﻿CRUSTACEA. 
  283 
  

  

  joints 
  of 
  the 
  flagella 
  almost 
  naked. 
  The 
  scale 
  at 
  base 
  of 
  the 
  an- 
  

   tennae 
  is 
  acuminate 
  at 
  its 
  distal 
  end, 
  and 
  between 
  it 
  and 
  the 
  peduncle 
  

   is 
  a 
  strong 
  spine, 
  which 
  is 
  apparently. 
  articulated 
  with 
  tlie 
  ante- 
  

   penultimate 
  peduncular 
  joint. 
  The 
  outer 
  maxillipedes 
  are 
  subpedi- 
  

   form, 
  and 
  the 
  joints 
  are 
  hairy 
  on 
  their 
  inner 
  margins. 
  The 
  anterior 
  

   legs 
  are 
  wanting 
  in 
  the 
  single 
  specimen 
  I 
  have 
  seen 
  ; 
  the 
  three 
  

   following 
  legs 
  have 
  the 
  joints 
  somewhat 
  compressed 
  ; 
  the 
  merus 
  and 
  

   carpus 
  in 
  the 
  second 
  legs 
  are 
  somewhat 
  dilated 
  and 
  fringed 
  below 
  

   with 
  loi]g 
  hairs, 
  the 
  palm 
  forming 
  with 
  the 
  dactyl 
  a 
  perfect 
  chela, 
  

   the 
  fingers 
  of 
  which 
  are 
  acute 
  and 
  meet 
  along 
  the 
  inner 
  edges 
  ; 
  

   the 
  following 
  legs 
  are 
  not 
  subchelate 
  ; 
  the 
  palm 
  in 
  the 
  third 
  pair 
  

   is 
  ovate, 
  fringed 
  with 
  short 
  stiff 
  hairs 
  below 
  and 
  on 
  the 
  sides, 
  

   dactyl 
  very 
  short 
  ; 
  in 
  the 
  fourth 
  pair 
  the 
  palm 
  is 
  somewhat 
  slen- 
  

   derer 
  and 
  more 
  elongated, 
  more 
  thickly 
  clothed 
  towards 
  its 
  distal 
  

   end 
  with 
  plumose 
  hairs 
  ; 
  the 
  fifth 
  legs 
  are 
  shorter 
  and 
  comparatively 
  

   slender 
  and 
  feeble. 
  The 
  postabdominal 
  appendages 
  are 
  biramose, 
  

   the 
  inner 
  larger 
  than 
  the 
  outer 
  branch. 
  The 
  rami 
  of 
  the 
  uropoda 
  

   are 
  somewhat 
  indurated 
  aud 
  .considerably 
  dilated 
  ; 
  their 
  distal 
  mar- 
  

   gins 
  are 
  straight, 
  ciliated, 
  aud 
  minutely 
  spinulose, 
  and 
  they 
  reach 
  

   to 
  the 
  end 
  of 
  the 
  terminal 
  segment 
  of 
  the 
  postabdomen. 
  Colour 
  

   (in 
  spirit) 
  whitish. 
  Length 
  about 
  1 
  inch 
  4^ 
  lines 
  (35 
  milHm.). 
  

  

  The 
  single 
  example 
  collected, 
  which 
  is, 
  I 
  think, 
  a 
  male, 
  was 
  ob- 
  

   tained 
  on 
  the 
  beach 
  between 
  tide-marks 
  at 
  Port 
  Molle 
  (Xo. 
  103), 
  

   and 
  is 
  in 
  very 
  imperfect 
  condition. 
  

  

  Although 
  the 
  anterior 
  legs 
  are 
  wanting 
  in 
  this 
  specimen, 
  there 
  can, 
  

   I 
  think, 
  be 
  no 
  doubt 
  of 
  its 
  generic 
  position. 
  

  

  4. 
  Tlialassina 
  anomala 
  (Herhst). 
  

  

  To 
  this 
  species 
  probably 
  belongs 
  a 
  female 
  of 
  rather 
  small 
  size 
  

   from 
  Thursday 
  Island, 
  obtained 
  in 
  the 
  mangrove-swamps 
  (No. 
  124). 
  

  

  In 
  this 
  specimen 
  tlie 
  chelipedes 
  are 
  of 
  nearly 
  equal 
  size, 
  and 
  both 
  

   chelae 
  are 
  as 
  slender 
  and 
  as 
  much 
  elongated 
  as 
  is 
  the 
  smaller 
  chela 
  

   in 
  the 
  adult 
  T. 
  aaomahi, 
  and 
  are 
  strongly 
  spinulose 
  on 
  their 
  upper 
  

   margins. 
  

  

  The 
  examination 
  of 
  this 
  specimen 
  induces 
  me 
  to 
  regard 
  certain 
  small 
  

   examples 
  (of 
  both 
  sexes) 
  from 
  Borneo, 
  Singapore, 
  and 
  the 
  Indian 
  

   Ocean 
  which 
  I 
  formerly 
  * 
  referred 
  to 
  T. 
  anomala, 
  and 
  which 
  have 
  

   a 
  more 
  broadly 
  triangulate 
  rostrum, 
  and 
  the 
  upper 
  margins 
  of 
  the 
  

   wrists 
  and 
  hands 
  of 
  the 
  chelipedes 
  armed 
  Avith 
  much 
  smaller 
  spinules 
  

   along 
  their 
  upper 
  margins, 
  as 
  probably 
  referable 
  to 
  a 
  distinct 
  species. 
  

   White's 
  T. 
  talpa, 
  however, 
  is, 
  as 
  I 
  have 
  already 
  stated, 
  probably 
  a 
  

   young 
  T. 
  anomala. 
  

  

  To 
  the 
  localities 
  mentioned 
  in 
  my 
  paper 
  referred 
  to 
  above 
  is 
  to 
  be 
  

   added 
  Nicol 
  Bay, 
  N.W. 
  Australia, 
  whence 
  the 
  Museum 
  possesses 
  a 
  

   small 
  mutilated 
  example 
  (31. 
  du 
  Boulay). 
  

  

  Perhaps 
  the 
  species 
  described 
  by 
  Hess 
  t 
  from 
  Sydney 
  as 
  T. 
  max- 
  

   ima 
  is 
  to 
  be 
  regarded 
  merely 
  as 
  a 
  variety 
  of 
  T. 
  anomala. 
  

  

  * 
  Ann. 
  & 
  Mag. 
  Nat. 
  Hist. 
  ser. 
  6, 
  v. 
  p. 
  377 
  (1880). 
  

  

  t 
  Arcliiv 
  f. 
  >;aturgesehichte, 
  xxxi. 
  p. 
  163, 
  pi. 
  \ii. 
  fig. 
  18 
  (1865). 
  

  

  