﻿IREDALE 
  & 
  may: 
  MISjSTAMED 
  TASMANIAN 
  CniTONS. 
  107 
  

  

  speciosHS, 
  Ad. 
  «& 
  Ang., 
  are 
  synonyms, 
  and 
  (2) 
  contractus, 
  lleeve, 
  of 
  

   wliich 
  Mr. 
  Sykes 
  considers 
  pallidus, 
  Reeve, 
  a 
  synonym." 
  This 
  

   conclusion 
  was 
  accepted 
  by 
  Eednall, 
  though 
  he 
  observed 
  he 
  was 
  not 
  

   satisfied. 
  Confusion 
  of 
  more 
  than 
  one 
  species 
  under 
  the 
  name 
  

   contractus 
  in 
  Tasmania 
  urged 
  reconsideration 
  from 
  first 
  principles, 
  

   wlien 
  it 
  was 
  found 
  that 
  the 
  description 
  of 
  contractus 
  was 
  only 
  

   applicable 
  to 
  the 
  shell 
  known 
  as 
  decussatas, 
  specimens 
  being 
  available 
  

   that 
  agreed 
  absolutely 
  with 
  lleeve's 
  figure 
  and 
  description. 
  Reeve 
  

   Avrote, 
  ^'■terminal 
  valves 
  and 
  lateral 
  areas 
  of 
  the 
  rest 
  concentrically 
  " 
  

   granulated, 
  granules 
  solitary." 
  This 
  is 
  quite 
  definite 
  and 
  sufficient 
  

   to 
  fix 
  the 
  species, 
  and 
  when 
  this 
  is 
  accepted 
  the 
  exact 
  shape 
  and 
  

   coloration 
  are 
  seen 
  to 
  agree. 
  Search 
  in 
  the 
  British 
  Museum 
  showed 
  

   that 
  the 
  description 
  and 
  figure 
  had 
  been 
  taken 
  from 
  a 
  specimen 
  of 
  

   decussatus 
  on 
  tlie 
  same 
  tablet 
  as 
  specimens 
  of 
  '■'contractus 
  auctt.", 
  

   and 
  this 
  had 
  apparently 
  been 
  selected 
  as 
  being 
  the 
  most 
  perfect. 
  

   Consequently 
  the 
  name 
  contractus 
  undoubtedly 
  refers 
  to 
  the 
  species 
  

   known 
  as 
  decussatus, 
  and 
  the 
  synonymy 
  given 
  in 
  the 
  Man. 
  Conch 
  by 
  

   Pilsbry 
  is 
  exact. 
  We 
  had 
  drawn 
  up 
  a 
  description 
  of 
  '^contractus 
  

   auctt. 
  " 
  when 
  we 
  recognized 
  that 
  the 
  description 
  of 
  lineolaius 
  given 
  

   by 
  Blainville 
  was 
  absolutely 
  applicable. 
  We 
  reproduce 
  the 
  latter 
  : 
  

   '' 
  C\^hiton'] 
  lineolatus 
  (l{lainville),I)ict. 
  Sci. 
  jS"at. 
  (Levrault), 
  vol.xxxvi, 
  

   1825, 
  p. 
  541). 
  Coll. 
  du 
  Mus. 
  

  

  "Corps 
  ovale, 
  assez 
  alonge; 
  les 
  aires 
  laterales 
  des 
  valves 
  inter- 
  

   mediaires 
  moins 
  distinctes 
  que 
  dans 
  les 
  especes 
  precedentes, 
  et 
  offiant 
  

   des 
  stries 
  nombreuses 
  sur 
  les 
  bords 
  ; 
  les 
  ecailles 
  du 
  limbe 
  tres-petites; 
  

   les 
  dents 
  des 
  lames 
  d'insertion 
  non 
  pectinees 
  ; 
  couleur 
  variee 
  de 
  

   petites 
  taches 
  longitudinales 
  brunes 
  sur 
  un 
  fond 
  jaunatre. 
  Cette 
  

   espece, 
  assez 
  rapprochee 
  de 
  Toscabrion 
  alonge, 
  a 
  ete 
  rapportee 
  de 
  Tile 
  

   King 
  par 
  M. 
  Peron 
  et 
  Lesueur." 
  

  

  Sykes 
  has 
  recorded 
  C. 
  pallidus, 
  Reeve, 
  as 
  a 
  synonym, 
  but 
  the 
  

   description 
  is 
  of 
  a 
  smooth 
  shell 
  of 
  unknown 
  locality. 
  The 
  tablet 
  

   bearing 
  the 
  name 
  lias 
  specimens 
  of 
  '^contractus" 
  upon 
  it, 
  as 
  Sykes 
  

   recognized, 
  but 
  the 
  particular 
  shell 
  figured 
  and 
  desci'ibed 
  by 
  Reeve 
  

   is 
  there 
  also; 
  it 
  is 
  a 
  smooth 
  shell, 
  due 
  to 
  extraordinary 
  tvear, 
  and 
  difi'ers 
  

   in 
  shape 
  and 
  is 
  quite 
  indeterminable, 
  but 
  textilis 
  is 
  suggested, 
  and 
  it 
  

   verA' 
  probably 
  is 
  not 
  Australian. 
  We 
  give 
  the 
  synonymy 
  of 
  the 
  two 
  

   species 
  as 
  Ave 
  now 
  make 
  it. 
  

  

  Isclmochiton 
  contractus 
  (Reeve). 
  

  

  Chiton 
  contractus, 
  Reeve, 
  1847 
  = 
  C. 
  sulcatns, 
  Q,uoy 
  & 
  Gaimard, 
  

   1834, 
  not 
  of 
  AVood, 
  1815 
  = 
  C. 
  decussatus, 
  Reeve, 
  1847 
  = 
  C. 
  castas. 
  

   Reeve, 
  1847 
  = 
  Lepidopleurus 
  speciosus, 
  H. 
  Adams 
  & 
  Angas, 
  1864 
  = 
  

   Gipnnujjlax 
  urvillei, 
  Rochebrune, 
  1881. 
  

  

  Rtange 
  : 
  Adelaidean 
  Region 
  from 
  Flinders 
  Island, 
  Bass' 
  Straits, 
  to 
  

   Rottnest 
  Island, 
  West 
  Australia 
  (AV. 
  Torr). 
  

  

  Note. 
  — 
  One 
  of 
  us 
  observed 
  that 
  specimens 
  in 
  the 
  British 
  Museum 
  

   from 
  AVest 
  Australia 
  appeared 
  separable. 
  We 
  have 
  not 
  seen 
  any 
  

   more 
  shells 
  from 
  that 
  locality, 
  but 
  Torr 
  has 
  again 
  recorded 
  it. 
  We 
  

   here 
  note 
  that 
  should 
  the 
  West 
  Australian 
  form 
  be 
  distinguished 
  it 
  

  

  