﻿274 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  with 
  two 
  or 
  three 
  strong 
  triangular 
  teeth 
  on 
  its 
  inner 
  margin 
  ; 
  palm 
  

   about 
  as 
  long 
  as 
  the 
  wrist, 
  and 
  with 
  the 
  lower 
  finger 
  almost 
  trian- 
  

   gulate 
  in 
  shape 
  ; 
  the 
  outer 
  surface 
  of 
  the 
  palm 
  is 
  divided 
  by 
  four 
  

   sulci 
  into 
  five 
  longitudinal, 
  smooth, 
  rounded 
  ridges, 
  including 
  the 
  

   rather 
  less 
  prominent 
  line 
  or 
  ridge 
  along 
  the 
  lower 
  margin 
  of 
  the 
  

   palm 
  ; 
  the 
  fingers 
  are 
  smooth, 
  scarcely 
  denticulated 
  on 
  their 
  inner 
  

   margins, 
  incurved 
  at 
  the 
  tips, 
  and 
  have 
  between 
  them 
  (when 
  closed) 
  

   a 
  more 
  or 
  less 
  distiuct 
  hiatus 
  ; 
  the 
  first 
  to 
  third 
  ambulatory 
  legs 
  

   have 
  the 
  joints 
  (except 
  the 
  last) 
  armed 
  with 
  small 
  tubercles 
  or 
  

   prominences 
  on 
  their 
  upper 
  margins 
  ; 
  the 
  dactyli 
  have 
  several 
  

   spinules 
  on 
  their 
  lower 
  margins. 
  The 
  colour 
  (of 
  spirit-specimens) 
  

   is 
  white, 
  faintly 
  tinged 
  or 
  spotted 
  with 
  pink. 
  Length 
  2^ 
  lines 
  

   (5 
  millim.) 
  ; 
  breadth 
  a 
  little 
  over 
  2| 
  lines 
  (nearly 
  6 
  millim.). 
  

  

  Two 
  specimens 
  (male 
  and 
  female) 
  are 
  in 
  the 
  first 
  collection 
  — 
  one 
  

   obtained 
  at 
  Port 
  MoUe, 
  5-12 
  fms. 
  (No. 
  118), 
  and 
  the 
  other 
  at 
  

   Albany 
  Island, 
  3-4 
  fms. 
  In 
  the 
  second 
  collection 
  are 
  eight 
  speci- 
  

   mens 
  (male 
  and 
  female) 
  obtained 
  at 
  Thursday 
  Island 
  in 
  3-4 
  fms. 
  

   (No. 
  177), 
  4-5 
  fms. 
  (No. 
  165). 
  Mr. 
  Hasvvell 
  records 
  it 
  also 
  from 
  

   Holborn 
  Island. 
  

  

  This 
  species 
  cannot 
  be 
  confounded 
  with 
  any 
  of 
  the 
  species 
  of 
  

   Pacliyclieles 
  mentioned 
  by 
  Dr. 
  Stimpson 
  in 
  his 
  very 
  useful 
  Synopsis 
  

   of 
  the 
  Anomura 
  * 
  ; 
  and 
  in 
  its 
  slenderer 
  chelipedes 
  approaches 
  Por- 
  

   cellana, 
  to 
  which 
  genus 
  Mr. 
  Haswell 
  refers 
  it. 
  

  

  Tn 
  two 
  specimens 
  from 
  Prince 
  of 
  Wales 
  Channel, 
  7 
  fms. 
  (Nos. 
  

   142, 
  169), 
  which 
  are 
  probably 
  not 
  distinct, 
  the 
  chelipedes 
  are 
  more 
  

   unequal 
  and 
  smoother. 
  One 
  example 
  has 
  the 
  left 
  chelipede 
  much 
  

   enlarged, 
  the 
  ridges 
  on 
  the 
  palm 
  separated 
  by 
  wide 
  interspaces, 
  and 
  

   the 
  fingers 
  strongly 
  arcuated. 
  

  

  18. 
  Porcellana 
  nitida, 
  Haswell, 
  var. 
  rotundifrons. 
  

   (Plate 
  XXX. 
  fig. 
  B.) 
  

  

  Carapace 
  smooth, 
  shining, 
  everywhere 
  striated 
  ; 
  the 
  striae 
  short 
  

   and 
  interrupted. 
  The 
  front 
  is 
  rather 
  prominent, 
  transverse, 
  and 
  

   very 
  obscurely 
  3-lobed 
  ; 
  the 
  median 
  lobe 
  very 
  broad 
  and 
  rounded 
  ; 
  

   the 
  lateral 
  lobes 
  (or 
  inner 
  orbital 
  angles) 
  also 
  rounded 
  and 
  small. 
  

   Behind 
  the 
  outer 
  orbital 
  angle, 
  which 
  is 
  dentiform, 
  is 
  a 
  second 
  acute 
  

   tooth, 
  and 
  behind 
  this 
  a 
  rounded 
  prominence 
  ; 
  there 
  is 
  a 
  small 
  tooth 
  

   on 
  the 
  subhepatic 
  region. 
  The 
  basal 
  joint 
  of 
  the 
  antennae 
  is 
  very 
  

   short, 
  the 
  second 
  and 
  third 
  longer, 
  and 
  the 
  fourth 
  very 
  short 
  ; 
  the 
  

   flagellum 
  naked 
  ; 
  the 
  ischium-joint 
  of 
  the 
  outer 
  maxillipedes 
  has 
  a 
  

   spine 
  on 
  its 
  outer 
  margin 
  ; 
  the 
  inner 
  margin 
  of 
  the 
  merus 
  is 
  pro- 
  

   duced 
  into 
  a 
  thin 
  lobe 
  at 
  base, 
  the 
  following 
  joint 
  is 
  robust. 
  The 
  

   chelipedes 
  are 
  robust 
  and 
  elongated, 
  the 
  joints 
  are 
  smooth 
  ; 
  the 
  

   arm 
  and 
  wrist 
  have 
  their 
  inner 
  margins 
  cristiform 
  and 
  acute 
  and 
  

   entire 
  ; 
  the 
  arm 
  is 
  very 
  short, 
  the 
  wrist 
  somewhat 
  longer 
  ; 
  the 
  

   larger 
  palm 
  (in 
  an 
  adult 
  male) 
  is 
  robust 
  and 
  considerably 
  elongated, 
  

   its 
  upper 
  margin 
  rounded 
  ; 
  the 
  fingers 
  are 
  shorter 
  than 
  the 
  palm, 
  

  

  * 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philad. 
  p. 
  225 
  (1858). 
  

  

  