﻿ECHINODERMATA, 
  133 
  

  

  there 
  is 
  a 
  closer 
  and 
  more 
  regular 
  granulation. 
  The 
  coloration, 
  

   which 
  becomes 
  blotched 
  in 
  the 
  dried 
  specimens, 
  is 
  found 
  in 
  an 
  ex- 
  

   ample 
  sent 
  by 
  Dr. 
  Coppinger 
  to 
  consist 
  of 
  an 
  irregular 
  darkish 
  patch 
  

   at 
  each 
  angle 
  of 
  the 
  disk, 
  and 
  an 
  irregular 
  patch, 
  extending 
  on 
  to 
  the 
  

   marginal 
  plates, 
  occurs 
  twice 
  on 
  the 
  length 
  of 
  each 
  arm. 
  

  

  In 
  a 
  much 
  smaller 
  specimen 
  (in 
  which 
  R 
  = 
  9} 
  the 
  spines 
  are 
  only 
  

   developed 
  on 
  one 
  plate 
  on 
  either 
  side 
  of 
  the 
  apex 
  of 
  the 
  angle 
  of 
  

   the 
  arm, 
  and 
  only 
  two 
  distinct 
  spines 
  are 
  to 
  be 
  seen 
  on 
  the 
  ventral 
  

   plates. 
  In 
  a 
  specimen 
  in 
  which 
  E.= 
  16 
  the 
  second 
  spine 
  is 
  fairly 
  

   developed 
  on 
  some, 
  small 
  on 
  otherr., 
  and 
  absent 
  from 
  the 
  rest 
  of 
  the 
  

   plates 
  nearest 
  but 
  one 
  to 
  the 
  apex 
  ; 
  on 
  all 
  of 
  the 
  ventral 
  plates 
  a 
  

   third, 
  and 
  on 
  some 
  the 
  fourth, 
  spine 
  is 
  now 
  to 
  be 
  made 
  out. 
  

  

  Of 
  several 
  specimens 
  collected 
  at 
  Alert 
  Island 
  one 
  has 
  at 
  some 
  of 
  

   its 
  angles 
  three 
  spine-bearing 
  plates. 
  

  

  In 
  addition 
  to 
  the 
  specimens 
  from 
  Thursday 
  Island, 
  Alert 
  Island, 
  

   and 
  Prince 
  of 
  Wales 
  Channel 
  (7 
  fms.), 
  the 
  British 
  Museum 
  con- 
  

   tains 
  three 
  specimens 
  which 
  were 
  collected 
  in 
  " 
  Australia 
  " 
  by 
  

   Macgillivray 
  in 
  1S62. 
  

  

  29. 
  Astropecten 
  polyacanthus. 
  

  

  M. 
  <§• 
  Tr. 
  p. 
  69. 
  

  

  A 
  fine 
  series 
  of 
  ten 
  specimens 
  were 
  taken 
  in 
  0-5 
  fms., 
  at 
  Port 
  

   Jackson. 
  In 
  the 
  case 
  of 
  two 
  examples 
  there 
  are 
  three 
  spineless 
  

   ossicles 
  succeeding 
  the 
  plate 
  at 
  the 
  angle 
  of 
  the 
  arm 
  ; 
  in 
  all 
  the 
  

   other 
  cases 
  the 
  more 
  ordinary 
  condition 
  of 
  two 
  such 
  ossicles 
  only 
  is 
  

   found 
  to 
  obtain. 
  The 
  smallest 
  specimen 
  has 
  E. 
  equal 
  to 
  15 
  millim., 
  

   and 
  the 
  largest 
  H 
  equal 
  to 
  36 
  millim. 
  Some 
  variability 
  is 
  to 
  be 
  

   noted 
  in 
  the 
  tenuity 
  of 
  the 
  arms. 
  

  

  30. 
  Archaster 
  typicus. 
  

   M. 
  ^ 
  Tr. 
  p. 
  65. 
  

   Three 
  dried 
  specimens 
  from 
  Port 
  Denison, 
  4 
  fms. 
  

  

  EETASTER. 
  

  

  PeiTier, 
  JVouv. 
  Arch, 
  du 
  Mus. 
  (2) 
  i. 
  p. 
  55*. 
  

  

  31. 
  Eetaster 
  insignis. 
  

  

  Sladen, 
  J. 
  Linn. 
  Soc, 
  Zool. 
  xvi. 
  p. 
  200. 
  

  

  On 
  receiving 
  these 
  specimens 
  I 
  recognized 
  that 
  they 
  were 
  repre- 
  

   sentatives 
  of 
  a 
  species 
  then 
  undescribed 
  ; 
  since 
  that 
  time, 
  however, 
  

   an 
  account 
  of 
  the 
  species 
  has 
  been 
  published 
  by 
  Mr. 
  Sladen 
  in 
  his 
  

   Preliminary 
  Notice 
  of 
  the 
  ' 
  Challenger 
  ' 
  Collection. 
  The 
  foUow- 
  

  

  * 
  I 
  am 
  indebted 
  to 
  Mr. 
  W. 
  Percy 
  Slnd^n 
  for 
  this 
  reference. 
  

  

  