﻿the 
  Species 
  o/Limnoria. 
  381 
  

  

  To 
  ascertain 
  if 
  tlie 
  Limnoria 
  occurred 
  elsewliere 
  in 
  New 
  

   Zealand, 
  1 
  applied 
  to 
  Mr. 
  Cyrus 
  Williams, 
  Engineer 
  to 
  the 
  

   Lyttelton 
  Harbour 
  Board, 
  who 
  most 
  obligingly 
  sent 
  me 
  a 
  

   specimen 
  of 
  an 
  ironbaik 
  pile, 
  the 
  outer 
  part 
  of 
  which 
  was 
  

   partially 
  destroyed. 
  Examination 
  showed 
  that 
  this 
  destruc- 
  

   tion 
  also 
  had 
  been 
  caused 
  by 
  Limnoria 
  Ugnorum, 
  though 
  in 
  

   this 
  particular 
  case 
  it 
  appeared 
  to 
  be 
  unaccompanied 
  by 
  

   Chelura 
  terebrans. 
  Mr. 
  Williams 
  stated 
  that 
  in 
  Lyttelton 
  

   Harbour 
  the 
  animal 
  could 
  perhaps 
  hardly 
  be 
  called 
  a 
  borer, 
  

   as 
  it 
  seemed 
  to 
  operate 
  only 
  on 
  the 
  surface, 
  removing 
  about 
  

   one 
  inch 
  from 
  the 
  outside 
  of 
  an 
  ironbark 
  pile 
  in 
  about 
  thirty 
  

   years, 
  though 
  with 
  softer 
  timber 
  its 
  operations 
  were 
  much 
  

   more 
  rapid. 
  Later 
  on, 
  in 
  December 
  1913, 
  I 
  found 
  tiie 
  same 
  

   species, 
  Limnoria 
  lignorum, 
  boring 
  into 
  piles 
  in 
  Akaroa 
  

   Harbour, 
  though 
  here 
  again 
  it 
  did 
  not 
  appear 
  to 
  be 
  accom- 
  

   panied 
  by 
  the 
  Chelura. 
  

  

  Probably 
  it 
  will 
  be 
  found 
  that 
  Limnoria 
  Ugnorum 
  has 
  been 
  

   similarly 
  introduced 
  into 
  many 
  other 
  harbours. 
  In 
  a 
  paper 
  

   on 
  the 
  marine 
  wood-borers 
  of 
  Australia, 
  read 
  at 
  the 
  Melbourne 
  

   Meeting 
  of 
  the 
  Australasian 
  Association 
  for 
  the 
  Advance- 
  

   ment 
  of 
  Science, 
  in 
  January 
  1900, 
  Mr. 
  Chas. 
  Hedley 
  (1901, 
  

   p. 
  237) 
  stated 
  that 
  neither 
  Limnoria 
  lignorum 
  nor 
  Chelura 
  

   terebrans 
  had 
  up 
  to 
  that 
  time 
  been 
  recorded 
  by 
  naturalists 
  

   from 
  A.ustralasiun 
  seas, 
  but 
  in 
  a 
  footnote, 
  added 
  on 
  the 
  llth 
  

   June, 
  1901, 
  as 
  his 
  paper 
  was 
  passing 
  through 
  the 
  press, 
  he 
  

   states 
  that 
  Mr. 
  T. 
  Wiiitelegge 
  had 
  identified 
  L, 
  lignorum 
  

   from 
  timber 
  from 
  a 
  floating 
  jetty 
  at 
  Circular 
  Quay, 
  and 
  

   again 
  from 
  part 
  of 
  the 
  hull 
  of 
  a 
  ferry-boat 
  plying 
  in 
  Sydney 
  

   Harbour. 
  

  

  In 
  the 
  timber, 
  both 
  from 
  Auckland 
  and 
  from 
  Lyttelton, 
  I 
  

   found, 
  along 
  with 
  the 
  Limnoria^ 
  numerous 
  specimens 
  of 
  

   another 
  Anijjhipod, 
  '* 
  Coro2)hium 
  contractum,^* 
  G. 
  M. 
  Thom- 
  

   son 
  (1881, 
  p. 
  220). 
  The 
  Gorophium, 
  however, 
  did 
  not 
  

   ap])ear 
  to 
  be 
  boring 
  into 
  the 
  timber, 
  but 
  to 
  be 
  merely 
  taking 
  

   advantage 
  of 
  the 
  decay 
  caused 
  by 
  the 
  Limnoria, 
  and 
  thereby 
  

   securing 
  a 
  suitable 
  dwelling-place 
  and 
  probably 
  also 
  food. 
  

   Dr. 
  Macdonald 
  has 
  (1875, 
  p. 
  67) 
  described 
  a 
  similar 
  associa- 
  

   tion 
  in 
  England, 
  where 
  Tanais 
  vittatus 
  was 
  found 
  in 
  the 
  holes 
  

   bored 
  by 
  Limnoria 
  lignorum 
  and 
  Chelura 
  terebrans. 
  

  

  In 
  this 
  paper 
  I 
  do 
  not 
  propose 
  to 
  deal 
  with 
  the 
  borer 
  from 
  

   the 
  economic 
  aspect; 
  some 
  details 
  of 
  the 
  damage 
  done 
  in 
  

   Australasia 
  by 
  these 
  Crustacea 
  and 
  by 
  other 
  borers 
  is 
  given 
  

   in 
  Mr. 
  Hedley's 
  paper. 
  The 
  examination 
  of 
  the 
  specimens, 
  

   however, 
  necessitated 
  a 
  comparison 
  with 
  L. 
  segnis, 
  a 
  species 
  

   which 
  does 
  not 
  bore 
  into 
  wood, 
  but 
  lives 
  on 
  seaweed, 
  parti- 
  

  

  