﻿140 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  11. 
  Ophiocoma 
  scolopendrina. 
  

  

  Lyman, 
  p. 
  26. 
  

   Port 
  MoUe. 
  

  

  12. 
  Ophiartlirum 
  elegans. 
  

  

  Peters, 
  Wiegmanri's 
  Arch. 
  1852, 
  p. 
  82. 
  

  

  Though 
  the 
  British 
  Museum 
  possesses 
  several 
  specimens 
  of 
  this 
  

   species, 
  the 
  present 
  is 
  especially 
  useful, 
  as 
  it 
  is 
  the 
  first 
  which 
  has 
  

   come 
  to 
  hand 
  in 
  which 
  even 
  one 
  of 
  the 
  " 
  sehr 
  zerbreehlich 
  " 
  arms 
  

   has 
  been 
  preserved 
  entire. 
  As 
  the 
  disk 
  measures 
  18 
  millim., 
  and 
  

   this 
  complete 
  arm 
  rather 
  more 
  than 
  120 
  millim., 
  we 
  find 
  that 
  the 
  

   object 
  now 
  in 
  hand 
  presents 
  very 
  much 
  the 
  same 
  proportions 
  as 
  the 
  

   specimen 
  described 
  by 
  Dr. 
  Peters. 
  In 
  an 
  example 
  from 
  Torres 
  

   Straits, 
  which 
  has 
  been 
  some 
  years 
  in 
  the 
  possession 
  of 
  the 
  Trustees, 
  

   there 
  is 
  an 
  arm 
  which 
  is 
  in 
  a 
  sense 
  complete, 
  but 
  it 
  was 
  obviously 
  

   broken 
  during 
  life 
  ; 
  and 
  though 
  the 
  disk 
  is 
  of 
  very 
  much 
  the 
  same 
  dia- 
  

   meter 
  as 
  that 
  just 
  added 
  to 
  the 
  collection, 
  this 
  arm 
  only 
  measures 
  

   60 
  millim. 
  

  

  Dr. 
  Coppinger's 
  specimen 
  was 
  collected 
  at 
  Levuka, 
  Fiji. 
  

  

  OPHIOTHRIX. 
  

  

  In 
  addition 
  to 
  the 
  series 
  hereafter 
  mentioned 
  and 
  described,-there 
  

   were 
  indications 
  cf 
  other 
  species, 
  not 
  sufficiently 
  good 
  to 
  justify 
  de- 
  

   scription, 
  but 
  quite 
  well 
  enough 
  marked 
  to 
  point 
  to 
  the 
  great 
  wealth 
  

   of 
  Ojjhiothrvv-iorms 
  in 
  the 
  seas 
  where 
  these 
  dredgings 
  were 
  made. 
  

  

  13. 
  OpMothrix 
  fumaria. 
  

   Lyman, 
  p. 
  34. 
  

  

  As 
  this 
  is 
  a 
  very 
  rare 
  species, 
  the 
  following 
  notes 
  may 
  be 
  of 
  

   interest 
  : 
  — 
  

  

  Eadial 
  shields 
  naked, 
  large, 
  with 
  a 
  curve 
  along 
  their 
  basal 
  edge, 
  

   each 
  separated 
  from 
  its 
  fellow 
  by 
  a 
  low 
  ridge 
  on 
  which 
  granules 
  are 
  

   generally 
  developed. 
  Each 
  pair 
  of 
  radial 
  shields 
  is 
  separated 
  by 
  some 
  

   seven 
  rows 
  of 
  prominent 
  granules 
  : 
  these 
  granules 
  occupy 
  all 
  but 
  the 
  

   very 
  central 
  portion 
  of 
  the 
  disk, 
  and 
  form 
  a 
  spinous 
  patch 
  on 
  the 
  

   lower 
  surface. 
  Mouth-shields 
  irregularly 
  oval, 
  pretty 
  sharply 
  angu- 
  

   lated 
  proximally 
  and 
  very 
  narrow 
  dis 
  tally, 
  so 
  that 
  the 
  bridge 
  be- 
  

   tween 
  the 
  genital 
  slits 
  is 
  very 
  narrow. 
  Only 
  the 
  median 
  portion 
  of 
  

   the 
  interbrachial 
  space 
  is 
  spinous. 
  

  

  Upper 
  arm-plates 
  a 
  good 
  deal 
  encroached 
  upon 
  by 
  the 
  side 
  arm- 
  

   plates, 
  so 
  that, 
  for 
  the 
  greater 
  part 
  of 
  the 
  arm, 
  they 
  are 
  wider 
  along 
  

   their 
  distal 
  than 
  their 
  proximal 
  edge 
  ; 
  spine-ridge 
  of 
  side 
  arm-plates 
  

   not 
  specially 
  well 
  developed 
  ; 
  lower 
  arm-plates 
  rectangular, 
  a 
  little 
  

  

  