﻿AMPHINEURA 
  

  

  269 
  

  

  Chiton 
  tc.rtilis 
  Gray, 
  1828, 
  Spicilegia 
  Zoologica, 
  vol. 
  1, 
  pt. 
  1, 
  p. 
  5, 
  pi. 
  6, 
  fig. 
  20. 
  Living. 
  

   Cape 
  of 
  Good 
  Hope. 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  98, 
  99 
  

  

  Ischnochiton 
  newcombi 
  Carpenter 
  in 
  Pilsbry 
  

   (PI. 
  30, 
  figs. 
  1-5) 
  

  

  Ischnochiton 
  nezvcovtbi 
  Carpenter 
  in 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  120; 
  Dall, 
  

   1921, 
  p. 
  191; 
  Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  278; 
  Burch, 
  1947, 
  no. 
  66, 
  p. 
  18 
  

  

  Carpenter's 
  manuscript 
  name 
  and 
  description 
  were 
  pubh'shed 
  by 
  Pilsbry. 
  The 
  holotype 
  is 
  

   figured 
  herein 
  for 
  the 
  first 
  time. 
  The 
  type 
  material 
  consists 
  of 
  two 
  specimens 
  in 
  the 
  Car- 
  

   penter 
  Collection 
  in 
  the 
  Redpath 
  Museum. 
  They 
  are 
  on 
  an 
  original 
  Carpenter 
  glass 
  mount 
  

   with 
  his 
  label, 
  "type 
  Catalina 
  Is. 
  Newcomb." 
  There 
  is, 
  however, 
  a 
  mixture 
  of 
  specimens, 
  

   and 
  the 
  two 
  individuals 
  do 
  not 
  represent 
  the 
  same 
  species. 
  Both 
  have 
  different 
  sculpture. 
  

   Figures 
  1-5 
  represent 
  /. 
  newcombi. 
  There 
  are 
  microscopic 
  granulations 
  present 
  on 
  the 
  

   central 
  area 
  of 
  the 
  valves 
  which 
  do 
  not 
  appear 
  in 
  the 
  figures. 
  The 
  second 
  specimen 
  (pi. 
  30, 
  

   fig. 
  6) 
  is 
  a 
  worn 
  Chaetoplcura 
  gemma 
  Carpenter 
  in 
  Pilsbry. 
  

  

  //o/oh'/'c— 
  Redpath 
  Museum, 
  no. 
  19 
  

  

  Distribution. 
  — 
  Catalina 
  Island, 
  California 
  (type) 
  

  

  Ischnochiton 
  scabricostatus 
  (Carpenter) 
  

   (PI. 
  30, 
  figs. 
  10-12) 
  

  

  Ischnochiton 
  (Lepidopleunis) 
  scabricostatus 
  Carpenter, 
  1864b. 
  p. 
  612, 
  649; 
  Reprint, 
  1872, 
  

  

  p. 
  98, 
  135; 
  1866. 
  California 
  Acad. 
  Sci., 
  Proc, 
  vol. 
  Ill, 
  p. 
  212; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  

  

  Moll., 
  Geo!. 
  Sur. 
  California, 
  p. 
  22 
  

   Ischnochiton 
  scabricostatus 
  Carpenter, 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XI\', 
  p. 
  121; 
  1893, 
  

  

  Man. 
  Conch., 
  vol. 
  XV, 
  p. 
  76, 
  pi. 
  16, 
  figs. 
  55, 
  56; 
  1896. 
  Nautilus, 
  vol. 
  10, 
  no. 
  5, 
  p. 
  49; 
  

  

  Dall, 
  1921, 
  p. 
  191 
  ; 
  Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  276; 
  Burch, 
  1947, 
  no. 
  66, 
  p. 
  18 
  

  

  The 
  holotype 
  (1 
  specimen, 
  posterior 
  and 
  anterior 
  plates, 
  free) 
  in 
  the 
  U. 
  S. 
  National 
  

