﻿190 
  COLLECIIONS 
  FROM 
  MELANESIA. 
  

  

  4. 
  Oncinopus 
  aranea. 
  

  

  De 
  Haan, 
  Faun. 
  Jajjon., 
  Crust, 
  p. 
  100, 
  pi. 
  xxix. 
  fig. 
  2 
  (d 
  ?), 
  and 
  

  

  pi. 
  H 
  (1839). 
  

   Oncinopus 
  neptuniis, 
  Adams 
  Sj- 
  White, 
  Zool. 
  ^ 
  Samarang,^ 
  Crust, 
  p. 
  1, 
  

  

  pi. 
  ii. 
  fig. 
  1 
  (1848). 
  

   Oncinopus 
  subpellucidus, 
  Stimpson, 
  Proc. 
  Ac. 
  Nat. 
  Sci. 
  Pkilad. 
  p. 
  221 
  

  

  (1857) 
  ; 
  Haswell, 
  Cat. 
  Austrcdian 
  Stalk- 
  and 
  Sessile-eyed 
  Crust, 
  p. 
  5 
  

  

  (1882). 
  

   ■ 
  Oncinopus 
  angulatus, 
  Haswell, 
  Proc. 
  Litm. 
  Soc, 
  N. 
  S. 
  Wales, 
  iv. 
  

  

  p. 
  43.3 
  (1880). 
  

  

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

   (No. 
  104), 
  and 
  Port 
  Molle, 
  14 
  fms. 
  (No. 
  93). 
  Besides 
  the 
  above 
  

   specimens 
  the 
  British-Museum 
  series 
  includes 
  examples 
  from 
  Port 
  

   Jackson 
  (J. 
  Brazier 
  cf-c), 
  from 
  Brisbane 
  Water, 
  Queensland 
  (Mac- 
  

   gillivray, 
  H.M.S. 
  ' 
  Rattlesnake 
  '), 
  from 
  the 
  Mindoro 
  Sea 
  {A. 
  Adams, 
  

   H.M.S. 
  ' 
  Samarang 
  '), 
  and 
  from 
  the 
  New 
  Hebrides 
  (J.Macr/iUivraif). 
  

  

  Oncinoi)us 
  subpellucidus, 
  Stimpson, 
  from 
  Port 
  Jackson, 
  only 
  differs 
  

   (according 
  to 
  its 
  author) 
  from 
  0. 
  neptunus 
  in 
  the 
  somewhat 
  smaller 
  

   and 
  slenderer 
  terminal 
  and 
  penultimate 
  joints 
  of 
  the 
  posterior 
  legs, 
  

   and 
  can 
  scarcely 
  be 
  regarded 
  as 
  distinct, 
  Onciuojnis 
  nraneus 
  of 
  

   De 
  Haan 
  (the 
  species 
  on 
  which 
  the 
  genus 
  was 
  originally 
  founded) 
  

   was 
  regarded 
  by 
  Adams 
  and 
  White 
  as 
  distinct 
  from 
  0. 
  neptunus, 
  on 
  

   account 
  of 
  the 
  much 
  shorter 
  legs, 
  more 
  deeply-incised 
  front, 
  with 
  

   more 
  angulated 
  lobes 
  ; 
  but 
  there 
  is 
  an 
  adult 
  specimen 
  from 
  Port 
  

   Jackson, 
  in 
  Dr. 
  Coppinger's 
  collection, 
  in 
  which 
  the 
  legs 
  are 
  only 
  

   twice 
  as 
  long 
  as 
  the 
  carapace, 
  and 
  quite 
  as 
  robust 
  as 
  in 
  De 
  Haan's 
  

   figure 
  of 
  0. 
  araneus 
  ; 
  and 
  in 
  a 
  male 
  from 
  Brisbane 
  Water, 
  (Queens- 
  

   land, 
  in 
  the 
  Museum 
  collection, 
  the 
  chelipedes 
  have 
  their 
  palms 
  

   dilated, 
  just 
  as 
  in 
  the 
  Japanese 
  species. 
  In 
  consideration 
  of 
  the 
  

   evident 
  variability 
  of 
  the 
  length 
  and 
  robustness 
  of 
  the 
  legs 
  in 
  this 
  

   genus, 
  I 
  have 
  considered 
  it 
  necessary 
  to 
  unite 
  all 
  the 
  described 
  

   species 
  under 
  De 
  Haan's 
  original 
  designation, 
  0. 
  araneus. 
  

  

  5. 
  Mensethius 
  monoceros 
  (Latr.). 
  

  

  A 
  male 
  is 
  in 
  the 
  collection 
  from 
  Port 
  Denison, 
  (Queensland, 
  4 
  fms. 
  

   (No. 
  111). 
  I 
  have 
  in 
  a 
  previous 
  Peport* 
  remarked 
  upon 
  the 
  wide 
  

   distribution 
  of 
  this 
  common 
  Oriental 
  species, 
  and 
  for 
  the 
  numerous 
  

   synonyma 
  would 
  refer 
  to 
  A. 
  Milne-Edwards's 
  report 
  on 
  the 
  Crustacea 
  

   of 
  New 
  Caledonia 
  f. 
  

  

  A 
  female 
  received 
  in 
  Dr. 
  Coppinger's 
  second 
  collection 
  from 
  Prince 
  

   of 
  Wales 
  Channel 
  (No. 
  KiO) 
  differs 
  widely 
  in 
  its 
  broader, 
  much 
  more 
  

   strongly 
  tuberculated 
  carapace 
  from 
  the 
  male 
  from 
  Port 
  Denison 
  ; 
  

   in 
  these 
  particulars 
  it 
  closely 
  resembles 
  specimens 
  from 
  the 
  Mauritius 
  

   in 
  the 
  British-Museum 
  collection. 
  Specimens 
  from 
  Shark 
  Bay, 
  West 
  

   Australia 
  {Surgeon 
  Rayner, 
  H.M.S. 
  ' 
  Herald 
  ') 
  nearly 
  approach 
  the 
  

   Mauritius 
  specimens 
  in 
  these 
  particulars. 
  

  

  * 
  Philosoph. 
  Trans. 
  Eoy. 
  Soe. 
  clxviii. 
  p. 
  485 
  (1879). 
  

  

  t 
  Vide 
  Nouv. 
  Arcliiv. 
  Mus. 
  Hist. 
  Nat. 
  viii. 
  p. 
  252 
  (1872). 
  

  

  