﻿CRUSTACEA. 
  223 
  

  

  be 
  at 
  once 
  distinguished 
  by 
  the 
  following 
  characters 
  : 
  — 
  The 
  carapace 
  

   is 
  broader 
  in 
  proportion 
  to 
  its 
  length, 
  and 
  its 
  anterior 
  parts 
  clothed 
  

   with 
  a 
  close 
  velvetj' 
  pubescence, 
  which 
  also 
  extends 
  over 
  the 
  upper 
  

   and 
  outer 
  surface 
  of 
  the 
  wrist 
  and 
  palm 
  of 
  the 
  chclipedes 
  ; 
  the 
  two 
  

   posterior 
  teeth 
  of 
  the 
  antero-lateral 
  margins 
  are 
  more 
  distinctly 
  

   spiniform, 
  the 
  basal 
  antennal 
  joint 
  does 
  not 
  nearly 
  reach 
  to 
  the 
  sub- 
  

   frontal 
  process 
  ; 
  the 
  granulations 
  of 
  the 
  wrist 
  and 
  palm 
  are 
  much 
  

   more 
  inconspicuous, 
  those 
  of 
  the 
  outer 
  surface 
  of 
  the 
  palm 
  appear, 
  

   through 
  the 
  pubescence, 
  to 
  be 
  arranged 
  in 
  four 
  distinct 
  longitudinal 
  

   series 
  (fig. 
  c) 
  ; 
  the 
  ambulatory 
  legs 
  are 
  slenderer. 
  

  

  Colour 
  (in 
  spirit) 
  purplish 
  brown, 
  hairs 
  cinereous. 
  Length 
  of 
  the 
  

   largest 
  specimen, 
  a 
  female, 
  about 
  5| 
  lines 
  (nearly 
  12 
  millim.), 
  

   breadth 
  about 
  7| 
  lines 
  (16 
  millim.). 
  

  

  There 
  is 
  a 
  male 
  in 
  the 
  first 
  collection 
  from 
  Port 
  Denison, 
  4 
  fms. 
  

   (No. 
  Ill), 
  and 
  a 
  female 
  in 
  the 
  second 
  collection 
  from 
  Thursday 
  

   Island, 
  4-5 
  fms. 
  (Xo. 
  1G5). 
  

  

  Mr. 
  Haswell 
  has 
  described 
  a 
  species 
  {Pllumnus 
  inermis*) 
  from 
  

   Port 
  Jackson 
  which 
  apparently 
  resembles 
  this 
  and 
  the 
  preceding 
  

   species 
  in 
  having 
  the 
  anterior 
  parts 
  only 
  of 
  the 
  carapace 
  clothed 
  

   with 
  hairs, 
  which 
  are 
  long 
  as 
  in 
  P. 
  semilanatus. 
  It 
  differs, 
  how- 
  

   ever, 
  in 
  the 
  less 
  distinctly 
  toothed 
  antero-lateral 
  margins 
  of 
  the 
  

   carapace, 
  in 
  the 
  form 
  of 
  the 
  front, 
  which 
  is 
  entire, 
  not 
  notched, 
  and 
  

   in 
  the 
  disposition 
  of 
  the 
  granules 
  of 
  the 
  chelipedes, 
  both 
  from 
  P. 
  

   semilanatus 
  and 
  P. 
  seminmlus. 
  

  

  Pllumnus 
  Icevimanus, 
  Danaf, 
  is 
  apparently 
  allied 
  to 
  this 
  and 
  the 
  

   foregoing 
  species, 
  but 
  has 
  the 
  carapace 
  almost 
  wholly 
  naked, 
  and 
  

   the 
  larger 
  hand 
  rounded 
  above 
  and 
  quite 
  smooth, 
  with 
  only 
  some 
  

   faint 
  traces 
  of 
  minute 
  tubercles 
  toward 
  the 
  base. 
  It 
  has 
  been 
  re- 
  

   corded 
  from 
  Borneo 
  and 
  New 
  Caledonia. 
  

  

  In 
  Pllumnus 
  nitidns, 
  A. 
  M. 
  -Edwards 
  +, 
  from 
  New 
  Caledonia, 
  

   which 
  is 
  another 
  nearly 
  allied 
  species, 
  the 
  two 
  anterior 
  teeth 
  of 
  the 
  

   antero-lateral 
  margins 
  of 
  the 
  carapace 
  are 
  obsolete, 
  

  

  59. 
  Pllumnus 
  cursor 
  ? 
  

  

  ? 
  Pllumnus 
  cursor, 
  A. 
  M.-Edwards, 
  Nuuv. 
  Archiv. 
  Mus. 
  Hist. 
  Nat. 
  

   ix. 
  p. 
  244, 
  pi. 
  ix. 
  fig. 
  4 
  (1873). 
  

  

  In 
  the 
  specimen 
  I 
  thus 
  very 
  doubtfully 
  designate 
  the 
  cara- 
  

   pace 
  is 
  nearly 
  smooth, 
  with 
  the 
  anterior 
  portion 
  moderately 
  de- 
  

   flexed, 
  antero-lateral 
  margins 
  much 
  shorter 
  than 
  the 
  postero- 
  

   lateral, 
  which 
  are 
  nearly 
  straight 
  and 
  convergent 
  posteriorly 
  ; 
  both 
  

   carapace 
  and 
  limbs 
  are 
  scantily 
  clothed 
  with 
  very 
  short 
  hairs, 
  

   among 
  which 
  a 
  few 
  longer 
  hairs 
  are 
  interspersed 
  ; 
  the 
  frontal 
  lobes 
  

   are 
  divided 
  by 
  a 
  rather 
  deep 
  and 
  wide 
  median 
  fissure 
  ; 
  the 
  antero- 
  

   lateral 
  margins 
  are 
  armed 
  with 
  three 
  spines, 
  besides 
  a 
  smaller 
  but 
  

   distinct 
  spine 
  at 
  the 
  exterior 
  angle 
  of 
  the 
  orbit. 
  The 
  basal 
  antennal 
  

  

  * 
  Proc. 
  Linn. 
  Soc. 
  N. 
  S. 
  Wales, 
  vi. 
  p. 
  544 
  (1881) 
  ; 
  Cat.alogue, 
  p. 
  70 
  (1882). 
  

   t 
  Crust. 
  U.S. 
  Expl. 
  Exp. 
  xiii. 
  p. 
  237, 
  pi. 
  xiii. 
  fig. 
  11 
  (1852). 
  

   X 
  Nouv. 
  Arch. 
  Mus. 
  ix. 
  p. 
  249, 
  pi. 
  x. 
  lig. 
  2 
  (1873). 
  

  

  