﻿ECHINODEEMATA. 
  121 
  

  

  of 
  20*5 
  millim. 
  and 
  is 
  12 
  millim. 
  high 
  ; 
  the 
  abactinal 
  area 
  is 
  4-5 
  and 
  

   the 
  anal 
  area 
  is 
  2 
  millim. 
  in 
  diameter. 
  The 
  short 
  primary 
  spines, 
  

   which, 
  as 
  in 
  the 
  other 
  specimens, 
  have 
  two 
  or 
  three 
  short 
  bands 
  of 
  

   bright 
  red 
  on 
  their 
  white 
  surface, 
  have 
  the 
  neighbouring 
  suckers 
  of 
  

   a 
  purplish-slate 
  colour, 
  and 
  these 
  give 
  a 
  deeper 
  and 
  richer 
  appear- 
  

   ance 
  than 
  ordinary 
  to 
  the 
  test. 
  The 
  abactinal 
  area 
  is 
  not 
  so 
  con- 
  

   spicuous 
  as 
  in 
  the 
  smaller 
  specimens, 
  and 
  only 
  one 
  of 
  the 
  genital 
  

   plates 
  has 
  more 
  than 
  three 
  tubercles. 
  

  

  Thursday 
  Island 
  ; 
  Prince 
  of 
  Wales 
  Channel. 
  

  

  9. 
  Echinus 
  angulosus. 
  

  

  A. 
  Agassiz, 
  Rev. 
  Ech. 
  p. 
  489. 
  

  

  With 
  a 
  little 
  hesitation 
  I 
  refer 
  to 
  this 
  species 
  three 
  specimens 
  from 
  

   Thursday 
  Island, 
  and 
  one 
  from 
  Prince 
  of 
  Wales 
  Channel. 
  The 
  

   species 
  is 
  a 
  wide-ranging 
  one, 
  and 
  apparently 
  presents 
  a 
  good 
  deal 
  

   of 
  variation. 
  

  

  10. 
  Echinus 
  darnleyensis. 
  

  

  J. 
  E. 
  Tenison-WvodsjProc. 
  Linn. 
  Soc. 
  N'. 
  S. 
  W. 
  ii. 
  p. 
  165. 
  

  

  In 
  accepting 
  this 
  species, 
  I 
  should 
  like 
  to 
  do 
  so 
  only 
  provisionally, 
  

   as 
  a 
  systematic 
  revision 
  of 
  the 
  exceedingly 
  troublesome 
  genus 
  to 
  

   which 
  it 
  belongs 
  may 
  show 
  it 
  to 
  be 
  only 
  part 
  of 
  one 
  of 
  the 
  very 
  

   variable 
  species 
  which 
  are 
  associated 
  under 
  the 
  emended 
  genus 
  

   Echinus. 
  

  

  Thursday 
  Island 
  (4 
  fms.) 
  and 
  Prince 
  of 
  Wales 
  Channel. 
  

  

  11. 
  Tripneustes 
  angulosus. 
  

  

  Hippouoe 
  variegata, 
  A. 
  Ayassiz, 
  Rev. 
  Ech. 
  p. 
  501. 
  

   Tripneustes 
  angulosus, 
  BeU, 
  P. 
  Z. 
  S. 
  1879, 
  p. 
  657. 
  

  

  The 
  coloration 
  of 
  this 
  specimen 
  is 
  more 
  marked 
  than 
  any 
  I 
  have 
  

   yet 
  had 
  the 
  opportunity 
  of 
  examining 
  ; 
  the 
  short 
  white 
  sjjines 
  are 
  

   found 
  either 
  on 
  white 
  areas, 
  the 
  middle 
  of 
  which 
  is 
  occupied 
  by 
  a 
  

   black 
  patch, 
  or 
  on 
  broad 
  black 
  bands, 
  rather 
  more 
  than 
  half 
  as 
  wide 
  

   as 
  the 
  white 
  areas 
  at 
  the 
  ambitus. 
  

  

  The 
  single 
  small 
  specimen 
  collected 
  was 
  found 
  at 
  Levuka, 
  Fiji. 
  

  

  12. 
  Strongylccentrotus 
  erythrogrammus, 
  Vol. 
  

   Strongylocentrotus 
  eui-ythrogrammus, 
  A. 
  Agassiz, 
  Rev. 
  Ech. 
  p. 
  441. 
  

  

  It 
  may 
  perhaps 
  be 
  pointed 
  out 
  that 
  the 
  spelling 
  of 
  the 
  specific 
  

   name 
  as 
  here 
  adopted 
  is 
  not 
  only 
  that 
  which 
  is 
  etymologically 
  

   correct, 
  but 
  is 
  the 
  very 
  same 
  as 
  that 
  which 
  was 
  proposed 
  by 
  Valen- 
  

   ciennes 
  (' 
  Voy. 
  Venus,' 
  Zoophyt. 
  pi. 
  vii. 
  fig, 
  1), 
  and 
  adopted 
  by 
  

   Liitken 
  and 
  Verrill 
  : 
  it 
  is 
  true 
  that 
  in 
  the 
  ' 
  Catal. 
  Eaisonne 
  ' 
  of 
  L. 
  

   Agassiz 
  and 
  Desor 
  (1846) 
  we 
  find 
  the 
  spelling 
  euryihroyrammus. 
  

  

  