﻿276 
  ATARTXE 
  ^roLT.rscA 
  drscrtred 
  by 
  p. 
  p. 
  carpenter 
  

  

  Pilsbry 
  (1892) 
  included 
  a 
  translation 
  of 
  Carpenter's 
  original 
  description 
  and 
  later 
  (1893) 
  

   presented 
  additional 
  notes 
  on 
  the 
  species. 
  Oldroyd 
  (1927) 
  published 
  a 
  copy 
  of 
  both 
  Carpen- 
  

   ter's 
  description 
  and 
  Pilsbry's 
  translation. 
  The 
  following 
  should 
  be 
  changed 
  in 
  the 
  copy 
  by 
  

   Oldroyd 
  to 
  make 
  that 
  copy 
  complete. 
  

  

  Read 
  .34 
  for 
  34 
  ; 
  .2 
  for 
  2 
  

  

  Add 
  : 
  

  

  ". 
  . 
  . 
  div. 
  115°. 
  

  

  "Differs 
  from 
  Elcncnsis 
  in 
  tlic 
  sculpture 
  of 
  tiie 
  terminal 
  valves." 
  [Carpenter, 
  1864, 
  p. 
  315] 
  

  

  The 
  type 
  of 
  this 
  species 
  was 
  in 
  tiie 
  U. 
  S. 
  National 
  Museum, 
  no. 
  16204, 
  but, 
  although 
  the 
  

   original 
  glass 
  mount 
  is 
  still 
  present, 
  the 
  specimen 
  is 
  gone 
  and 
  has 
  been 
  for 
  at 
  least 
  5 
  years, 
  

   according 
  to 
  a 
  note 
  with 
  the 
  type. 
  The 
  tablet 
  has 
  a 
  label 
  "type 
  C.S.L. 
  Xantus." 
  

  

  A 
  specimen 
  in 
  the 
  Redpath 
  Museum 
  is 
  labelled, 
  "Leptopleurus 
  serratus 
  Cpr. 
  var. 
  C 
  type 
  

   C. 
  San 
  Lucas 
  Xanthus 
  Pearl 
  Id." 
  

  

  Holotype. 
  — 
  Formerly 
  U. 
  S. 
  National 
  Museum, 
  no. 
  16204 
  (lost); 
  paratype: 
  Redpath 
  

   Museum, 
  no. 
  98 
  

  

  Distribution. 
  — 
  Cape 
  San 
  Lucas, 
  Lower 
  California 
  (type) 
  ; 
  San 
  Diego, 
  California, 
  to 
  Gulf 
  

   of 
  California 
  (Dall) 
  

  

  Ischnochiton 
  (Lepidozona) 
  sinudentatus 
  Carpenter 
  in 
  Pilsbry 
  

   (PI. 
  30, 
  figs. 
  8,9; 
  PI. 
  2,3, 
  figs. 
  1-5) 
  

  

  Ischnochiton 
  sinudentatus 
  Carpenter, 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  128; 
  D.'VLL, 
  

   1921, 
  p. 
  192; 
  Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  283; 
  Burch, 
  1947, 
  no. 
  66, 
  p. 
  18 
  subgenus 
  

   Lepidozona; 
  Smith 
  and 
  Gordon, 
  1948, 
  California 
  Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XXVI, 
  

   p. 
  208 
  subgenus 
  Lepidozona 
  

  

  Ischnochiton 
  {Lepidozona) 
  cf. 
  sinudentatus 
  "Carpenter," 
  Berry, 
  1922, 
  California 
  Acad. 
  Sci., 
  

   Proc., 
  ser. 
  4, 
  vol. 
  XI, 
  p. 
  476, 
  pi. 
  XII, 
  figs. 
  10-17 
  

  

  The 
  name 
  of 
  this 
  species 
  was 
  a 
  manuscript 
  name. 
  The 
  name 
  and 
  manuscript 
  description 
  

   were 
  utilized 
  by 
  Pilsbry 
  (1892) 
  when 
  the 
  name 
  became 
  valid. 
  The 
  type 
  material 
  consists 
  of 
  

   four 
  specimens 
  in 
  the 
  Carpenter 
  Collection 
  in 
  the 
  Redpath 
  Museum 
  on 
  the 
  original 
  Carpenter 
  

   glass 
  mount 
  and 
  latel. 
  The 
  label 
  states, 
  "type 
  California." 
  The 
  types 
  are 
  figured 
  for 
  the 
  

   first 
  time 
  herein. 
  

