  it 
  agrees 
  with 
  Ceratojilax 
  ; 
  in 
  the 
  form 
  of 
  the 
  

   carapace 
  and 
  the 
  structure 
  of 
  the 
  antennae 
  it 
  agrees 
  better 
  with 
  

   Typhlocarcimis 
  ; 
  but 
  the 
  very 
  name 
  of 
  the 
  latter 
  genus 
  prevents 
  my 
  

   assigning 
  to 
  it 
  a 
  species 
  which 
  has 
  the 
  organs 
  of 
  vision 
  normally 
  

   developed. 
  Both 
  this 
  and 
  the 
  following 
  species 
  must, 
  I 
  think, 
  be 
  

   regarded 
  as 
  intermediate 
  forms 
  between 
  Typhlocarcinus 
  and 
  Cerato- 
  

   jplax. 
  The 
  fifth 
  ambulatory 
  legs 
  are 
  much 
  shorter 
  than 
  the 
  pre- 
  

   ceding, 
  as 
  in 
  Astlienognatlms 
  incequipes, 
  Stm. 
  : 
  but, 
  unlike 
  that 
  

   species, 
  the 
  ambulatory 
  legs 
  are 
  all 
  very 
  slender. 
  

  

  Rhizopa 
  <jracilipes, 
  Stimpson, 
  to 
  which 
  this 
  species 
  is 
  nearly 
  allied, 
  

   is 
  described 
  as 
  having 
  minute 
  eyes, 
  a 
  straight 
  frontal 
  margin, 
  a 
  

   strong 
  median 
  frontal 
  suture, 
  and 
  glabrous 
  chelae. 
  

  

  88- 
  Ceratoplax 
  ? 
  laevis. 
  (Plate 
  XXV. 
  fig. 
  C.) 
  

  

  In 
  this 
  species 
  the 
  carapace 
  is 
  transverse, 
  smooth 
  and 
  shining, 
  lon- 
  

   gitudinally 
  moderately 
  convex, 
  with 
  only 
  a 
  very 
  few 
  punctulations 
  ; 
  

   the 
  front 
  somewhat 
  deflexed, 
  more 
  than 
  one 
  third 
  the 
  width 
  of 
  the 
  

   carapace, 
  entire, 
  with 
  an 
  indistinct 
  transverse 
  line 
  of 
  scanty 
  hairs 
  

   across 
  its 
  upper 
  surface 
  ; 
  the 
  antcro-lateral 
  margins 
  aro 
  much 
  shorter 
  

   than 
  the 
  postcro-lateral, 
  acute, 
  entire, 
  and 
  bordered 
  with 
  a 
  few 
  hairs 
  ; 
  

   the 
  postero-lateral 
  margins 
  are 
  straight 
  and 
  convergent 
  to 
  the 
  pos- 
  

   terior 
  margin. 
  The 
  orbital 
  margins 
  are 
  entire, 
  the 
  orbits 
  widest 
  

   internally. 
  The 
  epistoma 
  is 
  very 
  narrow-transverse. 
  There 
  are 
  no 
  

   longitudinal 
  ridges 
  on 
  the 
  endostome 
  or 
  palate. 
  The 
  postabdominal 
  

   segments 
  (in 
  what 
  appears 
  to 
  be 
  the 
  young 
  female) 
  are 
  all 
  of 
  them 
  

   distinct 
  and 
  all 
  narrow 
  except 
  the 
  last, 
  which 
  reaches 
  to 
  the 
  bases 
  

   of 
  the 
  fifth 
  ambulatory 
  legs. 
  The 
  eye-peduncles 
  are 
  thick 
  and 
  hairy 
  

   above 
  the 
  corneas, 
  distinct, 
  and 
  black 
  ; 
  the 
  basal 
  antennal 
  joint 
  

   which 
  is 
  of 
  moderate 
  size, 
  reaches 
  to 
  the 
  subfrontal 
  lobe 
  (see 
  fig. 
  c). 
  

   The 
  ischium-joint 
  of 
  the 
  outer 
  maxillipedes 
  is 
  little 
  longer 
  than 
  

   broad 
  ; 
  the 
  mcrus 
  is 
  transverse, 
  with 
  its 
  antero-external 
  angle 
  pro- 
  

   minent 
  and 
  rounded 
  ; 
  there 
  is 
  no 
  notch 
  at 
  the 
  antero-internal 
  angle. 
  

   The 
  chelipedes 
  are 
  subequal 
  and 
  of 
  moderate 
  size 
  ; 
  the 
  merus 
  short 
  

   and 
  trigonous, 
  with 
  a 
  strong 
  tooth 
  near 
  the 
  distal 
  end 
  of 
  its 
  upper 
  

  

  