﻿566 
  COLLECTIONS 
  FEOM 
  THE 
  WESTERN 
  INDIAN 
  OCEAN. 
  

  

  2. 
  Gonodactylus 
  graphurus, 
  Iliers. 
  

  

  A 
  scries 
  of 
  specimens 
  was 
  obtained 
  at 
  the 
  Seyclielles 
  (No. 
  194) 
  

   with 
  the 
  preceding 
  species. 
  

  

  Both 
  G. 
  chiragra 
  and 
  G. 
  grajplmrus 
  are 
  referred 
  to 
  at 
  p. 
  298 
  of 
  

   this 
  Report. 
  

  

  3. 
  Gonodactylus 
  elegans. 
  (Plate 
  Lll. 
  fig. 
  B.) 
  

  

  The 
  body 
  is 
  smooth, 
  not 
  longitudinally 
  costated 
  ; 
  carapace 
  nearly 
  

   oblong, 
  without 
  spines 
  at 
  the 
  autero-lateral 
  angles. 
  Rostral 
  plato 
  

   smooth 
  and 
  somewhat 
  transverse, 
  with 
  its 
  anterior 
  margin 
  regularly 
  

   arcuated, 
  and 
  the 
  posterior 
  margin 
  straight, 
  its 
  distal 
  extremity 
  not 
  

   acute. 
  Antepenultimate 
  and 
  penultimate 
  thoracic 
  segments 
  rounded 
  

   on 
  the 
  sides, 
  and 
  the 
  former 
  but 
  little 
  laterally 
  produced 
  ; 
  the 
  last 
  

   thoracic 
  segment 
  is 
  overlapped 
  on 
  the 
  sides 
  by 
  the 
  produced 
  and 
  

   rounded 
  autero-lateral 
  lobes 
  of 
  the 
  first 
  postabdominal 
  segment. 
  

   The 
  postero-lateral 
  angles 
  of 
  the 
  fourth 
  to 
  sixth 
  postabdominal 
  seg- 
  

   ments 
  are 
  acute 
  ; 
  the 
  third 
  to 
  fifth 
  segments 
  have 
  each 
  on 
  the 
  dorsal 
  

   surface 
  five 
  small 
  pits; 
  the 
  sixth 
  segment 
  has 
  its 
  posterior 
  margin 
  

   armed 
  with 
  four 
  small 
  spines 
  (including 
  the 
  produced 
  and 
  spiniform 
  

   postero-lateral 
  angles); 
  the 
  terminal 
  segment 
  is 
  about 
  as 
  long 
  as 
  

   broad, 
  dorsally 
  nearly 
  smooth, 
  with 
  an 
  acute 
  longitudinal 
  median 
  

   carina, 
  which 
  terminates 
  posteriorly, 
  behind 
  the 
  distal 
  margin, 
  in 
  a 
  

   small 
  spinule 
  ; 
  the 
  posterior 
  margin 
  is 
  armed 
  with 
  six 
  strong 
  spines, 
  

   of 
  which 
  the 
  submedian 
  pair 
  are 
  tipped 
  with 
  a 
  small 
  mobile 
  spinule, 
  

   and 
  have 
  between 
  them 
  about 
  twenty-six 
  minute 
  sjiinules 
  ; 
  between 
  

   the 
  submedian 
  aud 
  the 
  next 
  large 
  spines 
  are 
  two 
  smaller 
  teeth, 
  and 
  

   between 
  the 
  second 
  and 
  third 
  larger 
  spines 
  one 
  smaller 
  tooth. 
  The 
  

   eye-peduncles 
  are 
  robust, 
  and 
  about 
  reach 
  to 
  the 
  distal 
  end 
  of 
  the 
  

   penultimate 
  joint 
  of 
  the 
  antennules, 
  one 
  of 
  whose 
  three 
  flagella 
  is 
  

   much 
  shorter 
  than 
  the 
  others. 
  The 
  antenna) 
  are 
  about 
  as 
  long 
  as 
  

   the 
  antennules 
  ; 
  the 
  antepenultimate 
  peduncular 
  joint 
  is 
  armed 
  with 
  

   a 
  short 
  spinule 
  ; 
  the 
  basal 
  scale 
  is 
  very 
  much 
  narrowed 
  at 
  base, 
  and 
  

   rounded 
  and 
  ciliated 
  at 
  its 
  distal 
  extremity. 
  The 
  raptorial 
  limbs 
  

   have 
  the 
  merus-joints 
  thickened 
  through 
  about 
  two 
  thirds 
  of 
  their 
  

   length, 
  and 
  thence 
  narrowing 
  distally 
  ; 
  carpus 
  and 
  penultimate 
  

   joint 
  slender 
  and 
  unarmed 
  ; 
  dactylus 
  slender 
  and 
  but 
  little 
  ventricose 
  

   at 
  base, 
  armed 
  on 
  the 
  proximal 
  half 
  of 
  its 
  inner 
  margin 
  with 
  two 
  

   teeth, 
  and 
  with 
  the 
  distal 
  extremity 
  slender 
  and 
  acute. 
  The 
  appen- 
  

   dage 
  to 
  the 
  antepenultimate 
  joint 
  of 
  the 
  three 
  posterior 
  thoracic 
  

   limbs 
  is 
  styliform, 
  slender, 
  and 
  very 
  nearly 
  as 
  long 
  as 
  the 
  penulti- 
  

   mate 
  joint. 
  The 
  postabdominal 
  uropoda 
  are 
  about 
  as 
  long 
  as 
  the 
  

   terminal 
  segment, 
  their 
  basal 
  processes 
  terminate 
  in 
  two 
  strong 
  and 
  

   nearly 
  equal 
  spines, 
  and 
  there 
  is 
  a 
  small 
  spine 
  above 
  the 
  outer 
  

   ramus, 
  which 
  latter 
  is 
  a 
  little 
  longer 
  than 
  the 
  inner 
  ramus, 
  biarti- 
  

   culate, 
  the 
  basal 
  joint 
  armed 
  on 
  its 
  outer 
  margin 
  with 
  a 
  series 
  of 
  

   strong 
  spinules 
  ; 
  the 
  inner 
  ramus 
  is 
  ovate, 
  ciliated, 
  and 
  unarmed. 
  

   Length 
  of 
  the 
  largest 
  specimen 
  about 
  11 
  lines 
  (23 
  millim.). 
  

  

  