﻿286 
  MARINE 
  IvrOLT.USCA 
  DESCRIBED 
  BY 
  V. 
  V. 
  CARPENTER 
  

  

  referred 
  to 
  the 
  nude 
  name, 
  "Trachydcnnon 
  flcctcns 
  viontcrcycnsis 
  Bartsch," 
  whicli 
  had 
  ap- 
  

   peared 
  in 
  print 
  but 
  never 
  been 
  described. 
  Berry 
  referred 
  the 
  latter 
  to 
  Mopalia 
  hcathii 
  Pilsbry 
  

   in 
  Berry 
  (1911, 
  p. 
  490, 
  figs. 
  4-7, 
  pi. 
  XI, 
  figs. 
  1-3, 
  7) 
  

  

  Family 
  Acantuociiitonidae 
  

   Genus 
  Acanthochitona 
  Gray, 
  1821 
  

  

  Acanthochltona 
  Gkay, 
  1821, 
  London 
  Medical 
  Repository, 
  p. 
  234 
  

  

  Type 
  species 
  by 
  nionotypy 
  Chiton 
  fascicularis 
  Linnaeus, 
  1767, 
  Syst. 
  Nat., 
  XII 
  ed., 
  p. 
  llOo. 
  

  

  Living. 
  Northern 
  Europe, 
  south 
  tlirougli 
  Mediterranean. 
  Pil.shky, 
  1893, 
  Man. 
  Conch., 
  

  

  vol. 
  XV, 
  pi. 
  4, 
  figs. 
  77, 
  78, 
  79 
  

  

  Acanthochitona 
  avicula 
  (Carpenter) 
  

   (PI. 
  32, 
  fig. 
  4) 
  

  

  Acanthuchitcs 
  avicula 
  Carpenter, 
  1864b, 
  p. 
  612, 
  650; 
  Reprint, 
  1872, 
  p. 
  98, 
  136; 
  1866a, 
  Cali- 
  

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

   California, 
  p. 
  23; 
  Pii.srry, 
  1893, 
  Man. 
  Conch., 
  vol. 
  XV, 
  p. 
  24, 
  Acanthochitona 
  aincula 
  

   (Carpenter), 
  Dall, 
  1921, 
  p. 
  197; 
  Berry, 
  1922, 
  California 
  Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  

   XI, 
  no. 
  18, 
  p. 
  456, 
  pi. 
  VI, 
  fig. 
  9; 
  Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  318; 
  Burcii, 
  1947, 
  no. 
  

   66, 
  p. 
  19; 
  Smith 
  and 
  Gordon, 
  1948, 
  California 
  Acad. 
  Sci., 
  Proc., 
  vol. 
  Ill, 
  p. 
  206 
  

  

  "Like 
  arragonites, 
  but 
  valves 
  sculptured 
  in 
  large 
  snake-skin 
  pattern. 
  8-20 
  fm. 
  r. 
  Cp." 
  

   [Carpenter, 
  1864b, 
  p. 
  6501 
  

  

  Oldroyd 
  (1927) 
  republished 
  the 
  Latin 
  description 
  (1866a) 
  and 
  Pilsbry 
  (1893) 
  presented 
  

   a 
  translation 
  of 
  the 
  description 
  which 
  was 
  also 
  copied 
  by 
  Oldroyd. 
  The 
  following 
  lines 
  should 
  

   be 
  added 
  to 
  make 
  that 
  copy 
  complete 
  : 
  

  

  ". 
  . 
  . 
  State 
  Collection, 
  no. 
  1072 
  

  

  "Hah. 
  Catalina 
  Island, 
  10-20 
  fm., 
  rare; 
  Cooper." 
  [Carpenter, 
  1866a, 
  p. 
  211[ 
  

  

  The 
  holotype 
  of 
  this 
  species 
  is 
  in 
  the 
  Redpath 
  Museum, 
  labelled 
  by 
  Carpenter, 
  "type 
  

   Catalina 
  Is. 
  Cp. 
  1072." 
  This 
  label 
  corresponds 
  with 
  Carpenter's 
  (1866a) 
  description. 
  

  

  Holotype. 
  — 
  Redpath 
  Museum, 
  no. 
  72 
  

  

  Distribution. 
  — 
  Recent. 
  Catalina 
  Island, 
  California 
  (type) 
  ; 
  Catalina 
  Island, 
  to 
  Gulf 
  of 
  

   California 
  (Dall). 
  Pleistocene. 
  California 
  (Berry) 
  

  

  