  

  Syntypes. 
  — 
  Redpath 
  Museum, 
  no. 
  27 
  

  

  Distribution. 
  — 
  Recent. 
  Alonterey, 
  California 
  (type) 
  ; 
  Pleistocene. 
  California 
  (Berry, 
  

   "cf.") 
  

  

  Subgenus 
  Rhombochiton 
  Berry, 
  1919 
  

  

  Rhombochiton 
  Berry, 
  1919, 
  California 
  Acad. 
  Sci., 
  Proc., 
  ser. 
  4, 
  vol. 
  IX, 
  p. 
  2 
  

  

  Type 
  species 
  by 
  original 
  designation, 
  Ischnochiton 
  rcgularis 
  (Carpenter), 
  1855, 
  Zool. 
  Soc. 
  

  

  London, 
  Proc, 
  p. 
  232. 
  Recent. 
  Atcndocino 
  County, 
  California, 
  to 
  Monterey, 
  California. 
  

  

  (pl. 
  31, 
  fig. 
  7) 
  

  

  Ischnochiton 
  (Rhombochiton) 
  regularis 
  (Carpenter) 
  

   (PI. 
  31, 
  fig. 
  7) 
  

  

  Chiton 
  regularis 
  Carpenter, 
  1855, 
  Zool. 
  Soc. 
  London, 
  Proc, 
  p. 
  232; 
  1857, 
  Rept. 
  British 
  

  

  Assoc. 
  Adv. 
  Sci. 
  1856, 
  p. 
  287, 
  318 
  genus 
  indet. 
  ; 
  1860, 
  Smith. 
  Misc. 
  Coll., 
  vol. 
  2, 
  art. 
  6, 
  

  

  p. 
  3 
  ; 
  1864b, 
  p. 
  554 
  Ischnochiton; 
  Reprint, 
  1872, 
  p. 
  40 
  

   Lepidopleurus 
  regularis 
  (Carpenter), 
  1864b, 
  p. 
  649; 
  1872, 
  Reprint, 
  p. 
  135 
  subgenus 
  of 
  

  

  Ischnochiton; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  Moll., 
  Geol. 
  Sur. 
  California, 
  p. 
  22 
  

   Ichnochiton 
  regularis 
  (Carpenter), 
  Dall, 
  1879, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  1, 
  p. 
  296, 
  fig. 
  

  

  14; 
  Keep, 
  1887, 
  West 
  Coast 
  Shells, 
  p. 
  107, 
  fig. 
  93; 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  

  

  p. 
  142, 
  pl. 
  18, 
  figs. 
  41-46 
  section 
  Radsiella; 
  Arnold, 
  1903, 
  p. 
  342 
  in 
  part; 
  Dall, 
  1921, 
  

  

  p. 
  193 
  Rhombochiton; 
  Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  285 
  

   Ischnochiton 
  {Rhombochiton) 
  regularis 
  (Carpenter), 
  Berry, 
  1919, 
  California 
  Acad. 
  Sci., 
  

  

  Proc, 
  ser. 
  4, 
  vol. 
  IX, 
  no. 
  1, 
  p. 
  2; 
  1922, 
  California 
  Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XI, 
  p. 
  470; 
  

  

  Smith 
  and 
  Gordon, 
  1948, 
  California 
  Acad. 
  Nat. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XXVI, 
  p. 
  207; 
  

  

  BiiRCH, 
  1947, 
  no. 
  66, 
  p. 
  18 
  

  

  