﻿CRtrSTACEA. 
  193' 
  

  

  Other 
  specimens 
  of 
  this 
  species 
  are 
  in 
  the 
  British 
  Museum 
  from 
  

   Moreton 
  Bay 
  (purchased), 
  and 
  from 
  the 
  collection 
  of 
  H.M.S. 
  

   ' 
  Saraarang,' 
  without 
  precise 
  indication 
  of 
  locality. 
  

  

  The 
  spines 
  of 
  the 
  carapace 
  vary 
  considerably 
  in 
  number 
  and 
  

   length 
  ; 
  in 
  an 
  adult 
  female 
  from 
  Moreton 
  Bay 
  the 
  two 
  posterior 
  

   spines 
  of 
  the 
  carapace 
  are 
  absent 
  ; 
  in 
  a 
  small 
  male 
  from 
  the 
  same 
  

   locality 
  both 
  are 
  present, 
  although 
  very 
  small 
  ; 
  in 
  Dr. 
  Coppinger's 
  

   specimens 
  one 
  only 
  is 
  developed. 
  In 
  none 
  of 
  the 
  specimens 
  I 
  have 
  

   examined 
  are 
  the 
  spines 
  of 
  the 
  carapace 
  knobbed 
  at 
  the 
  tip. 
  

   These 
  specimens 
  principally 
  differ 
  from 
  Haswell's 
  description 
  in 
  

   having 
  but 
  a 
  single 
  broad 
  and 
  usually 
  dentated 
  lobe 
  behind 
  the 
  

   three 
  straight, 
  acute, 
  spinous 
  teeth 
  of 
  the 
  upper 
  orbital 
  border, 
  as 
  in 
  

   He 
  Haan's 
  figure 
  of 
  P. 
  longispinus. 
  They 
  are 
  only 
  distinguished 
  

   from 
  P. 
  lonrjispinus 
  by 
  the 
  form 
  of 
  the 
  hands 
  of 
  the 
  chelipedes, 
  the 
  

   palms 
  (alike 
  in 
  males 
  and 
  females) 
  being 
  slenderer, 
  with 
  the 
  upper 
  

   margins 
  straight, 
  and 
  the 
  fingers 
  straight 
  and 
  meeting 
  along 
  their 
  

   inner 
  edges, 
  which 
  are 
  entire, 
  without 
  spines 
  or 
  tubercles 
  on 
  their 
  

   inner 
  margins. 
  It 
  is 
  not 
  stated 
  if 
  this 
  character 
  exists 
  in 
  the 
  types 
  

   of 
  P. 
  copjrinr/eri; 
  and 
  I 
  am 
  therefore 
  somewhat 
  doubtful 
  if 
  our 
  speci- 
  

   mens 
  belong 
  to 
  that 
  species, 
  which 
  may 
  after 
  all 
  be 
  synonymous 
  

   with 
  P. 
  lom/ispinus. 
  In 
  the 
  latter 
  event 
  the 
  Museum 
  examples 
  

   referred 
  to 
  P. 
  eopjnngeri 
  would 
  apparently 
  require 
  a 
  distinct 
  

   specific 
  appellation. 
  

  

  10. 
  Paramithrax 
  (Chlorinoides) 
  aculeatus, 
  var. 
  armatus. 
  

   (Plate 
  XVIII. 
  fig. 
  A.) 
  

  

  I 
  thus 
  designate 
  a 
  series 
  of 
  specimens 
  in 
  the 
  collection 
  which 
  

   apparentl}^ 
  approach 
  so 
  nearly 
  the 
  Chorinus 
  aculeatus 
  of 
  Milne- 
  

   Edwards 
  as 
  to 
  render 
  it 
  unadvisable 
  to 
  separate 
  them 
  specifically 
  

   in 
  the 
  absence 
  of 
  figures 
  of 
  G. 
  aculeatus. 
  As 
  Milne-Edwards's 
  

   description* 
  is 
  somewhat 
  brief, 
  I 
  subjoin 
  the 
  following 
  description 
  

   of 
  an 
  adult 
  example 
  in 
  Dr. 
  Coppinger's 
  collection 
  : 
  — 
  

  

  CarajDace 
  more 
  or 
  less 
  pubescent, 
  subpyriform, 
  moderately 
  convex, 
  

   with 
  five 
  spines 
  arranged 
  in 
  a 
  median 
  longitudinal 
  series, 
  of 
  which 
  two 
  

   are 
  situate 
  on 
  the 
  gastric, 
  one 
  on 
  the 
  cardiac, 
  and 
  one 
  on 
  the 
  intestinal 
  

   region, 
  and 
  one 
  on 
  the 
  posterior 
  margin 
  ; 
  there 
  are 
  also 
  two 
  strong 
  and 
  

   outwardly-divergent 
  spines 
  on 
  each 
  of 
  the 
  branchial 
  regions. 
  The 
  

   rostral 
  spines 
  are 
  long, 
  acute, 
  curving 
  outward, 
  and 
  separate! 
  from 
  

   one 
  another, 
  even 
  at 
  their 
  bases, 
  by 
  a 
  distinct 
  interspace 
  ; 
  the 
  upper 
  

   orbital 
  margia 
  has 
  two 
  deep 
  fissures 
  ; 
  the 
  praeocular 
  spine 
  is 
  strong 
  

   and 
  curves 
  upward 
  ; 
  there 
  is 
  also 
  a 
  strong 
  postocular 
  spine, 
  which 
  

   has 
  a 
  tooth 
  on 
  its 
  posterior 
  margin 
  ; 
  posterior 
  to 
  this, 
  on 
  the 
  sides 
  

   of 
  the 
  carapace, 
  is 
  another 
  small 
  spine. 
  On 
  the 
  inferior 
  surface 
  of 
  

   the 
  carapace 
  (on 
  the 
  pterygostomian 
  region^ 
  are 
  three 
  tubercles 
  

   arranged 
  in 
  an 
  oblique 
  line 
  ; 
  and 
  posterior 
  and 
  parallel 
  to 
  these 
  an 
  

   oblique 
  crest, 
  which 
  terminates 
  in 
  a 
  tooth 
  or 
  short 
  spine. 
  There 
  is 
  

   a 
  strong 
  tooth 
  directed 
  downward 
  on 
  the 
  interantennal 
  septum, 
  and 
  

  

  * 
  Vide 
  Hist. 
  Nat. 
  Crust, 
  i. 
  p. 
  316 
  (1834). 
  

  

  