﻿160 
  COLLECTIONS 
  FROM 
  MELANESIA, 
  

  

  Disk 
  small. 
  Arms 
  about 
  70 
  millim, 
  long, 
  cirri 
  about 
  16 
  millim. 
  

  

  Colour 
  white 
  ; 
  pinnules 
  sometimes 
  banded 
  with 
  darker. 
  

  

  This 
  species 
  presents 
  some 
  resemblances 
  to 
  A. 
  pinniformis 
  of 
  

   Carpenter. 
  

  

  Arafura 
  Sea 
  (32-36 
  fms.) 
  ; 
  Dundas 
  Strait 
  ; 
  Prince 
  of 
  Wales 
  

   Channel. 
  

  

  I 
  provisionally 
  associate 
  with 
  this, 
  as 
  a 
  variety, 
  two 
  specimens 
  

   from 
  St. 
  144, 
  in 
  which 
  the 
  cirri 
  are 
  rather 
  more 
  numerous 
  and 
  more 
  

   jointed, 
  in 
  which 
  the 
  whole 
  animal 
  appears 
  to 
  be 
  more 
  slender 
  and 
  

   delicate, 
  and 
  the 
  colour 
  ashy 
  grey. 
  

  

  9. 
  Antedon 
  reginas. 
  (Plate 
  XII. 
  fig. 
  A, 
  a.) 
  

  

  Centrodorsal 
  hidden 
  by 
  the 
  cirri 
  ; 
  cirri 
  about 
  30, 
  with 
  30 
  stout 
  

   and 
  laterally 
  compressed 
  joints, 
  about 
  20 
  of 
  which 
  are 
  provided 
  with 
  

   a 
  well-marked 
  spine. 
  

  

  First 
  radials 
  not 
  visible, 
  second 
  broader 
  than 
  long, 
  in 
  contact 
  ; 
  

   third 
  short, 
  with 
  a 
  very 
  slight 
  backward 
  projection 
  in 
  the 
  middle 
  

   line. 
  Two 
  broad 
  distichals. 
  Thirt}--five 
  arms 
  ; 
  if 
  the 
  arms 
  divide 
  

   a 
  second 
  time 
  there 
  are 
  two 
  palmars, 
  and 
  the 
  third 
  brachial 
  is 
  a 
  

   syzygy 
  ; 
  if 
  the 
  arm 
  does 
  not 
  divide 
  a 
  second 
  time, 
  the 
  fifth 
  brachial 
  

   is 
  a 
  syzygy. 
  At 
  first 
  the 
  joints 
  are 
  fairly 
  regular, 
  though 
  much 
  

   shorter 
  than 
  wide 
  ; 
  later 
  on 
  they 
  become 
  more 
  or 
  less, 
  though 
  never 
  

   very 
  strikingly, 
  wedge-shaped. 
  

  

  Syzygies 
  on 
  the 
  ninth 
  joint 
  ; 
  then 
  from 
  9-14 
  between 
  each. 
  

  

  The 
  first 
  pinnule 
  is 
  shorter 
  than 
  the 
  second, 
  which 
  is 
  of 
  some 
  

   length, 
  and 
  the 
  third 
  than 
  the 
  fourth 
  ; 
  most 
  of 
  the 
  pinnules 
  are 
  

   very 
  short. 
  

  

  Length 
  of 
  arms 
  about 
  70 
  millim., 
  cirri 
  about 
  24 
  millim. 
  Disk 
  

   deeply 
  incised, 
  10 
  millim. 
  in 
  diameter. 
  

  

  Colour, 
  flesh-coloured. 
  

  

  Port 
  Molle. 
  

  

  10. 
  Antedon 
  articulata. 
  

   Coniatula 
  (Alecto) 
  articulata, 
  Mull. 
  Gat. 
  Camnt. 
  p, 
  27. 
  

   Port 
  Molle. 
  

  

  11. 
  Antedon 
  gyges. 
  (Plate 
  XII. 
  figs. 
  B, 
  a, 
  h.) 
  

  

  Centrodorsal 
  flattened, 
  rounded, 
  with 
  cirri 
  in 
  three 
  rows, 
  rather 
  

   more 
  than 
  40, 
  with 
  rather 
  more 
  than 
  30 
  joints, 
  the 
  fifth 
  to 
  the 
  tenth 
  

   longer 
  than 
  broad, 
  the 
  sixcceeding 
  joints 
  shorter, 
  and 
  provided, 
  first 
  

   of 
  all, 
  with 
  a 
  convex 
  dorsal 
  edge 
  ; 
  this 
  narrows 
  into 
  a 
  wide 
  spinous 
  

   protuberance, 
  which 
  becomes 
  more 
  and 
  more 
  spiny 
  till 
  the 
  fairly 
  

   well-marked 
  penultimate 
  si)ine 
  is 
  reached. 
  

  

  The 
  single 
  specimen 
  has 
  41 
  arms. 
  

  

  First 
  radials 
  completely, 
  second 
  largely 
  obscured 
  ;' 
  the 
  third 
  tri- 
  

   angular, 
  not 
  a 
  syzygy 
  ; 
  a 
  slight 
  median 
  conical 
  protuberance 
  in 
  the 
  

  

  