﻿646 
  COLLECTIONS 
  FEOM 
  THE 
  WESTEEN 
  INDIAN 
  OCEAN. 
  

  

  66. 
  Xanthasia 
  murigera, 
  White. 
  

  

  An 
  adult 
  female 
  and 
  small 
  male 
  from 
  Mozambique, 
  obtained 
  on 
  

   the 
  beach 
  (No. 
  237), 
  agree 
  in 
  all 
  particulars 
  with 
  White's 
  typical 
  

   specimens 
  in 
  the 
  British-Museum 
  collection 
  from 
  the 
  Philippines 
  

   (Cuminc/), 
  and 
  with 
  a 
  series 
  of 
  specimens 
  from 
  the 
  'Herald' 
  collec- 
  

   tion, 
  without 
  indication 
  of 
  locality, 
  but 
  labelled 
  as 
  " 
  parasitic 
  on 
  

   Tridaoia.'" 
  Dana 
  records 
  this 
  curious 
  species 
  from 
  the 
  Fijis 
  (Vanua 
  

   Levu), 
  and 
  A. 
  Milne-Edwards 
  from 
  New 
  Caledonia 
  ; 
  its 
  occurrence 
  

   at 
  the 
  western 
  limit 
  of 
  the 
  Indo-Pacific 
  Region 
  is 
  now, 
  I 
  believe, 
  

   recorded 
  for 
  the 
  first 
  time. 
  

  

  67. 
  PMlyra 
  rectangularis. 
  (Plate 
  XLIX. 
  fig. 
  A.) 
  

  

  Carapace 
  of 
  somewhat 
  rhomboidal 
  form, 
  depressed, 
  about 
  as 
  broad 
  

   as 
  long, 
  with 
  the 
  angles 
  at 
  the 
  junction 
  of 
  the 
  antero-lateral 
  and 
  

   postero-lateral 
  margins 
  rounded 
  ; 
  its 
  dorsal 
  surface 
  is 
  everywhere 
  

   uniformly 
  and 
  very 
  distinctly 
  punctated 
  ; 
  the 
  front 
  projects 
  but 
  

   little, 
  and 
  its 
  anterior 
  margin 
  is 
  slightly 
  concave. 
  The 
  pterygo- 
  

   stomian 
  regions 
  are 
  slightly 
  angulated 
  ; 
  the 
  posterior 
  margin 
  of 
  the 
  

   carapace 
  projects 
  somewhat 
  and 
  is 
  perfectly 
  straight, 
  the 
  postero- 
  

   lateral 
  angles 
  being 
  right 
  angles. 
  The 
  eyes 
  project 
  slightly 
  from 
  

   the 
  orbits, 
  whose 
  tapper 
  margins 
  are 
  marked 
  with 
  a 
  fissure 
  ; 
  the 
  

   exognath 
  of 
  the 
  outer 
  masillipedes 
  is 
  nearly 
  as 
  broad 
  as 
  the 
  ischium- 
  

   joint 
  of 
  the 
  endognath, 
  and 
  reaches 
  nearly 
  to 
  the 
  acute 
  distal 
  end 
  

   of 
  the 
  merus-joint. 
  The 
  chelipedes 
  (in 
  the 
  female) 
  are 
  of 
  moderate 
  

   length 
  and 
  slender 
  ; 
  the 
  arm 
  or 
  merus-joint 
  is 
  granulated 
  both 
  

   above 
  and 
  below, 
  but 
  more 
  thickly 
  on 
  its 
  inferior 
  surface 
  ; 
  its 
  mar- 
  

   gins 
  are 
  not 
  distinctly 
  angulated 
  ; 
  the 
  palm 
  and 
  wrist 
  are 
  minutely 
  

   punctated 
  on 
  their 
  iipper 
  and 
  lower 
  surfaces, 
  and 
  are 
  granulated 
  on 
  

   their 
  outer 
  (or 
  posterior) 
  margins 
  ; 
  the 
  fingers 
  are 
  more 
  than 
  half 
  as 
  

   long 
  as 
  the 
  palms, 
  straight, 
  acute, 
  and 
  are 
  not 
  denticulated 
  on 
  their 
  

   inner 
  margins 
  ; 
  the 
  ambulatory 
  legs 
  small 
  and 
  slender, 
  with 
  the 
  

   dactyli 
  longer 
  than 
  the 
  preceding 
  joints. 
  The 
  colour 
  (in 
  spirit) 
  is 
  

   light 
  yellowish 
  brown, 
  carapace 
  and 
  chelipedes 
  being 
  punctulated 
  

   with 
  dusky 
  grey. 
  Length 
  of 
  carapace 
  (of 
  the 
  female) 
  under 
  3 
  lines 
  

   (nearly 
  6 
  millim.). 
  

  

  A 
  single 
  female 
  was 
  collected 
  at 
  the 
  Seychelles, 
  4-12 
  fms.(No. 
  194). 
  

   The 
  abdomen 
  in 
  this 
  specimen 
  has 
  all 
  the 
  segments, 
  except 
  the 
  first 
  

   two 
  and 
  the 
  last, 
  coalescent. 
  

  

  This 
  species 
  is 
  distinguished 
  from 
  nearly 
  all 
  of 
  its 
  congeners 
  with 
  

   which 
  I 
  am 
  acquainted 
  by 
  the 
  straight 
  posterior 
  margin 
  of 
  the 
  

   carapace, 
  with 
  its 
  prominent 
  postero-lateral 
  angles. 
  Phih/ra 
  tu- 
  

   Lercuhsa, 
  8timpson 
  *, 
  from 
  Hong-Kong, 
  which 
  it 
  resembles 
  in 
  this 
  

   character, 
  has 
  the 
  branchial, 
  post-gastric, 
  and 
  genital 
  regions 
  of 
  the 
  

   carapace 
  tuberculated. 
  Philyra 
  hevidorsalis, 
  Miers, 
  from 
  Goree 
  t, 
  

  

  * 
  Proc. 
  Acad. 
  Kat. 
  Sci. 
  Philad. 
  p. 
  160 
  (1860). 
  

  

  t 
  Ann. 
  & 
  Mag. 
  Nat. 
  Hist. 
  ser. 
  5, 
  viii. 
  p. 
  264, 
  pi. 
  iv. 
  fig. 
  2 
  (1881). 
  

  

  