﻿CRUSTACEA. 
  285 
  

  

  without 
  or 
  has 
  only 
  a 
  rudimentary 
  spine 
  at 
  base 
  ; 
  it 
  narrows 
  some- 
  

   what 
  to 
  its 
  apex, 
  which 
  has 
  a 
  small 
  spinule 
  at 
  its 
  outer 
  angle. 
  The 
  

   larger 
  chelipede 
  (which 
  may 
  be 
  either 
  the 
  right 
  or 
  left) 
  has 
  a 
  mas- 
  

   sive 
  hand, 
  which 
  is 
  rounded 
  at 
  its 
  proximal 
  end, 
  notched 
  above 
  and 
  

   toothed 
  below, 
  just 
  behind 
  the 
  bases 
  of 
  the 
  fingers 
  ; 
  on 
  the 
  outer 
  

   and 
  inner 
  surface 
  of 
  the 
  palm, 
  just 
  below 
  the 
  incision 
  in 
  the 
  upper 
  

   margin, 
  is 
  an 
  irregular 
  shallow 
  depression, 
  that 
  on 
  the 
  inner 
  surface 
  

   being 
  somewhat 
  of 
  a 
  triangulate 
  and 
  that 
  on 
  the 
  outer 
  surface 
  of 
  a 
  

   quadrangula,te 
  shape 
  ; 
  an 
  impressed 
  line, 
  which 
  forms 
  the 
  posterior 
  

   margin 
  of 
  the 
  depression 
  of 
  the 
  inner 
  surface, 
  passes 
  obliquely 
  down- 
  

   ward 
  to 
  the 
  lower 
  and 
  proximal 
  margin, 
  and 
  upward 
  over 
  the 
  

   rounded 
  superior 
  margin, 
  whence 
  it 
  is 
  prolonged 
  in 
  a 
  nearly 
  straight 
  

   line 
  along 
  the 
  upper 
  and 
  outer 
  surface 
  to 
  the 
  rounded 
  base 
  of 
  the 
  

   upper 
  margin 
  : 
  this 
  line 
  is 
  sometimes 
  nearly 
  obsolete 
  ; 
  the 
  mobile 
  

   finger 
  is 
  rounded 
  and 
  subcarinated 
  above, 
  and 
  is 
  armed 
  on 
  its 
  inner 
  

   margin 
  near 
  the 
  base 
  with 
  a 
  very 
  prominent 
  rounded 
  tooth 
  or 
  lobe, 
  

   which 
  fits 
  into 
  a 
  deep 
  pit 
  in 
  the 
  lower 
  (immobile) 
  finger 
  ; 
  the 
  smaller 
  

   chela 
  is 
  slender 
  (in 
  the 
  typical 
  form), 
  without 
  notches, 
  teeth, 
  or 
  

   sulci 
  ; 
  the 
  second 
  joint 
  of 
  the 
  carpus 
  of 
  the 
  second 
  leg 
  is 
  usually 
  a 
  

   little 
  shorter 
  than 
  the 
  first, 
  the 
  three 
  last 
  joints 
  short, 
  the 
  fifth 
  a 
  

   little 
  longer 
  than 
  the 
  fourth. 
  

  

  In 
  some 
  specimens 
  the 
  lobe 
  or 
  tooth 
  immediately 
  behind 
  the 
  

   notch 
  on 
  the 
  upper 
  and 
  lower 
  margins 
  of 
  the 
  large 
  chela 
  is 
  rounded 
  

   or 
  subacute, 
  in 
  others 
  it 
  is 
  acute. 
  

  

  Eight 
  specimens 
  (males 
  and 
  females) 
  are 
  in 
  the 
  first 
  collection 
  

   from 
  Port 
  Curtis, 
  0-11 
  fms. 
  (No. 
  92), 
  one 
  (male) 
  from 
  Port 
  Molle 
  

   beach 
  (Xo. 
  9o), 
  and 
  two 
  females 
  from 
  Port 
  Dcnison, 
  4 
  fms. 
  (No. 
  Ill); 
  

   a 
  small 
  specimen 
  (No. 
  123) 
  is 
  without 
  special 
  indication 
  of 
  locality. 
  

   In 
  the 
  second 
  collection 
  are 
  two 
  small 
  specimens 
  from 
  Thursday 
  

   Island, 
  4-5 
  fms., 
  a 
  female 
  from 
  Dundas 
  Straits, 
  17 
  fms. 
  (No. 
  161), 
  

   and 
  an 
  adult 
  female 
  from 
  the 
  beach 
  at 
  Port 
  Darwin 
  (No. 
  176). 
  

  

  There 
  are, 
  besides, 
  specimens 
  in 
  the 
  British-Museum 
  collec- 
  

   tion 
  from 
  other 
  localities 
  as 
  follows 
  : 
  — 
  North 
  Australia 
  (Dr. 
  J. 
  R. 
  

   Else]/), 
  Port 
  Essington 
  and 
  Rockhampton 
  {Oodcffroy 
  Museum 
  

   as 
  A. 
  brevirostn's, 
  M.-E.). 
  Also 
  from 
  the 
  lied 
  Sea 
  (Br. 
  C. 
  

   Heller); 
  Gulf 
  of 
  Suez 
  {JR. 
  MacAndreiu) 
  ; 
  Egypt 
  (J. 
  Burton); 
  

   Zanzibar 
  {Dr. 
  KirTc) 
  ; 
  Seychelles 
  {Dr. 
  E. 
  P. 
  Wright) 
  ; 
  Karachi 
  

   {Karachi 
  Miiseum) 
  ; 
  Ceylon 
  {E. 
  W. 
  H. 
  Holdsworth) 
  ; 
  Indian 
  Ocean, 
  

   Philippine 
  Islands, 
  Jiohol 
  {Cuming) 
  ; 
  Japan, 
  Katsura 
  {Copt. 
  U. 
  C. 
  

   St. 
  John, 
  li.N., 
  the 
  specimens 
  I 
  formerly 
  designated 
  A. 
  hisincisus, 
  

   De 
  Haan) 
  ; 
  New 
  Hebrides 
  {J. 
  MacgilUvray) 
  ; 
  Eiji 
  Islands, 
  Nairai 
  

   {H.M.S. 
  'Hercdd'); 
  Samoa 
  Islands, 
  Upolu 
  {Eev. 
  S. 
  J. 
  Whit- 
  

   mee) 
  : 
  Tahiti 
  {Mus. 
  Godeffroy, 
  as 
  A. 
  pacijicus, 
  Dana) 
  ; 
  Sandwich 
  

   Islands 
  {W. 
  H. 
  Pease). 
  Specimens 
  from 
  the 
  island 
  of 
  Trinidad 
  

   {li. 
  J. 
  Lechmere 
  Guppy) 
  and 
  the 
  west 
  coast 
  of 
  Central 
  America 
  

   {Capt. 
  Dow) 
  seem 
  to 
  be 
  scarcely 
  specifically 
  distinguishable 
  *. 
  

  

  The 
  males 
  may 
  be 
  distinguished 
  from 
  the 
  females 
  by 
  the 
  form 
  of 
  

  

  * 
  The 
  series 
  of 
  specimens 
  in 
  tbe 
  British-MuBeum 
  coUeclion, 
  extensive 
  though 
  

   it 
  be, 
  does 
  not 
  fully 
  exhibit 
  the 
  ascertained 
  range 
  of 
  this 
  species. 
  According 
  to 
  

  

  