﻿CRUSTACEA. 
  221 
  

  

  lower 
  surfaces 
  of 
  the 
  hands 
  ; 
  the 
  front 
  is 
  moderately 
  defiexed, 
  and 
  is 
  

   divided 
  by 
  a 
  median 
  notch 
  into 
  two 
  rounded 
  lobes 
  ; 
  the 
  autero-lateral 
  

   margins 
  are 
  somewhat 
  shorter 
  than 
  the 
  postero-lateral, 
  with 
  only 
  

   the 
  three 
  posterior 
  teeth 
  distinct, 
  these 
  are 
  small 
  and 
  spiniforra. 
  

   The 
  orbits 
  are 
  tuberculated 
  on 
  their 
  margins, 
  but 
  without 
  any 
  dis- 
  

   tinct 
  spinules 
  ; 
  the 
  inner 
  suborbital 
  angle 
  is 
  rather 
  prominent. 
  All 
  

   the 
  postabdominal 
  segments 
  are 
  distinct 
  in 
  both 
  sexes. 
  The 
  basal 
  

   antennal 
  joint 
  apparently 
  does 
  not 
  reach 
  to 
  the 
  front 
  ; 
  the 
  merus- 
  

   joint 
  of 
  the 
  outer 
  maxillipedes 
  is 
  short 
  and 
  transverse 
  ; 
  the 
  cheli- 
  

   pedes 
  in 
  the 
  male 
  have 
  the 
  merus-joint 
  short 
  and 
  trigonous, 
  with 
  a 
  

   tooth 
  near 
  the 
  distal 
  end 
  of 
  its 
  upper 
  margin 
  ; 
  carpus 
  and 
  palm 
  

   granulated 
  on 
  their 
  outer 
  surface, 
  but 
  the 
  granules 
  for 
  the 
  most 
  

   part 
  concealed 
  by 
  the 
  pubescence 
  ; 
  there 
  is 
  a 
  small 
  tuberculiform 
  or 
  

   subspiniform 
  tooth 
  on 
  the 
  inner 
  margin 
  of 
  the 
  carpus 
  or 
  wrist 
  ; 
  the 
  

   hand 
  (for 
  so 
  small 
  a 
  species) 
  is 
  large, 
  its 
  inner 
  surface 
  naked, 
  smooth, 
  

   and 
  polished, 
  and 
  the 
  granulations 
  usually 
  obsolete 
  on 
  the 
  naked 
  

   part 
  of 
  the 
  outer 
  surface 
  in 
  the 
  larger 
  chelipede 
  ; 
  the 
  fingers 
  are 
  

   chocolate-brown, 
  the 
  coloration 
  not 
  extending 
  over 
  any 
  part 
  of 
  the 
  

   palm, 
  and 
  the 
  upper 
  finger 
  has 
  scarcely 
  any 
  traces 
  of 
  teeth 
  on 
  its 
  

   inner 
  margin. 
  The 
  ambulatory 
  legs 
  are 
  closely 
  pubescent. 
  Length 
  

   of 
  the 
  largest 
  male 
  in 
  the 
  collection 
  a 
  little 
  over 
  4g 
  lines 
  (10 
  millim.), 
  

   breadth 
  about 
  6| 
  lines 
  (14 
  millim.) 
  ; 
  length 
  of 
  largest 
  chelipede 
  

   about 
  10| 
  lines 
  (22 
  millim.). 
  

  

  Ten 
  specimens 
  are 
  in 
  the 
  collection, 
  from 
  Port 
  Jackson, 
  5-7 
  fms. 
  

   (No. 
  104). 
  

  

  Either 
  the 
  right 
  or 
  the 
  left 
  chelipede 
  may 
  be 
  the 
  larger 
  in 
  the 
  

   male. 
  Occasionally 
  the 
  granulations 
  of 
  the 
  hands 
  are 
  distinct 
  even 
  

   upon 
  the 
  naked 
  part 
  of 
  the 
  outer 
  surface 
  ; 
  there 
  are 
  several 
  females 
  

   in 
  the 
  series 
  of 
  very 
  small 
  size, 
  yet 
  bearing 
  ova. 
  

  

  There 
  is 
  in 
  the 
  British-Museum 
  collection 
  a 
  specimen 
  from 
  Percy 
  

   Island 
  (H.j\I.S. 
  ' 
  Herald 
  '). 
  Possibly 
  also 
  a 
  small 
  male 
  from 
  Tas- 
  

   mania 
  (B. 
  Giinn) 
  is 
  to 
  be 
  referred 
  here. 
  

  

  Finally, 
  there 
  are 
  in 
  Dr. 
  Coppinger's 
  collection 
  a 
  series 
  of 
  very 
  

   small 
  specimens 
  from 
  Port 
  Denison, 
  4 
  fms. 
  (No. 
  Ill), 
  of 
  much 
  

   paler 
  colour 
  than 
  those 
  collected 
  at 
  Port 
  Jackson, 
  and 
  two 
  from 
  

   Port 
  Curtis, 
  11 
  fms. 
  (No. 
  87), 
  which 
  j)erhaps 
  belong 
  to 
  this 
  species. 
  

   This 
  species 
  bears 
  some 
  resemblance 
  to 
  P. 
  hirsutus, 
  Stimpson, 
  

   which 
  Mr. 
  Haswell 
  records 
  from 
  Port 
  Jacksoi], 
  but 
  differs 
  (in 
  the 
  

   adult 
  at 
  least) 
  in 
  the 
  close 
  brown 
  pubescence, 
  and 
  in 
  having 
  a 
  series 
  of 
  

   tubercles 
  or 
  small 
  spines 
  on 
  the 
  carpus 
  (not 
  merus) 
  of 
  the 
  ambulatory 
  

   legs. 
  In 
  the 
  specimens 
  from 
  the 
  Japanese 
  or 
  Corean 
  seas 
  referred 
  

   to 
  P. 
  hirsvtus 
  in 
  the 
  Museum 
  collection 
  there 
  is 
  but 
  a 
  single 
  spinule 
  

   at 
  the 
  distal 
  end 
  of 
  the 
  carpus 
  of 
  these 
  legs. 
  Pilumnus 
  Jisdfrons, 
  

   Stimpson, 
  from 
  Port 
  Jackson, 
  differs 
  in 
  having 
  the 
  carapace 
  

   distinctly 
  areolated 
  and 
  the 
  antero-lateral 
  marginal 
  teeth 
  normally 
  

   developed. 
  

  

  If 
  our 
  specimens 
  should 
  prove 
  to 
  belong 
  to 
  an 
  undescribed 
  species, 
  

   I 
  would 
  propose 
  for 
  tliem 
  the 
  name 
  of 
  P. 
  humilis. 
  

  

  