﻿568 
  COLLECTIONS 
  FROTM 
  THE 
  AVESTEEN 
  INDIAN 
  OCEAN. 
  

  

  to 
  third 
  segments 
  of 
  the 
  postabdomeii 
  have 
  their 
  posterior 
  margins 
  

   dorsally 
  armed 
  with 
  a 
  scries 
  of 
  minute 
  sjjinules 
  ; 
  the 
  first 
  segment 
  

   has 
  a 
  few 
  spimiles 
  on 
  the 
  postero-lateral 
  margin 
  above 
  the 
  postero- 
  

   lateral 
  angle 
  ; 
  in 
  the 
  second 
  segment 
  the 
  sijinnles 
  are 
  more 
  numerous, 
  

   and 
  on 
  the 
  third 
  they 
  extend 
  along 
  nearly 
  the 
  whole 
  length 
  of 
  the 
  

   postero-lateral 
  margins 
  and 
  along 
  part 
  of 
  the 
  infero-lateral 
  margins 
  

   and 
  (in 
  one 
  specimen) 
  are 
  of 
  very 
  unequal 
  length 
  ; 
  the 
  fourth 
  seg- 
  

   ment 
  is 
  dorsally 
  armed 
  on 
  its 
  posterior 
  margin 
  with 
  about 
  five 
  

   alternately 
  larger 
  and 
  smaller 
  spinules 
  ; 
  there 
  are 
  a 
  few 
  minute 
  

   spinules 
  on 
  the 
  posterior 
  margin 
  of 
  the 
  fifth 
  segment, 
  and 
  one 
  at 
  the 
  

   postero-lateral 
  angles 
  of 
  the 
  sixth 
  segment. 
  The 
  telson 
  is 
  double, 
  

   each 
  of 
  the 
  lobes 
  terminating 
  in 
  a 
  spinule, 
  above 
  which 
  are 
  several 
  

   stiff' 
  setae. 
  The 
  eyes 
  are 
  large, 
  round, 
  and 
  black. 
  The 
  superior 
  

   antennae 
  exceed 
  the 
  inferior 
  in 
  length 
  ; 
  the 
  antepenultimate 
  pedun- 
  

   cular 
  joint 
  is 
  rather 
  shorter 
  and 
  stouter 
  than 
  the 
  next 
  joint; 
  the 
  

   last 
  peduncular 
  joint 
  not 
  longer 
  and 
  scarcely 
  stouter 
  than 
  the 
  first 
  

   joint 
  of 
  the 
  flagellum 
  ; 
  accessory 
  flagellum 
  about 
  5-jointed, 
  flagella 
  

   imperfect. 
  Tlie 
  antepenultimate 
  joint 
  of 
  the 
  inferior 
  antennae 
  is 
  

   about 
  half 
  the 
  length 
  of 
  the 
  next 
  joint 
  ; 
  second 
  and 
  third 
  joints 
  sub- 
  

   equal 
  ; 
  flagellum 
  scarcely 
  longer 
  than 
  the 
  third 
  joint. 
  The 
  first 
  pair 
  

   of 
  legs 
  (gnathopods) 
  are 
  comparatively 
  slender 
  and 
  feeble 
  ; 
  wrist 
  

   and 
  palm 
  of 
  about 
  equal 
  length 
  and 
  thickness, 
  and 
  palm 
  with 
  a 
  

   very 
  small 
  and 
  obscure 
  notch 
  in 
  the 
  middle 
  of 
  its 
  distal 
  margin 
  ; 
  

   dactyl 
  about 
  half 
  as 
  long 
  as 
  palm. 
  Second 
  legs 
  with 
  the 
  hands 
  un- 
  

   equal 
  ; 
  in 
  the 
  smaller 
  (right) 
  leg 
  the 
  wrist 
  is 
  dilated 
  distally 
  where 
  

   it 
  is 
  applied 
  to 
  the 
  base 
  of 
  the 
  palm, 
  which 
  is 
  oblong-oval 
  in 
  form, 
  

   with 
  its 
  very 
  oblique 
  distal 
  margin 
  obscurely 
  crenulated 
  and 
  defined 
  

   by 
  an 
  obscure 
  lobe 
  or 
  tooth 
  ; 
  dactyl 
  not 
  half 
  as 
  long 
  as 
  palm. 
  The 
  

   larger 
  (left) 
  leg 
  has 
  the 
  wrist 
  posteriorly 
  deeply 
  excavated 
  and 
  

   distally 
  enlarged 
  to 
  the 
  width 
  of 
  the 
  palm, 
  which 
  is 
  large, 
  massive, 
  

   nearly 
  oblong 
  in 
  shape, 
  with 
  its 
  distal 
  margin 
  deeply 
  excavated, 
  the 
  

   notch 
  enclosing 
  a 
  small 
  tooth 
  and 
  followed 
  by 
  a 
  broad 
  truncated 
  and 
  

   denticulated 
  lobe 
  and 
  by 
  a 
  spine 
  defining 
  the 
  postero-distal 
  angle 
  ; 
  

   the 
  dactyl 
  is 
  about 
  as 
  long 
  as 
  the 
  distal 
  margin 
  of 
  the 
  palm, 
  and 
  

   has 
  a 
  blunt 
  subbasal 
  lobe 
  or 
  tooth 
  on 
  its 
  inner 
  margin. 
  The 
  three 
  

   posterior 
  pairs 
  of 
  legs 
  have 
  the 
  second 
  or 
  basus-joints 
  oblong-oval 
  

   in 
  shape, 
  and 
  i)osteriorly 
  produced 
  at 
  tho 
  distal 
  extremity 
  into 
  a 
  

   prominent 
  tooth 
  or 
  lobe, 
  which 
  in 
  tho 
  posterior 
  pair 
  is 
  spiniform. 
  

   The 
  rami 
  of 
  tho 
  first 
  three 
  pairs 
  of 
  postabdominal 
  appendages 
  are 
  

   considerably 
  elongated 
  ; 
  the 
  fourth 
  and 
  fifth 
  pairs 
  are 
  biramose, 
  with 
  

   the 
  rami 
  subequal, 
  styliform, 
  and 
  (like 
  the 
  bases) 
  armed 
  with 
  stiff 
  

   setaj 
  ; 
  in 
  the 
  last 
  pair 
  the 
  rami 
  are 
  subequal 
  and 
  foliaceous, 
  with 
  the 
  

   margins 
  serrated. 
  Colour 
  (in 
  spirit) 
  reddish. 
  Length 
  of 
  the 
  body 
  

   nearly 
  4 
  lines 
  (8 
  millim.), 
  

  

  Seychelles, 
  4-12 
  fms. 
  ; 
  two 
  specimens. 
  

  

  Both 
  are 
  somewhat 
  mutilated 
  ; 
  the 
  description 
  was 
  therefore 
  taken 
  

   partly 
  from 
  one, 
  partly 
  from 
  the 
  other 
  specimen. 
  

  

  This 
  species, 
  in 
  the 
  form 
  and 
  dcnticulation 
  of 
  the 
  hand 
  of 
  the 
  

   larger 
  leg 
  of 
  the 
  second 
  pair^ 
  somewhat 
  resembles 
  the 
  Mediterranean 
  

  

  