﻿310 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  Straits 
  which 
  appears 
  to 
  merit 
  separation 
  at 
  least 
  as 
  a 
  variety, 
  which 
  

   has 
  the 
  segments 
  of 
  the 
  body, 
  the 
  postabdominal 
  process, 
  and 
  the 
  

   uropoda 
  covered 
  with 
  a 
  dense 
  golden-brown 
  pubescence 
  ; 
  the 
  process 
  

   of 
  the 
  penultimate 
  postabdominal 
  segment 
  very 
  long, 
  reaching 
  nearly 
  

   to 
  the 
  extremity 
  of 
  the 
  outer 
  ramus 
  of 
  the 
  uropoda, 
  and 
  obscurely 
  

   emarginato 
  at 
  its 
  distal 
  extremity 
  ; 
  the 
  outer 
  ramus 
  straight, 
  sub- 
  

   acute, 
  and 
  entire, 
  the 
  inner 
  represented 
  by 
  a 
  short 
  but 
  distinct 
  

   process 
  of 
  the 
  base 
  ; 
  the 
  notch 
  in 
  the 
  terminal 
  segment 
  deep, 
  with 
  a 
  

   prominent 
  triangulate 
  median 
  process. 
  This 
  I 
  wiU 
  designate 
  

   C. 
  latreiJlei, 
  var. 
  longisphia. 
  I 
  have 
  observed 
  specimens 
  of 
  the 
  

   preceding 
  variety 
  which 
  nearly 
  resemble 
  this 
  in 
  the 
  form 
  of 
  the 
  

   terminal 
  notch 
  with 
  its 
  median 
  lobe. 
  From 
  Ciliccea 
  tenuicaudata 
  

   and 
  C. 
  crassa, 
  Haswell, 
  which 
  this 
  form 
  resembles 
  in 
  the 
  greatly 
  

   elongated 
  postabdominal 
  process, 
  it 
  is 
  distinguished 
  by 
  wanting 
  the 
  

   two 
  prominences 
  of 
  the 
  terminal 
  segment, 
  and 
  by 
  the 
  entire 
  longer 
  

   ramus 
  of 
  the 
  uropoda. 
  

  

  Ciliccea 
  antennalis 
  *, 
  from 
  Swan 
  lliver, 
  is 
  nearly 
  allied 
  to 
  Ciliccea 
  

   latreillei, 
  but 
  may 
  be 
  distinguished 
  by 
  the 
  nearly 
  smooth 
  body, 
  the 
  

   form 
  of 
  the 
  thoracic 
  segments, 
  which 
  are 
  subtruncated 
  on 
  the 
  sides, 
  

   the 
  much 
  wider, 
  shallower, 
  transverse 
  notch 
  of 
  the 
  terminal 
  seg- 
  

   ment, 
  which 
  has 
  a 
  very 
  small 
  median 
  prominence, 
  and 
  the 
  form 
  of 
  

   the 
  process 
  of 
  the 
  penultimate 
  segment, 
  which 
  projects 
  far 
  beyond 
  

   the 
  distal 
  end 
  of 
  the 
  last 
  segment, 
  is 
  vertically 
  compressed, 
  rounded 
  

   at 
  the 
  distal 
  end, 
  and 
  marked 
  with 
  a 
  longitudinal 
  median 
  groove 
  ; 
  

   the 
  median 
  froutal 
  process, 
  which 
  is 
  iiiflexed 
  and 
  lies 
  between 
  

   the 
  bases 
  of 
  the 
  antcnnules, 
  is 
  truncated 
  at 
  its 
  distal 
  end, 
  where 
  

   it 
  is 
  applied 
  to 
  the 
  anterior 
  margin 
  of 
  the 
  labrum 
  ; 
  the 
  basal 
  joint 
  

   of 
  the 
  antennules 
  is 
  considerably 
  enlarged, 
  more 
  than 
  twice 
  as 
  

   long 
  as 
  broad, 
  with 
  a 
  small 
  tubercle 
  at 
  the 
  distal 
  end 
  of 
  its 
  upper 
  

   margin 
  ; 
  the 
  next 
  joint, 
  which 
  is 
  about 
  half 
  as 
  long, 
  terminates 
  

   in 
  two 
  spines 
  below 
  the 
  point 
  of 
  articulation 
  with 
  the 
  slender 
  

   third 
  joint 
  : 
  ambulatory 
  legs 
  very 
  slender 
  ; 
  apices 
  of 
  the 
  uropoda 
  

   subtruncated 
  and 
  recurved. 
  The 
  type 
  (a 
  male) 
  measures 
  10 
  lines 
  

   (21 
  millim.) 
  from 
  the 
  front 
  of 
  the 
  head 
  to 
  the 
  end 
  of 
  the 
  postabdo- 
  

   minal 
  process. 
  

  

  The 
  genus 
  (or 
  subgenus) 
  Ciliccea, 
  I 
  may 
  note 
  in 
  conclusion, 
  is 
  

   nearly 
  allied 
  to 
  Ncesa, 
  Leach, 
  and 
  Campecopea, 
  Leach 
  ; 
  but 
  the 
  

   typical 
  species 
  of 
  Na;sa 
  have 
  the 
  last 
  segment 
  of 
  the 
  postabdomen 
  

   simply 
  notched 
  (without 
  a 
  median 
  process), 
  and 
  the 
  penultimate 
  seg- 
  

   ment 
  armed 
  with 
  two 
  or 
  three 
  dorsal 
  processes 
  or 
  spines, 
  and 
  in 
  the 
  

   typical 
  species 
  of 
  Campecopea 
  the 
  terminal 
  segment 
  is 
  entire. 
  The 
  

   distinctions 
  between 
  the 
  sexes 
  in 
  this 
  group 
  are 
  so 
  marked 
  that 
  a 
  

   considerable 
  series 
  is 
  necessary 
  and 
  a 
  careful 
  examination, 
  or 
  

   distinctions 
  which 
  are 
  merely 
  sexual 
  may 
  easily 
  be 
  taken 
  to 
  be 
  indi- 
  

   cative 
  of 
  distinct 
  species 
  or 
  even 
  genera. 
  

  

  * 
  NcBsa 
  antennalis, 
  White, 
  List 
  Crust. 
  Brit. 
  Mus. 
  p. 
  105 
  (1847) 
  (ined.). 
  

  

  