﻿272 
  AfARIXE 
  ArOLLUSCA 
  DESCRIBRD 
  BY 
  P. 
  P. 
  CARPKNTKR 
  

  

  Subgenus 
  Lepidozona 
  Pilsbry, 
  1892 
  

  

  Lepidocona 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  55, 
  125 
  

  

  Type 
  species 
  by 
  original 
  designation, 
  Ischnochiton 
  mcrtcnsii 
  Middendorff, 
  1847 
  (1846), 
  

   Acad. 
  Sci. 
  St. 
  Petersburg, 
  Bull., 
  vol. 
  VI, 
  p. 
  118. 
  Recent. 
  Sitka, 
  Alaska, 
  to 
  San 
  Martin 
  

   Island, 
  Lower 
  California. 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  pi. 
  26, 
  figs. 
  20-26 
  

  

  Ischnochiton 
  (Lepidozona) 
  aureotinctus 
  Carpenter 
  /;; 
  Pilsbry 
  

   (PI. 
  31, 
  figs. 
  1-4) 
  

  

  Ischnochiton 
  aureotinctus 
  Carpenter 
  m 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  123 
  ; 
  Dall, 
  

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

   Lepidozona 
  

  

  Carpenter's 
  manuscript 
  name 
  and 
  description 
  were 
  used 
  by 
  Pilsbry 
  (1892). 
  The 
  holotype 
  

   is 
  in 
  the 
  Carpenter 
  Collection 
  in 
  the 
  Redpath 
  Aluseum. 
  It 
  is 
  on 
  the 
  original 
  Carpenter 
  glass 
  

   mount 
  and 
  bears 
  the 
  label 
  "type 
  Catalina 
  Is. 
  80 
  fms. 
  Cooper 
  1071a." 
  The 
  1071a 
  refers 
  to 
  the 
  

   catalogue 
  number 
  of 
  the 
  old 
  California 
  State 
  Collection. 
  There 
  is 
  a 
  discrepancy 
  in 
  Carpenter's 
  

   laliel 
  and 
  writings. 
  In 
  the 
  description 
  of 
  " 
  Lcptochiton 
  nexus" 
  Carpenter 
  (1866, 
  p. 
  212) 
  wrote 
  

   "State 
  Collection, 
  1071a," 
  which 
  is 
  the 
  same 
  number 
  he 
  copied 
  on 
  the 
  label 
  of 
  the 
  holotyi)e 
  

   of 
  Ischnochiton 
  aureotinctus. 
  Tiie 
  holotypes 
  of 
  both 
  species, 
  respectively, 
  are 
  figured 
  herein 
  

   for 
  the 
  first 
  time. 
  

  

  The 
  holotype 
  is 
  a 
  poor 
  specimen 
  and 
  inadequate 
  for 
  identification. 
  It 
  consists 
  of 
  four 
  plates 
  

   and 
  a 
  bit 
  of 
  the 
  girdle. 
  They 
  are 
  light 
  orange 
  with 
  no 
  sculpture 
  except 
  possibly 
  microscopic 
  

   pustules. 
  It 
  does 
  not 
  have 
  the 
  coarser 
  striations 
  of 
  /. 
  ne.vits. 
  

  

  Holotype. 
  — 
  Redpath 
  Museum, 
  no. 
  26 
  

  

  Distribution. 
  — 
  Catalina 
  Island, 
  California 
  (type) 
  ; 
  Catalina 
  Island, 
  80 
  fathoms, 
  to 
  Cerros 
  

   Island, 
  Lower 
  California 
  (Dall) 
  

  

  Cf. 
  Ischnochiton 
  (Lepidozona) 
  californiensis 
  Berry 
  

  

  I. 
  pectinatus 
  Carpenter 
  

  

  (PI. 
  31, 
  figs. 
  5, 
  6) 
  

  

  ? 
  Ischnochiton 
  (Lcpidopleurus) 
  pectinatus 
  Carpenter, 
  1864b, 
  p. 
  612; 
  Reprint, 
  1872, 
  p. 
  98. 
  

  

  "Cat. 
  Is., 
  beach." 
  