   Museum 
  is 
  figured 
  herein. 
  Since 
  up 
  to 
  Pilsbry's 
  time 
  only 
  one 
  specimen 
  had 
  been 
  found, 
  his 
  

   drawings 
  (1893) 
  are 
  presumably 
  of 
  the 
  type 
  plates. 
  Pilsbry 
  published 
  (1892) 
  a 
  translation 
  

   of 
  Carpenter's 
  (1866) 
  Latin 
  description 
  and 
  presented 
  further 
  details 
  of 
  description 
  and 
  

   corrections 
  (1893). 
  Oldroyd 
  republished 
  a 
  copy 
  of 
  Carpenter's 
  original 
  description 
  and 
  a 
  

   copy 
  of 
  Pilsbry's 
  translation. 
  

  

  The 
  following 
  should 
  be 
  added 
  to 
  the 
  copies 
  of 
  the 
  description 
  of 
  1866 
  to 
  make 
  those 
  

   notes 
  complete 
  : 
  

  

  "Hah. 
  Catalina 
  Island; 
  10-20 
  fm.. 
  Cooper." 
  [Carpenter, 
  1866, 
  p. 
  212] 
  

   The 
  specimen 
  (U. 
  S. 
  Nat. 
  Mus.) 
  is 
  labelled 
  "Type 
  Catalina 
  Id. 
  Cooper." 
  

  

  Holotype. 
  — 
  U. 
  S. 
  National 
  Museum, 
  no. 
  16268 
  

  

  Distribtiiion.— 
  Catalina. 
  Island. 
  California 
  (type) 
  ; 
  San 
  Pedro 
  and 
  Catalina 
  Island. 
  Cali- 
  

   fornia, 
  to 
  Cerros 
  Island, 
  Lower 
  California 
  (Dall) 
  

  

  Ischnochiton 
  veredentiens 
  Carpenter 
  

   (PI. 
  29, 
  figs. 
  9-14) 
  

  

  I.sThnochiton 
  veredentiens 
  Carpenter. 
  1864b. 
  p. 
  612, 
  649; 
  Reprint, 
  1872, 
  p. 
  98, 
  135; 
  1866, 
  

  

  California 
  Acad. 
  Sci., 
  Proc, 
  vol. 
  III. 
  p. 
  211; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  Moll., 
  Geol. 
  Sur. 
  

  

  California, 
  p. 
  22; 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  122; 
  Dall, 
  1921, 
  p. 
  191; 
  

  

  Oldroyd, 
  1927. 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  277: 
  Burch, 
  1947, 
  no. 
  66, 
  p. 
  18 
  

   Ischnochiton 
  {Lepidozona') 
  veredentiens 
  (Carpenter), 
  Smith 
  and 
  Gordon, 
  1948, 
  California 
  

  

  Acad. 
  Sci., 
  Proc, 
  ser 
  4, 
  vol. 
  XXVI, 
  p. 
  208 
  records 
  of 
  Point 
  Ano 
  Nuevo 
  need 
  confirming. 
  

  

  The 
  original 
  description 
  of 
  this 
  species 
  and 
  the 
  Latin 
  description 
  (1866) 
  as 
  well 
  as 
  

   Pilsbry's 
  translation 
  of 
  Carpenter's 
  description 
  were 
  republished 
  by 
  Oldroyd. 
  The 
  holotype 
  

   is 
  figured 
  for 
  the 
  first 
  time 
  herein. 
  It 
  was 
  no. 
  518a 
  (bis) 
  of 
  the 
  old 
  California 
  State 
  Col- 
  

   lection. 
  This 
  number 
  was 
  a 
  duplicate 
  number, 
  as 
  Carpenter 
  discovered. 
  Carpenter's 
  label 
  of 
  

   "Ischnochiton 
  subexpresstis 
  Cpr. 
  type 
  = 
  scabricostatus 
  Cooper 
  no. 
  518a" 
  was 
  apparently 
  the 
  

   original 
  518a 
  of 
  Cooper's 
  numbering. 
  

  

  