﻿CEUSTACEA. 
  547 
  

  

  also 
  has 
  a 
  straight 
  posterior 
  margin 
  to 
  the 
  carapace, 
  but 
  the 
  postero- 
  

   lateral 
  angles 
  are 
  not 
  prominent, 
  and 
  the 
  chelipedes 
  are 
  of 
  very- 
  

   different 
  form 
  ; 
  these 
  characters 
  will 
  also 
  apply 
  to 
  P. 
  carmata. 
  Bell, 
  

   and 
  another 
  apparently 
  undescribed 
  species 
  in 
  the 
  Museum 
  collec- 
  

   tion 
  from 
  Peuang 
  (Dr. 
  Cantor), 
  which 
  is 
  allied 
  to 
  P. 
  carmata, 
  but 
  

   has 
  a 
  more 
  granulated 
  carapace, 
  a 
  distinctly 
  tridentate 
  front, 
  the 
  

   lateral 
  margins 
  of 
  the 
  carapace 
  bounded 
  by 
  a 
  sharp 
  cristiform 
  line 
  

   marked 
  at 
  intervals 
  bj- 
  small 
  granuliform 
  teeth, 
  and 
  much 
  slenderer 
  

   chelipedes, 
  the 
  palms 
  of 
  which 
  are 
  not 
  distinctly 
  granulated. 
  This 
  

   species, 
  which 
  only 
  differs 
  from 
  Pseudophilyra 
  in 
  its 
  less 
  prominent 
  

   front, 
  I 
  will 
  designate 
  as 
  Pliilyra 
  rudis. 
  

  

  68, 
  PsendopMlyra 
  polita. 
  (Plate 
  XLIX. 
  fig. 
  B.) 
  

  

  In 
  this 
  little 
  species 
  the 
  carapace 
  is 
  subrhomboidal, 
  but 
  (with 
  the 
  

   front) 
  much 
  longer 
  than 
  broad, 
  slightly 
  sinuated 
  at 
  the 
  hepatic 
  

   regions 
  ; 
  the 
  posterior 
  margin 
  nearly 
  straight, 
  but 
  without 
  promi- 
  

   nent 
  postero-lateral 
  angles, 
  the 
  antero-lateral 
  margins 
  with 
  a 
  series 
  

   of 
  very 
  distinct 
  granules, 
  which 
  is 
  continued 
  for 
  a 
  short 
  distance 
  

   along 
  the 
  postero-lateral 
  margins 
  ; 
  the 
  posterior 
  margin 
  is 
  defined 
  

   by 
  a 
  minutely 
  granulated 
  line 
  ; 
  the 
  frontal 
  or 
  cephalic 
  region 
  is 
  very 
  

   prominent, 
  the 
  front 
  obscurely 
  trilobate 
  ; 
  the 
  median 
  lobe 
  distinct 
  

   and 
  slightly 
  deflexed, 
  but 
  the 
  lateral 
  lobes 
  nearly 
  obsolete 
  ; 
  the 
  

   dorsal 
  surface 
  is 
  polished, 
  and 
  only 
  very 
  minutely 
  punctulated. 
  

   There 
  is 
  no 
  distinct 
  thoracic 
  sinus, 
  but 
  one 
  or 
  two 
  tubercles 
  near 
  

   the 
  base 
  of 
  the 
  chelipedes. 
  The 
  postabdomen 
  (in 
  the 
  male) 
  has 
  all 
  

   the 
  segments 
  (except 
  the 
  first 
  and 
  last) 
  coalescent 
  ; 
  the 
  eyes 
  are 
  

   very 
  small 
  and 
  lie 
  well 
  within 
  the 
  nearly 
  tubular 
  orbits, 
  which 
  

   have 
  an 
  external 
  fissure 
  and 
  an 
  internal 
  hiatus 
  for 
  the 
  reception 
  of 
  

   the 
  small 
  antennee. 
  The 
  outer 
  maxillipedes 
  have 
  the 
  merus 
  as 
  long 
  

   as 
  or 
  rather 
  longer 
  than 
  the 
  ischium-joint, 
  acute 
  at 
  its 
  distal 
  ex- 
  

   tremity, 
  near 
  to 
  which 
  its 
  margins 
  are 
  granulated 
  ; 
  the 
  exognath 
  

   broad, 
  with 
  its 
  outer 
  margin 
  somewhat 
  arcuated 
  and 
  its 
  distal 
  end 
  

   obtuse, 
  the 
  margins 
  granulated, 
  except 
  towards 
  the 
  base. 
  The 
  

   chelipedes 
  are 
  rather 
  short 
  and 
  somewhat 
  triquetrous, 
  with 
  the 
  

   margins 
  very 
  strongly 
  granulated, 
  as 
  are 
  also 
  the 
  upper 
  and 
  the 
  

   anterior 
  faces 
  toward 
  the 
  base 
  ; 
  on 
  the 
  inferior 
  surface 
  of 
  the 
  

   arm 
  the 
  granules 
  are 
  smaller 
  and 
  more 
  crowded 
  ; 
  palm 
  and 
  wrist 
  

   nearly 
  smooth 
  ; 
  the 
  palm 
  subcristato 
  on 
  its 
  upper 
  and 
  granulated 
  

   on 
  its 
  lower 
  margin 
  ; 
  fingers 
  about 
  as 
  long 
  as 
  the 
  palm, 
  slightly 
  

   incurved 
  at 
  the 
  tips, 
  with 
  a 
  slight 
  hiatus 
  between 
  them 
  when 
  closed. 
  

   Ambulatory 
  legs 
  with 
  the 
  merus-joints 
  more 
  or 
  less 
  distinctly 
  

   granulated 
  on 
  their 
  lower 
  margins. 
  Colour 
  (in 
  spirit) 
  yellowish 
  

   white. 
  Length 
  of 
  the 
  only 
  specimen 
  nearly 
  4 
  Hues 
  (8 
  millim.) 
  ; 
  

   breadth 
  rather 
  over 
  3 
  lines 
  (7 
  millim.), 
  which 
  is 
  also 
  the 
  length 
  

   of 
  the 
  chelipede 
  when 
  extended 
  as 
  far 
  as 
  its 
  conformation 
  will 
  

   allow. 
  

  

  A 
  male 
  is 
  in 
  the 
  collection 
  from 
  Poivre 
  Island 
  or 
  He 
  des 
  Roches, 
  

   dredged 
  in 
  13-20 
  fms. 
  (No. 
  183). 
  

  

  2n 
  2 
  

  

  