﻿264 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  6. 
  Pagurus 
  imbricatus, 
  M.-Edtv. 
  

  

  A 
  specimen 
  which 
  I 
  believe 
  to 
  be 
  an 
  adult 
  male 
  is 
  referred 
  here 
  

   from 
  Thursday 
  Island, 
  3-4 
  fms. 
  (No. 
  145), 
  an 
  adult 
  female 
  from 
  the 
  

   same 
  locality 
  and 
  depth 
  (No. 
  175), 
  and 
  a 
  smaller 
  male 
  from 
  Prince 
  of 
  

   Wales 
  Channel, 
  9 
  fms. 
  (No. 
  157). 
  

  

  Specimens 
  also 
  are 
  in 
  the 
  British-Museum 
  collection 
  from 
  Shark 
  

   Bay, 
  W. 
  Australia 
  {Bcajner, 
  H.M.S. 
  ' 
  Herald 
  '). 
  

  

  The 
  smaller 
  examples 
  agree 
  very 
  well 
  with 
  Milne-Edwards's 
  brief 
  

   description*. 
  As, 
  however, 
  the 
  animal 
  increases 
  in 
  size, 
  small 
  

   granules 
  or 
  prominences 
  are 
  developed 
  upon 
  the 
  anterior 
  margins 
  of 
  

   the 
  flattened 
  tubercles 
  or 
  scales 
  of 
  the 
  outer 
  surface 
  of 
  the 
  left 
  

   chelipede, 
  which 
  in 
  the 
  male 
  from 
  I'hursday 
  Island 
  are 
  large 
  enough 
  

   to 
  give 
  it 
  a 
  uniformly 
  granulated 
  appearance. 
  

  

  7. 
  Pagurus 
  hessii. 
  (Plate 
  XXVIII. 
  fig. 
  A.) 
  

  

  Carapace 
  depressed, 
  with 
  a 
  few 
  hairs 
  on 
  the 
  sides 
  near 
  the 
  front, 
  

   the 
  cervical 
  suture 
  distinctly 
  defined; 
  the 
  branchial 
  regions 
  but 
  

   moderately 
  dilated 
  on 
  the 
  sides 
  ; 
  with 
  no 
  m.edian 
  rostral 
  tooth, 
  but 
  

   with 
  the 
  lateral 
  frontal 
  teeth 
  (situated 
  just 
  outside 
  of 
  the 
  bases 
  of 
  

   the 
  eye-peduncles) 
  triangulate 
  and 
  subacute; 
  lateral 
  margins 
  with- 
  

   out 
  spines. 
  Ophthalmic 
  segment, 
  between 
  the 
  eyes, 
  completely 
  

   uncovered. 
  Terminal 
  postabdominal 
  segment 
  divided 
  by 
  a 
  median 
  

   notch 
  into 
  two 
  unequal 
  rounded 
  lobes. 
  Eye-peduncles 
  robust, 
  in 
  

   the 
  adult 
  shorter 
  than 
  the 
  width 
  of 
  the 
  front, 
  with 
  the 
  cornesB 
  

   considerably 
  dilated 
  ; 
  tlieir 
  basal 
  scales 
  with 
  a 
  rounded 
  lobe 
  on 
  their 
  

   outer 
  margins, 
  and 
  with 
  their 
  apices 
  subtruncated 
  and 
  armed 
  with 
  

   two 
  or 
  three 
  spinules. 
  The 
  peduncles 
  of 
  the 
  anteunules 
  in 
  the 
  adult 
  

   scarcely 
  reach 
  to 
  the 
  end 
  of 
  the 
  eye-peduncles 
  ; 
  the 
  antepenultimate 
  

   and 
  penultimate 
  joints 
  of 
  the 
  peduncles 
  of 
  the 
  antenn£e 
  each 
  bear 
  a 
  

   small 
  spinu.le 
  above, 
  besides 
  the 
  longer 
  acicidum 
  which 
  projects 
  from 
  

   the 
  dorsal 
  surface 
  of 
  the 
  penultimate 
  joint, 
  which 
  has 
  one 
  or 
  two 
  

   smaller 
  spinules 
  on 
  its 
  inner 
  margin; 
  the 
  joints 
  of 
  the 
  antennal 
  

   flagella 
  are 
  almost 
  naked. 
  The 
  coxae 
  of 
  the 
  outer 
  maxillipedes 
  and 
  

   chelipedes 
  are 
  almost 
  contiguous. 
  The 
  chelipedes 
  are 
  nearly 
  equal 
  

   and 
  of 
  moderate 
  size 
  ; 
  the 
  merus-joints 
  trigonous, 
  the 
  margins 
  (in 
  

   the 
  adult) 
  armed 
  with 
  a 
  few 
  spinules 
  toward 
  the 
  distal 
  extremity 
  ; 
  

   upper 
  and 
  outer 
  surface 
  of 
  the 
  wrists 
  scantily 
  hairy 
  and 
  spinulose, 
  

   the 
  spinules 
  arranged 
  in 
  three 
  longitudinal 
  series; 
  palms 
  rather 
  

   turgid, 
  about 
  as 
  long 
  as 
  the 
  fingers, 
  spinulose 
  and 
  hairy, 
  the 
  spinules 
  

   smaller 
  and 
  more 
  crowded 
  below, 
  larger 
  and 
  more 
  distinctly 
  longi- 
  

   tudinally 
  seriate 
  on 
  the 
  upper 
  and 
  outer 
  margins 
  ; 
  fingers 
  spinulose 
  

   and 
  hairy, 
  with 
  subexcavate 
  dark 
  corneous 
  tips, 
  and 
  opening 
  some- 
  

   what 
  obliquely. 
  The 
  last 
  three 
  joints 
  of 
  the 
  first 
  and 
  second 
  ambu- 
  

   latorj'legs 
  are 
  hairy 
  and 
  spinulose 
  above; 
  the 
  terminal 
  joints 
  slender, 
  

   longer 
  than 
  the 
  preceding, 
  and 
  externally 
  longitudinally 
  caualiculated 
  

   on 
  the 
  inner 
  surface, 
  bearing 
  a 
  series 
  of 
  oblique 
  sulci 
  which 
  are 
  

   bordered 
  with 
  hairs. 
  Both 
  the 
  fourth 
  and 
  fifth 
  legs 
  are 
  chelate 
  ; 
  

  

  * 
  Ann. 
  Fci. 
  Nat. 
  ser. 
  3, 
  Zool. 
  x. 
  p. 
  61 
  (1848). 
  

  

  