﻿CKUSTACEA. 
  233 
  

  

  smooth. 
  Front 
  8-lobed, 
  the 
  lobes 
  rounded, 
  the 
  median 
  scarcely 
  

   more 
  prominent 
  than 
  the 
  rest 
  ; 
  the 
  fissure 
  between 
  the 
  median 
  lobes 
  

   and 
  between 
  the 
  second 
  and 
  third 
  lobes 
  narrow-linear, 
  tliose 
  between 
  

   the 
  first 
  and 
  second 
  and 
  the 
  third 
  and 
  fourth 
  lobes 
  triangulate. 
  

   Antero-lateral 
  margins 
  armed 
  with 
  six 
  teeth, 
  whereof 
  the 
  first 
  is 
  

   subtruncated, 
  the 
  second 
  to 
  filth 
  triangulate 
  and 
  acute 
  and 
  directed 
  

   forward, 
  the 
  sixth 
  about 
  twice 
  as 
  long 
  as 
  the 
  preceding 
  and 
  laterally- 
  

   projecting. 
  Chelipedes 
  short 
  and 
  robust, 
  arm 
  or 
  merus-joiut 
  with 
  

   two 
  strong 
  spines 
  near 
  the 
  distal 
  end 
  of 
  its 
  anterior 
  margin, 
  its 
  pos- 
  

   terior 
  margin 
  convex, 
  smooth, 
  and 
  angulated 
  at 
  a 
  point 
  midway 
  from 
  

   either 
  extremity 
  ; 
  wrist 
  with 
  a 
  strong 
  spine 
  on 
  its 
  inner 
  margin, 
  and 
  

   three 
  smaller 
  spines 
  on 
  its 
  outer 
  surface 
  ; 
  palm 
  with 
  three 
  spines, 
  

   whereof 
  one 
  is 
  situated 
  at 
  the 
  proximal 
  end 
  close 
  to 
  the 
  articulation 
  

   with 
  the 
  wrist, 
  and 
  two 
  on 
  the 
  upper 
  surface; 
  there 
  is 
  none 
  above 
  

   the 
  base 
  of 
  the 
  mobile 
  finger 
  ; 
  the 
  carinae 
  of 
  the 
  upper 
  and 
  outer 
  sur- 
  

   face 
  of 
  the 
  palm 
  and 
  the 
  intervening 
  parts 
  are 
  nearly 
  smooth 
  ; 
  the 
  

   fingers 
  are 
  armed 
  along 
  their 
  inner 
  margins 
  with 
  triangulate 
  teeth, 
  

   which 
  fit 
  closely 
  between 
  one 
  another 
  when 
  the 
  fingers 
  are 
  closed, 
  

   and 
  which 
  are 
  themselves 
  divided 
  into 
  several 
  smaller 
  teeth. 
  The 
  

   second 
  to 
  fourth 
  ambulatory 
  legs 
  are 
  slender, 
  smooth 
  ; 
  the 
  penulti- 
  

   mate 
  joint 
  of 
  the 
  fifth 
  leg 
  is 
  not 
  denticulated 
  on 
  its 
  inferior 
  margin 
  ; 
  

   there 
  is 
  a 
  spine 
  at 
  the 
  distal 
  end 
  of 
  the 
  inferior 
  margin 
  of 
  the 
  

   merus-joint. 
  Length 
  of 
  the 
  carapace 
  of 
  the 
  largest 
  example 
  about 
  

   I 
  inch 
  (19 
  millim.), 
  breadth 
  to 
  base 
  of 
  lateral 
  epibranchial 
  spines 
  

   about 
  1 
  inch 
  (25 
  millim.). 
  

  

  A 
  single 
  specimen 
  is 
  in 
  the 
  second 
  collection, 
  a 
  male 
  from 
  Port 
  

   Darwin, 
  12 
  fms. 
  

  

  There 
  are 
  in 
  the 
  British-Museum 
  collection 
  several 
  specimens 
  of 
  

   what 
  is 
  probably 
  a 
  mere 
  variety 
  of 
  this 
  species 
  from 
  Karachi 
  

   (Karachi 
  Museum)^ 
  referred 
  to 
  by 
  A. 
  M. 
  -Edwards 
  as 
  G. 
  calUanassa, 
  

   which 
  differ 
  in 
  having 
  wider 
  fissures 
  between 
  the 
  median 
  and 
  the 
  

   second 
  and 
  third 
  teeth 
  of 
  the 
  front. 
  The 
  first 
  tooth 
  of 
  the 
  antero- 
  

   lateral 
  margins 
  is 
  more 
  distinctly 
  truncated, 
  and 
  the 
  last 
  spine 
  is 
  

   shorter 
  ; 
  also 
  the 
  spines 
  of 
  the 
  arm, 
  wrist, 
  and 
  palm 
  of 
  the 
  cheli- 
  

   pedes 
  are 
  much 
  shorter, 
  those 
  of 
  the 
  upper 
  surface 
  of 
  the 
  palm 
  being 
  

   reduced 
  to 
  mere 
  spinules, 
  and 
  the 
  palm 
  itself 
  much 
  more 
  turgid, 
  as 
  

   in 
  A. 
  Milne-Edwards's 
  description. 
  

  

  74. 
  Goniosoma 
  spiniferum. 
  (Plate 
  XXIII. 
  fig. 
  C.) 
  

  

  A 
  single 
  specimen 
  is 
  in 
  the 
  collection, 
  obtained 
  at 
  Port 
  Molle, 
  

   between 
  tide-marks 
  (Xo. 
  103), 
  which 
  is 
  evidently 
  nearly 
  allied 
  to, 
  

   and 
  in 
  M. 
  A. 
  Milne-Edwards's 
  arrangement 
  must 
  be 
  classed 
  near 
  to, 
  

   Goniosoma 
  affine 
  (Dana), 
  from 
  Singapore. 
  It 
  differs, 
  however, 
  in 
  

   the 
  form 
  of 
  the 
  frontal 
  lobes, 
  the 
  median 
  and 
  submedian 
  being 
  

   broadly 
  rounded 
  and 
  separated 
  by 
  narrow 
  and 
  not 
  deep 
  fissures. 
  

   The 
  fissure 
  between 
  the 
  second 
  and 
  third 
  lobe 
  on 
  each 
  side 
  is 
  much 
  

   deeper, 
  and, 
  although 
  narrow, 
  wider 
  than 
  those 
  between 
  the 
  median 
  

   and 
  submedian 
  lobes 
  ; 
  the 
  third 
  lobe 
  is 
  itself 
  narrower 
  than 
  these, 
  

  

  