﻿152 
  COLLECTIONS 
  FROM 
  MELANESIA. 
  

  

  16. 
  Holothuria 
  lineata. 
  

  

  Ludwif/, 
  Semper^s 
  Arbetten, 
  ii. 
  p. 
  103. 
  

   One 
  specimen 
  from 
  Thursday 
  Island 
  ; 
  skin 
  very 
  thick. 
  

  

  17. 
  Holothuria 
  peregrina. 
  

  

  Ludwig, 
  Semper 
  s 
  Arbeifen, 
  ii. 
  p. 
  105. 
  

  

  "With 
  considerable 
  doubt 
  I 
  refer 
  to 
  this 
  species 
  a 
  single 
  specimen 
  

   from 
  Thursday 
  Island. 
  

  

  18. 
  Holothuria 
  modesta(?), 
  

  

  Holothuria 
  modesta, 
  Se77iper's 
  Arbeiten, 
  ii. 
  p. 
  106. 
  

  

  Professor 
  Ludwig 
  described 
  his 
  species 
  from 
  a 
  single 
  specimen, 
  

   and, 
  curiously 
  enough, 
  there 
  is 
  only 
  one 
  specimen 
  in 
  the 
  ' 
  Alert 
  ' 
  

   collection. 
  The 
  characters 
  of 
  the 
  supporting 
  rods 
  in 
  the 
  suckers 
  

   leads 
  me 
  to 
  believe 
  that 
  the 
  two 
  are 
  forms 
  of 
  the 
  same 
  species 
  ; 
  but 
  

   a 
  full 
  examination 
  is 
  not 
  possible 
  with 
  a 
  single 
  representative. 
  

  

  Torres 
  Straits. 
  

  

  19. 
  Holothuria 
  macleari. 
  (Plate 
  IX. 
  fig. 
  G.) 
  

  

  As 
  will 
  be 
  seen 
  by 
  the 
  figures, 
  the 
  spicules 
  of 
  this 
  species 
  present 
  

   a 
  considerable 
  resemblance 
  to 
  those 
  of 
  H. 
  tigris, 
  with 
  which, 
  as 
  it 
  

   would 
  seem, 
  it 
  must 
  be 
  closely 
  allied. 
  

  

  As 
  there 
  is 
  but 
  a 
  single 
  specimen, 
  presenting 
  well-marked 
  external 
  

   characters, 
  I 
  think 
  it 
  right 
  to 
  limit 
  myself 
  to 
  an 
  account 
  of 
  these. 
  

   Body 
  elongated, 
  trivium 
  flat, 
  bivium 
  convex, 
  anus 
  round, 
  unarmed, 
  

   without 
  (perhaps 
  having 
  lost) 
  any 
  distinct 
  indications 
  of 
  pentame- 
  

   rous 
  marking 
  ; 
  ambulacral 
  papillae 
  on 
  the 
  convex 
  back, 
  three 
  rows 
  

   of 
  not 
  very 
  regularly 
  arranged 
  suckers 
  on 
  the 
  trivium. 
  An 
  appear- 
  

   ance 
  of 
  ringing 
  both 
  above 
  and 
  below 
  is 
  produced 
  by 
  the 
  white 
  

   colours 
  and 
  transverse 
  setting 
  of 
  the 
  papillae 
  and 
  suckers 
  respec- 
  

   tively 
  ; 
  as 
  the 
  former 
  are 
  less 
  numerous 
  than 
  the 
  latter, 
  there 
  are 
  

   only 
  about 
  thirty 
  bivial 
  rings, 
  while 
  on 
  the 
  trivium 
  two 
  or 
  three 
  

   rings 
  are 
  here 
  and 
  there 
  confluent 
  and 
  present 
  a 
  kind 
  of 
  longitudinal 
  

   marking. 
  

  

  The 
  single 
  specimen 
  is 
  49 
  millim. 
  long 
  and 
  10 
  millim. 
  wide. 
  

  

  " 
  Clairmont 
  and 
  Bird 
  Islands," 
  N.E. 
  Australia. 
  

  

  A 
  specimen 
  from 
  the 
  island 
  of 
  Rodriguez, 
  in 
  the 
  possession 
  of 
  the 
  

   British 
  Museum, 
  apparently 
  belongs 
  to 
  this 
  species. 
  

  

  