﻿IKEDALE 
  : 
  NOTES 
  ON 
  POLYPLACOPHOEA. 
  157 
  

  

  on 
  their 
  nature. 
  Since 
  I 
  drew 
  up 
  these 
  notes 
  I 
  have 
  read 
  Hedley's 
  

   paper 
  in 
  the 
  P.L.S. 
  N.S.W"., 
  vol. 
  xxviii, 
  1903, 
  on 
  the 
  effect 
  of 
  the 
  

   Bassian 
  Isthmus 
  on 
  the 
  Marine 
  Fauna 
  of 
  Australia. 
  As 
  mj 
  studies 
  in 
  

   Chitons 
  completely 
  confirm 
  his 
  conclusions, 
  I 
  am 
  herewith 
  amplifying 
  

   my 
  previous 
  report 
  by 
  incorporating 
  a 
  short 
  account 
  of 
  the 
  Australian 
  

   Chiton 
  fauna 
  in 
  the 
  terms 
  introduced 
  by 
  Hedley 
  in 
  that 
  paper. 
  

   Consequently 
  this 
  note 
  has 
  developed 
  into 
  a 
  review 
  of 
  that 
  class 
  of-< 
  ' 
  

   the 
  marine 
  MoUusca 
  of 
  Southern 
  and 
  Eastern 
  Aust;gj^lia, 
  practically 
  

   forming 
  an 
  Appendix 
  to 
  Hedley's 
  essay. 
  In 
  the 
  place 
  quoted 
  Hedley 
  

   introduced 
  some 
  new 
  names 
  for 
  the 
  divisions 
  he 
  proposed 
  as 
  follows 
  : 
  

   the 
  extent 
  of 
  Southern 
  Australia 
  from 
  Melbourne 
  to 
  Westralia 
  he 
  

   calls 
  the 
  Adelaidean 
  Region 
  ; 
  the 
  east 
  coast 
  of 
  Tasmania, 
  Gippsland, 
  

   and 
  IS'ew 
  South 
  Wales 
  constitute 
  the 
  Peronian 
  Region 
  ; 
  the 
  Queensland 
  

   coast 
  from 
  Moreton 
  Bay 
  to 
  Torres 
  Straits 
  he 
  terms 
  the 
  Solanderian 
  

   Regioyi 
  ; 
  whilst 
  from 
  Torres 
  Straits 
  to 
  Houtman's 
  Abrolhos 
  is 
  named 
  

   the 
  Bamperian 
  Region. 
  It 
  must 
  be 
  remembered 
  that 
  these 
  terms 
  

   apply 
  to 
  the 
  marine 
  fauna 
  only, 
  and 
  that 
  the 
  Solanderian 
  and 
  

   Damperian 
  are 
  only 
  subdivisions 
  of 
  the 
  Indo-Pacific 
  fauna, 
  and 
  that 
  

   the 
  Peronian 
  and 
  Adelaidean 
  Regions 
  are 
  only 
  subdivisions 
  of 
  the 
  

   Euronotian 
  or 
  Bassian 
  fauna. 
  Hedley 
  notes 
  that 
  considerable 
  inter- 
  

   change 
  has 
  taken 
  and 
  is 
  yet 
  taking 
  place 
  between 
  the 
  Peronian 
  and 
  

   Adelaidean 
  Regions. 
  

  

  To 
  return 
  to 
  the 
  Queensland 
  Polyplacophora 
  : 
  the 
  list 
  made 
  up 
  by 
  

   Hedley 
  consists 
  almost 
  entirely 
  of 
  Torres 
  Straits, 
  Port 
  MoUe, 
  and 
  Poit 
  

   Curtis 
  records. 
  It 
  is 
  at 
  once 
  recognized 
  as 
  typically 
  Solanderian, 
  no 
  

   fewer 
  than 
  twelve 
  of 
  the 
  eighteen 
  species 
  being 
  confined, 
  as 
  far 
  as 
  the 
  

   east 
  coast 
  of 
  Australia 
  is 
  concerned, 
  to 
  Queensland, 
  north 
  of 
  Moreton 
  

   Bay. 
  I 
  collected 
  at 
  Caloundra, 
  just 
  north 
  of 
  Brisbane, 
  and 
  there 
  

   procured 
  some 
  fifteen 
  species 
  and 
  one 
  variety, 
  all 
  of 
  which, 
  with 
  one 
  

   exception, 
  have 
  been 
  obtained 
  at 
  Port 
  Jackson, 
  JS'ew 
  South 
  Wales, 
  

   and 
  no 
  fewer 
  than 
  ten 
  species 
  are 
  additions 
  to 
  Hedley's 
  list. 
  At 
  Port 
  

   Curtis, 
  about 
  300 
  miles 
  to 
  the 
  north, 
  this 
  fauna 
  is 
  non-existent. 
  As 
  

   I 
  will 
  shortly 
  show, 
  Australian 
  Chitons 
  have 
  very 
  limited 
  range, 
  and 
  

   the 
  fact 
  that 
  the 
  Peronian 
  Chitons 
  die 
  out 
  between 
  Caloundra 
  and 
  

   Port 
  Curtis 
  shows 
  Hedley's 
  limits 
  for 
  his 
  regions 
  to 
  be 
  maintained 
  by 
  

   the 
  study 
  of 
  this 
  class. 
  The 
  species 
  I 
  collected 
  at 
  Caloundra 
  were 
  — 
  

  

  *Plaxi2Jhora 
  eostata,'S[3.\'a.\. 
  * 
  Callochiton 
  platessa, 
  Gould. 
  

   *AcaHthochites 
  costatus, 
  Ad. 
  & 
  Ang. 
  Onithochiton 
  quercinus, 
  Gould. 
  

  

  *A. 
  variabilis, 
  Ad. 
  & 
  Aug. 
  Liolophura 
  Gaimardi, 
  Blainv. 
  

  

  *A. 
  retrojectus, 
  Pils. 
  Ischiiochiton 
  australis, 
  Sowb. 
  

  

  Callistochitrm 
  antxquus, 
  Eeeve. 
  *J. 
  crispus, 
  Eeeve. 
  

  

  *Chiton 
  limans, 
  Sykes. 
  *J. 
  divergens, 
  Eeeve. 
  

  

  *C. 
  n.sp. 
  , 
  near 
  Coxi, 
  Pils. 
  *I. 
  smaragdinus, 
  Angas. 
  

  

  C. 
  translucens, 
  Hedley 
  & 
  Hull. 
  */. 
  smaragdinus. 
  piduratas, 
  Pils. 
  

  

  Those 
  not 
  included 
  in 
  Hedley's 
  list 
  are 
  marked 
  with 
  an 
  *. 
  

  

  I 
  have 
  collated 
  a 
  total 
  of 
  ninety-five 
  Chitons 
  for 
  Australia, 
  of 
  which, 
  

   politically, 
  twentj^-eight 
  belong 
  to 
  Queensland, 
  thirty-one 
  to 
  jS^ew 
  

   South 
  Wales, 
  thirty-seven 
  to 
  Victoria, 
  fifty-two 
  to 
  South 
  Australia, 
  

   and 
  twenty-five 
  to 
  Tasmania. 
  I 
  have 
  only 
  one 
  record 
  from 
  West 
  

   Australia, 
  though 
  I 
  have 
  seen 
  three 
  species 
  purporting 
  to 
  come 
  from 
  

  

  