﻿A:\rPTTINEURA 
  

  

  285 
  

  

  T. 
  gothicus 
  Carpenter 
  was 
  at 
  the 
  time 
  a 
  manuscript 
  name 
  and, 
  therefore, 
  not 
  eligible 
  to 
  be 
  

   type 
  species 
  of 
  the 
  genus. 
  /. 
  psetidodentiens 
  Carpenter 
  was 
  a 
  name 
  given 
  by 
  Carpenter 
  for 
  

   Chiton 
  dentiens 
  Gould 
  (1846). 
  Hence 
  Chiton 
  dentiens 
  Gould 
  is 
  the 
  monotype 
  of 
  Trachyder- 
  

   mon. 
  Chiton 
  dentiens 
  Gould 
  is 
  a 
  Cyanoplax 
  Pilsbry, 
  1892 
  {fide 
  Berry, 
  1948b, 
  p. 
  14), 
  which 
  

   makes 
  Trachydcnnon 
  Carpenter 
  have 
  precedent 
  over 
  the 
  later 
  generic 
  name. 
  

  

  In 
  Carpenter's 
  second 
  mention 
  of 
  Trachydermon 
  (1864b, 
  p. 
  649) 
  he 
  included 
  nine 
  species 
  

   in 
  the 
  genus. 
  It 
  is 
  this 
  second 
  reference 
  which 
  Pilsbry 
  (1892, 
  p. 
  67; 
  1893, 
  p. 
  62, 
  63) 
  considered 
  

   the 
  original 
  reference. 
  Pilsbry 
  designated 
  the 
  last 
  species 
  mentioned, 
  T. 
  flcctcns 
  Carpenter, 
  

   as 
  the 
  type 
  species 
  of 
  the 
  genus. 
  

  

  Dall 
  (1879, 
  p. 
  295) 
  used 
  Trachydermon 
  Carpenter 
  with 
  "T. 
  cinereiis 
  Lowe" 
  as 
  type 
  

   species. 
  That 
  designation 
  is 
  not 
  valid, 
  because 
  that 
  species 
  was 
  not 
  included 
  by 
  Carpenter 
  in 
  

   the 
  original 
  mention 
  of 
  the 
  genus. 
  

  

  Berry 
  (1918) 
  proposed 
  the 
  name 
  Basiliochiton 
  for 
  T. 
  flectcns 
  Carpenter, 
  because 
  he 
  had 
  

   been 
  told 
  that 
  Trachydermon 
  was 
  preoccupied. 
  However, 
  although 
  there 
  are 
  several 
  uses 
  of 
  

   Trachyderma 
  (Latreille, 
  1829; 
  Gravenhorst, 
  1829; 
  Wiegman, 
  1834) 
  the 
  appellation 
  of 
  Tra- 
  

   chydermon 
  has 
  not 
  been 
  used 
  other 
  than 
  that 
  of 
  Carpenter. 
  Basiliochiton 
  is 
  not 
  necessary 
  or 
  

   valid 
  unless 
  the 
  first 
  reference 
  of 
  Carpenter 
  is 
  accepted, 
  whereby 
  Trachydermon, 
  1864, 
  has 
  

   precedent 
  over 
  Cyanoplax 
  Pilsbry, 
  1892. 
  If 
  this 
  condition 
  is 
  not 
  accepted, 
  Trachydermon 
  is 
  a 
  

   bona 
  fide 
  generic 
  name, 
  and 
  T. 
  flectcns 
  Carpenter 
  is 
  the 
  type 
  species. 
  

  

  Prof. 
  Henry 
  Poirier 
  was 
  consulted 
  in 
  regard 
  to 
  the 
  equivalence 
  of 
  Trachyderma 
  and 
  

   Trachydermon 
  because 
  of 
  similar 
  classical 
  origin. 
  Professor 
  Poirier 
  kindly 
  sent 
  his 
  opinion 
  

   (Oct. 
  6, 
  1955, 
  personal 
  communication) 
  as 
  follows: 
  

  

  "They 
  {Trachyderma 
  and 
  Trachydermon) 
  differ 
  only 
  in 
  termination, 
  but 
  Trachydermon 
  

   introduced 
  in 
  1863 
  should 
  not 
  now 
  be 
  rejected 
  because 
  it 
  has 
  the 
  same 
  origin 
  and 
  meaning 
  

   as 
  Trachyderma." 
  

  

  "Basiliochiton" 
  flectcns 
  (Carpenter) 
  

  

  Ischnochiton 
  flectcns 
  Carpenter, 
  1864b, 
  p. 
  603, 
  606; 
  Reprint, 
  1872, 
  p. 
  89, 
  92; 
  Pilsbry, 
  1892, 
  

   Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  75 
  

  

  Trachxdermon 
  flectcns 
  Carpenter, 
  1864b, 
  p. 
  649; 
  Reprint, 
  1872, 
  p. 
  135; 
  Cooper, 
  1867, 
  Geog. 
  

