﻿260 
  COIIECTIONS 
  TROM 
  MELANESIA. 
  

  

  the 
  penultimate 
  and 
  antepenultimate 
  joints 
  of 
  the 
  ambulatory 
  legs 
  

   are 
  more 
  distinct. 
  

  

  2. 
  Petalomera 
  pulchra. 
  (Plate 
  XXVII. 
  fig. 
  A.) 
  

  

  Carapace 
  somewhat 
  oblong-oval, 
  and 
  a 
  little 
  longer 
  than 
  broad, 
  

   moderately 
  convex 
  and 
  granulated 
  ; 
  its 
  anterior 
  parts 
  are 
  rather 
  

   thinly 
  pubescent, 
  the 
  front 
  in 
  its 
  median 
  portion 
  is 
  nearly 
  vertically 
  

   deilexed 
  (see 
  fig. 
  a) 
  ; 
  the 
  lateral 
  frontal 
  lobes 
  are 
  prominent, 
  in 
  a 
  

   dorsal 
  view 
  triangulate, 
  and 
  are 
  separated 
  from 
  one 
  another 
  by 
  a 
  

   deeply 
  concave 
  interspace. 
  The 
  upper 
  orbital 
  margin 
  is 
  thin, 
  pro- 
  

   minent, 
  and 
  entire 
  ; 
  there 
  is 
  a 
  small 
  notch 
  at 
  the 
  outer 
  angle 
  ; 
  the 
  

   sides 
  of 
  the 
  carapace 
  are 
  armed 
  with 
  three 
  small 
  teeth 
  placed 
  in 
  an 
  

   oblique 
  series, 
  the 
  anterior 
  of 
  which 
  is 
  situated 
  upon 
  the 
  subhepatic 
  

   region 
  ; 
  the 
  carapace 
  in 
  front 
  of 
  these 
  teeth 
  is 
  somewhat 
  coarsely 
  

   granulated. 
  Distinct 
  longitudinal 
  ridges 
  exist 
  on 
  the 
  endostome 
  or 
  

   palate. 
  The 
  sternal 
  sit 
  Zfi 
  in 
  the 
  female 
  are 
  remote 
  from 
  one 
  another, 
  

   and 
  terminate 
  in 
  tubercles 
  which 
  are 
  situated 
  a 
  little 
  behind 
  the 
  

   bases 
  of 
  the 
  second 
  pair 
  of 
  legs 
  (see 
  fig. 
  a'). 
  The 
  eyes 
  are 
  of 
  

   moderate 
  length, 
  cornese 
  distinct 
  ; 
  the 
  peduncles 
  of 
  the 
  antennae 
  are 
  

   rather 
  robust 
  ; 
  the 
  second 
  joint 
  somewhat 
  longer 
  than 
  the 
  first 
  or 
  

   the 
  third. 
  The 
  merus-joint 
  of 
  the 
  outer 
  maxillipedes 
  is 
  about 
  as 
  

   long 
  as 
  the 
  ischium, 
  truncated 
  at 
  its 
  distal 
  end, 
  and 
  without 
  any 
  

   notch 
  at 
  its 
  antero-external 
  angle 
  where 
  the 
  next 
  joint 
  articulates 
  

   with 
  it. 
  The 
  chelipedes 
  are 
  subequal 
  : 
  the 
  merus 
  has 
  its 
  upper 
  

   margin 
  produced 
  into 
  a 
  high 
  arched 
  crest, 
  its 
  inner 
  surface 
  is 
  smooth 
  

   and 
  polished, 
  its 
  outer 
  pubescent, 
  the 
  inner 
  and 
  lower 
  margin 
  is 
  

   sharp-edged 
  and 
  entire 
  ; 
  the 
  wrist 
  and 
  palm 
  are 
  also 
  slightly 
  cris- 
  

   tated 
  above, 
  and 
  have 
  their 
  outer 
  surfaces 
  granulated 
  and 
  pubescent 
  ; 
  

   the 
  wrist 
  has 
  two 
  larger 
  tubercles 
  or 
  prominences 
  at 
  its 
  distal 
  end 
  ; 
  

   the 
  granules 
  on 
  the 
  palm 
  disposed 
  in 
  six 
  longitudinal 
  series 
  ; 
  fingers 
  

   somewhat 
  shorter 
  than 
  the 
  palm 
  and 
  meeting 
  along 
  their 
  regularly 
  

   serrated 
  inner 
  edges 
  when 
  closed, 
  excavate 
  and 
  naked 
  at 
  the 
  apices. 
  

   The 
  ambulatory 
  legs 
  are 
  pubescent 
  and 
  moderately 
  robust 
  ; 
  the 
  

   merus-joint 
  of 
  the 
  first 
  pair 
  has 
  its 
  upper 
  margin 
  produced 
  (as 
  in 
  the 
  

   chelipedes) 
  into 
  a 
  high 
  arched 
  crest, 
  in 
  the 
  next 
  pair 
  this 
  joint 
  is 
  

   not 
  specially 
  dilated 
  and 
  its 
  upper 
  margin 
  is 
  straight 
  : 
  the 
  last 
  two 
  

   legs 
  terminate 
  in 
  a 
  small 
  curved 
  claw, 
  but 
  the 
  penultimate 
  joint 
  has 
  

   no 
  terminal 
  spiniform 
  process. 
  Colour 
  (in 
  spirit) 
  greyish 
  or 
  cine- 
  

   reous. 
  Length 
  of 
  carapace 
  nearly 
  ^ 
  inch 
  (19 
  millim.), 
  breadth 
  

   ^ 
  lines 
  (18 
  millim). 
  

  

  The 
  females 
  were 
  obtained 
  in 
  Prince 
  of 
  Wales 
  Channel, 
  7-9 
  fms. 
  

  

  This 
  species 
  is 
  distinguished 
  from 
  P. 
  gramdatcf, 
  8timpson, 
  the 
  

   type 
  of 
  the 
  genus, 
  from 
  Kajosima, 
  Japan, 
  by 
  the 
  absence 
  of 
  a 
  dis- 
  

   tinct 
  supraocular 
  tooth, 
  and 
  by 
  the 
  non-cristated 
  merus-joint 
  of 
  the 
  

   third 
  pair 
  of 
  legs, 
  &c. 
  It 
  cannot 
  be 
  confounded 
  with 
  any 
  of 
  the 
  

   Australian 
  Dromice 
  described 
  by 
  Mr. 
  Haswell 
  (Catal. 
  pp. 
  139-141). 
  

  

  