﻿CETTSTACEA. 
  245 
  

  

  margin 
  ; 
  the 
  wrist 
  smooth, 
  its 
  inner 
  margin 
  angulated, 
  the 
  angle 
  

   with 
  a 
  fringe 
  of 
  long 
  stiff 
  hairs, 
  its 
  anterior 
  margin 
  and 
  outer 
  and 
  

   upper 
  surface 
  have 
  also 
  some 
  hairs 
  ; 
  the 
  palm 
  is 
  scarcely 
  longer 
  than 
  

   vertically 
  deep, 
  its 
  upper 
  margin 
  (and 
  that 
  of 
  the 
  mobile 
  finger 
  at 
  

   base) 
  closely 
  fringed 
  with 
  long 
  stiff 
  hairs, 
  and 
  there 
  arc 
  some 
  shorter 
  

   hairs 
  on 
  the 
  lower 
  margin 
  ; 
  the 
  outer 
  surface 
  is 
  smooth, 
  with 
  a 
  few 
  

   scattered 
  punctulations 
  ; 
  the 
  fingers 
  are 
  scarcely 
  longer 
  than 
  the 
  

   palm, 
  denticulated 
  on 
  their 
  inner 
  margins 
  and 
  acute 
  at 
  their 
  apices, 
  

   with 
  scarcely 
  any 
  intramarginal 
  hiatus. 
  The 
  ambulatory 
  legs 
  are 
  

   slender 
  and 
  somewhat 
  hairy 
  ; 
  the 
  tarsi 
  styliform, 
  straight, 
  and 
  longer 
  

   than 
  the 
  penultimate 
  joints. 
  Colour 
  (in 
  spirit) 
  yellowish 
  white. 
  

   Length 
  of 
  carapace 
  about 
  2k 
  lines 
  (5 
  millim.), 
  breadth 
  about 
  3 
  lines 
  

   (6| 
  millim.). 
  

  

  The 
  single 
  specimen 
  (a 
  female) 
  was 
  dredged 
  in 
  the 
  Arafura 
  Sea, 
  

   32-36 
  fms. 
  (No. 
  160). 
  

  

  From 
  the 
  preceding 
  species 
  (C. 
  arcuata) 
  this 
  form 
  is 
  at 
  once 
  dis- 
  

   tinguished 
  by 
  the 
  very 
  differently 
  shaped, 
  smooth, 
  and 
  transverse 
  

   carapace, 
  longer 
  basal 
  antennal 
  joint, 
  &c. 
  

  

  Ceratoplax 
  ciliata, 
  Stimpson, 
  the 
  type 
  of 
  the 
  genus, 
  from 
  the 
  

   N. 
  China 
  Sea, 
  has 
  the 
  body 
  transversely 
  semicylindrical, 
  palm 
  of 
  

   chelipedes 
  with 
  depressed 
  granulations 
  on 
  its 
  outer 
  surface, 
  &c. 
  

  

  M. 
  A. 
  Milne-Edwards 
  has 
  described 
  a 
  genus 
  and 
  species 
  (Notonyx 
  

   nitidits) 
  from 
  New 
  Caledonia*, 
  which 
  in 
  many 
  of 
  its 
  characters 
  and 
  

   in 
  external 
  appearance 
  is 
  very 
  like 
  Ceratoplax'i 
  lavis. 
  It 
  is 
  de- 
  

   scribed 
  and 
  figured, 
  however, 
  as 
  having 
  the 
  carapace, 
  eyes, 
  and 
  

   chelipedes 
  entirely 
  glabrous, 
  there 
  is 
  apparently 
  no 
  tooth 
  on 
  the 
  

   upper 
  margin 
  of 
  the 
  arm, 
  and 
  the 
  dactyli 
  of 
  the 
  ambulatory 
  legs 
  are 
  

   carinatcd 
  ; 
  the 
  carapace 
  is 
  more 
  quadrate, 
  and 
  the 
  merus 
  of 
  the 
  outer 
  

   maxillipedes 
  longer, 
  not 
  transverse, 
  with 
  the 
  antero-external 
  angle 
  

   less 
  prominent. 
  

  

  89. 
  Metopograpsus 
  messor 
  (Forskal). 
  

  

  This 
  common 
  and 
  widely 
  distributed 
  species 
  is 
  represented 
  in 
  the 
  

   first 
  collection 
  by 
  a 
  male 
  and 
  female 
  from 
  Port 
  Molle, 
  obtained 
  on 
  

   the 
  beach 
  (No. 
  95), 
  and 
  two 
  males 
  from 
  Port 
  Curtis, 
  0-19 
  fms. 
  

   (Nos. 
  85-92) 
  ; 
  and 
  in 
  the 
  second 
  collection 
  by 
  a 
  small 
  female 
  from 
  

   the 
  beach 
  at 
  Thursday 
  Island 
  (No. 
  167) 
  and 
  a 
  male 
  and 
  female 
  from 
  

   West 
  Island, 
  Prince 
  of 
  AVales 
  Channel 
  (No. 
  349). 
  Specimens 
  are 
  

   in 
  the 
  British 
  Museum 
  from 
  Pacing 
  Island, 
  Port 
  Curtis, 
  obtained 
  

   under 
  stones 
  at 
  low 
  water 
  (J. 
  Macijillivray, 
  H.M.S. 
  ' 
  Eattlesnake 
  '). 
  

   The 
  other 
  Australian 
  localities 
  whence 
  there 
  are 
  specimens 
  in 
  the 
  

   Museum 
  collection 
  are 
  : 
  — 
  Port 
  Essington 
  ; 
  Nicol 
  Bay, 
  N.W. 
  Austra- 
  

   ha 
  {M. 
  du 
  Boulay) 
  ; 
  Keppel 
  Islands, 
  from 
  mud 
  among 
  mangrove- 
  

   roots 
  (J. 
  MacqUli'vray) 
  ; 
  Moreton 
  Bay 
  {purchased 
  of 
  Wurunch) 
  ; 
  and 
  

   Shark 
  Bay, 
  W. 
  Australia 
  {F. 
  M. 
  Itayner, 
  H.M.S. 
  ' 
  Herald 
  '). 
  

  

  Specimens 
  also 
  are 
  in 
  the 
  collection 
  of 
  the 
  Museum 
  from 
  :he 
  Gulf 
  

   of 
  Suez 
  {R. 
  MacAndrew, 
  Esq.) 
  ; 
  Red 
  Sea 
  {Major 
  J. 
  Burton) 
  ; 
  Mada- 
  

  

  * 
  Nouv. 
  Archiv. 
  Mus. 
  Hist. 
  Nat. 
  ix. 
  pp. 
  268, 
  2B9, 
  pi. 
  xii. 
  fig. 
  3 
  (1872). 
  

  

  