   Cat. 
  Moll., 
  Geol. 
  Sur. 
  California, 
  p. 
  23; 
  1871. 
  Amer. 
  Jour. 
  Conch., 
  vol. 
  VI, 
  p. 
  59; 
  Pilsbry, 
  

   1893, 
  Man. 
  Conch., 
  vol. 
  XV, 
  p. 
  64, 
  pi. 
  15, 
  figs. 
  34-37: 
  Berry, 
  1917, 
  California 
  Acad. 
  Sci., 
  

   Proc, 
  vol. 
  VII, 
  no. 
  10, 
  p. 
  239, 
  245-248 
  

  

  Ishnochiton 
  (Trachydermon) 
  flectcns 
  Carpenter, 
  1865, 
  Acad. 
  Xat. 
  Sci. 
  Philadelphia, 
  Proc., 
  

   vol. 
  17, 
  p. 
  60 
  

  

  Lepidochito-na 
  flcctcns 
  (Carpenter), 
  Dall, 
  1918, 
  Nautilus, 
  vol. 
  32, 
  p. 
  3; 
  1921, 
  p. 
  189 
  section 
  

   Basiliochiton: 
  Oldroyd, 
  1924, 
  Pub. 
  Puget 
  Sound 
  Biol. 
  Station, 
  vol. 
  4, 
  p. 
  187; 
  1927, 
  vol. 
  II, 
  

   pt. 
  Ill, 
  p. 
  260 
  section 
  Lcpidochitona: 
  W'illett, 
  1935, 
  Nautilus, 
  vol. 
  49, 
  no. 
  2, 
  p. 
  42 
  includes 
  

   Dendrochiton 
  semiliratus 
  Berry, 
  1927, 
  as 
  synonymous 
  

  

  Basiliochiton 
  flectcns 
  (Carpenter), 
  Berry, 
  1918, 
  Nautilus, 
  vol. 
  Z2, 
  p. 
  12; 
  1925, 
  Acad. 
  Nat. 
  

   Sci. 
  Philadelphia, 
  Proc, 
  vol. 
  77, 
  p. 
  23, 
  24; 
  Burch, 
  1947, 
  no. 
  66, 
  p. 
  19; 
  Smith 
  and 
  Gor- 
  

   don, 
  1948, 
  California 
  Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XXVI, 
  p. 
  206 
  

  

  "Mantle-margin 
  scarcely 
  granular. 
  Rosy, 
  very 
  small, 
  scarcely 
  sculptured 
  : 
  valves 
  beaked 
  

   and 
  waved 
  as 
  in 
  M. 
  Simpsonii: 
  eaves 
  and 
  incisors 
  normal." 
  [Carpenter, 
  1864b, 
  p. 
  649] 
  

  

  Oldroyd 
  (1927) 
  republished 
  Carpenter's 
  Latin 
  description 
  (1866) 
  and 
  Pilsbry's 
  transla- 
  

   tion. 
  

  

  To 
  Oldroyd's 
  copy 
  of 
  Carpenter's 
  description 
  (1865e) 
  the 
  following 
  lines 
  should 
  be 
  added: 
  

  

  "Hah. 
  In 
  sinu 
  Pugetiano 
  legit 
  Kennerley 
  : 
  in 
  insula 
  Vancouver 
  legit 
  Lord 
  : 
  prope 
  Mon- 
  

   terey, 
  Taylor: 
  apud 
  San 
  Diegoncm, 
  Cooper." 
  [Carpenter, 
  1865e, 
  p. 
  60] 
  

  

  The 
  type 
  of 
  this 
  species 
  has 
  not 
  been 
  found. 
  The 
  statement 
  in 
  Oldroyd 
  (1927) 
  that 
  it 
  is 
  in 
  

   the 
  U. 
  S. 
  National 
  Museum 
  and 
  her 
  statement 
  regarding 
  type 
  locality 
  are 
  incorrect. 
  The 
  type 
  

   locality 
  could 
  be 
  one 
  of 
  three 
  locales 
  (see 
  description 
  above), 
  depending 
  on 
  where 
  a 
  syntype 
  

   may 
  be 
  found. 
  Berry's 
  (1925, 
  p. 
  24) 
  statement 
  that 
  Puget 
  Sound 
  is 
  the 
  type 
  locality 
  will 
  only 
  

   prove 
  to 
  be 
  true 
  if 
  a 
  type 
  is 
  eventually 
  found 
  or 
  selected 
  from 
  that 
  area. 
  

  

  There 
  are 
  two 
  lots 
  of 
  specimens 
  (not 
  types) 
  in 
  the 
  U. 
  S. 
  National 
  Museum 
  which 
  bear 
  

   the 
  name 
  "L. 
  flectcns 
  montereyensis 
  Cpr." 
  This 
  is 
  a 
  nomen 
  nudum. 
  Berry 
  (1917, 
  p. 
  247) 
  

  

  