﻿188 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  Caprella 
  (sqm'h'bra 
  (Say). 
  E. 
  Australia 
  (Port 
  Jackson) 
  ; 
  New 
  Zealand 
  ; 
  

   Hong 
  Kong- 
  ; 
  Mediterranean 
  ; 
  Norway 
  ; 
  Britain 
  ; 
  E. 
  coast 
  of 
  

   United 
  States 
  ; 
  Brazil. 
  

   * 
  attennata, 
  Dana? 
  E. 
  Australia 
  (Port 
  Jackson); 
  Eio 
  de 
  Janeiro, 
  

  

  OsTEACODA. 
  

  

  Cypridina 
  alho-macnlata, 
  Baird. 
  N. 
  Australia 
  (Port 
  Darwin, 
  Dundas 
  

   Straits) 
  ; 
  W. 
  Australia 
  (Swan 
  Eiver). 
  

  

  CIEEIPEDIA. 
  

  

  Balanus 
  trigonus, 
  Darwin. 
  E. 
  Australia 
  (Port 
  Jackson 
  and 
  Sydney) 
  ; 
  

  

  New 
  Zealand 
  ; 
  Malaysian 
  seas 
  ; 
  W. 
  coast 
  of 
  America 
  ; 
  Peru 
  ; 
  

  

  Columbia 
  ; 
  California. 
  

   amaryllis, 
  Darwin. 
  N. 
  to 
  E. 
  Australia 
  (Port 
  Darwin 
  to 
  Moreton 
  

  

  Bay) 
  ; 
  Philippines 
  ; 
  Malaysian 
  archipelago 
  ; 
  mouth 
  of 
  the 
  Indus. 
  

   Acasta 
  sulcata, 
  Lam. 
  (var. 
  ?). 
  N. 
  to 
  E. 
  Australia 
  (Albany 
  Island 
  to 
  

  

  Moreton 
  Bay) 
  ; 
  S. 
  Australia 
  ; 
  W. 
  Australia 
  {Lajnarck). 
  

  

  PYCNOGONIDA. 
  

  

  Achelia 
  Icevis, 
  Hodge, 
  var. 
  australiensis, 
  n. 
  E. 
  Australia 
  (Port 
  Jackson). 
  

   PhoxicJdlidium 
  hoekii, 
  sp. 
  n. 
  N. 
  Australia 
  (Dundas 
  Straits, 
  Thursday 
  

   Island, 
  Prince 
  of 
  Wales 
  Channel) 
  . 
  

  

  DECAPODA. 
  

   BEACHYUEA. 
  

  

  1. 
  Achseus 
  lacertosus, 
  Stimpson. 
  

  

  Here 
  is 
  somewhat 
  doubtfully 
  referred 
  a 
  small 
  male 
  specimen 
  from 
  

   Port 
  Jackson 
  (0-5 
  fms.), 
  which 
  difi'ers 
  from 
  Stimpson's 
  diagnosis 
  

   only 
  in 
  the 
  somewhat 
  slenderer 
  merus-joint 
  of 
  the 
  chelipedes, 
  which 
  

   resembles 
  that 
  of 
  A. 
  hreviceps, 
  Haswell 
  (a 
  species 
  which 
  Mr. 
  Haswell 
  

   in 
  his 
  latest 
  work 
  regards 
  as 
  synonymous 
  with 
  A. 
  lacertosas), 
  in 
  being 
  

   of 
  a 
  somewhat 
  trigonous 
  form 
  ; 
  the 
  palm 
  or 
  penultimate 
  joint 
  is 
  

   thin-edged 
  along 
  its 
  upper 
  margin, 
  but 
  scarcely 
  carinatcd. 
  

  

  The 
  specimen 
  I 
  refer 
  to 
  A. 
  lacertosus 
  also 
  bears 
  some 
  resemblance 
  

   to 
  the 
  European 
  A. 
  cranchii 
  in 
  the 
  absence 
  of 
  a 
  neck-like 
  constriction 
  

   behind 
  the 
  orbits, 
  and 
  in 
  the 
  comparatively 
  short 
  ambulatory 
  legs, 
  the 
  

   dactyli 
  of 
  the 
  last 
  three 
  pairs 
  being 
  rather 
  strongly 
  falciform. 
  In 
  A. 
  

   cranchii, 
  however, 
  the 
  eye-peduncles 
  have 
  a 
  tubercle 
  on 
  their 
  anterior 
  

   margin, 
  the 
  distal 
  end 
  of 
  the 
  merus 
  of 
  the 
  outer 
  maxillipedes 
  is 
  more 
  

   distinctly 
  truncated, 
  and 
  the 
  ambulatory 
  legs 
  are 
  even 
  shorter. 
  

  

  In 
  the 
  second 
  collection 
  received 
  from 
  Dr. 
  Coppinger 
  are 
  two 
  

   females 
  from 
  Dundas 
  Strait, 
  North 
  Australia 
  (No. 
  161), 
  which 
  

   scarcely 
  differ, 
  except 
  in 
  the 
  somewhat 
  broader 
  carapace. 
  

  

  2. 
  Achseus 
  affinis. 
  

  

  Carapace 
  subtriangular 
  and 
  moderately 
  convex, 
  with 
  the 
  surface 
  

   uneven, 
  but 
  the 
  regions 
  not 
  very 
  distinctly 
  defined 
  ; 
  the 
  postorbital 
  

   region 
  is 
  constricted. 
  The 
  rostrum 
  is 
  moderately 
  prominent, 
  the 
  

  

  