   Not 
  Chiton 
  pectinatus 
  Sowerby, 
  1840 
  = 
  Ischjwchiton 
  

   ? 
  Lcpidopleurus 
  pectinatus 
  Carpenter, 
  1864b, 
  p. 
  649; 
  Reprint, 
  1872, 
  p. 
  135; 
  Cooper, 
  1867, 
  

  

  Geog. 
  Cat. 
  Moll., 
  Geol. 
  Sur. 
  California, 
  p. 
  22; 
  1871, 
  Amer. 
  Jour. 
  Conch., 
  vol. 
  VI, 
  p. 
  59 
  

   Ischnochiton 
  (Lcpidopleurus) 
  pectinatus 
  Carpenter, 
  1866, 
  California 
  Acad. 
  Nat. 
  Sci., 
  Proc., 
  

  

  ser. 
  1, 
  vol. 
  Ill, 
  p. 
  211 
  

   "Chiton 
  ( 
  Lcpidopleurus 
  ?) 
  pectinulatus 
  Cpr.," 
  Dall 
  in 
  Orcutt, 
  1886, 
  U. 
  S. 
  Nat. 
  Mus., 
  

  

  Proc, 
  vol. 
  8, 
  p. 
  544 
  nomen 
  nudum 
  

   Ischnochiton 
  clathratus 
  (Reeve), 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  129 
  in 
  part, 
  

  

  section 
  Lepidozona 
  

   Lcpidopleurus 
  pectinulatus 
  Carpenter, 
  ms. 
  /;( 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  129 
  

   Ischnochiton 
  (Lepidozona) 
  pectinulatus 
  "Carpenter," 
  Berry, 
  1922, 
  California 
  Acad. 
  Sci., 
  

  

  Proc, 
  ser. 
  4, 
  vol. 
  XI, 
  no. 
  18, 
  p. 
  471, 
  pi. 
  X, 
  figs. 
  4-6 
  

   Ischnochiton 
  (Lepidozona) 
  californiensis 
  Berry, 
  1931, 
  Malacol. 
  Soc. 
  London, 
  Proc, 
  vol. 
  19, 
  

  

  pt. 
  V, 
  pi. 
  29, 
  figs. 
  1, 
  2 
  

  

  "Olive: 
  strong 
  sculpture 
  over 
  shagreened 
  surface: 
  side 
  areas 
  ribbed: 
  outer 
  margin 
  and 
  

   inner 
  sutures 
  pectinated, 
  Bch. 
  Cp." 
  [Carpenter, 
  1864b, 
  p. 
  649] 
  

   ". 
  . 
  . 
  State 
  Collection, 
  no. 
  1073. 
  

  

  "Lt. 
  'L. 
  Mertensii' 
  simili, 
  sed 
  omino 
  olivaceo; 
  areis 
  diagonalibus 
  radiis 
  plerumque 
  IV. 
  

   dense 
  tuberculiferis, 
  radioque 
  altero 
  suturali 
  tuberculis 
  iiifle.xis, 
  margines 
  valvarum 
  pecti- 
  

   nantibus 
  ; 
  costis 
  transversis 
  crebris 
  validis; 
  costulis 
  longitudinalis 
  acutis 
  distantibus 
  super- 
  

   antibus, 
  quarum 
  margines 
  suturas 
  anticas 
  pectinant 
  ; 
  valv. 
  term, 
  ut 
  in 
  areis 
  diag. 
  sculptis, 
  

   seriebus 
  tuberculorum 
  creberrimis 
  ; 
  tota 
  superficie 
  minutissime 
  tuberculata 
  : 
  intus, 
  valvis 
  

   centralibus 
  unifissatis, 
  terminalibus 
  XI-XV 
  — 
  fissatis 
  : 
  scabs 
  jjallii 
  irregularibus, 
  confertis, 
  

   minutissime 
  longitudinaliter 
  striatis. 
  

  

  "Long. 
  0.85, 
  lat. 
  0.50, 
  div. 
  110°. 
  

  

  "Variat 
  : 
  interdum 
  aurantio 
  nebulosa. 
  

  

  "Ilah. 
  Catalina 
  Island, 
  Santa 
  Barbara 
  Island, 
  beach, 
  Cooper." 
  [Carpenter, 
  1866a, 
  p. 
  212] 
  

  

  