﻿AMPHINEURA 
  265 
  

  

  "A 
  small 
  specimen 
  in 
  Mr. 
  Cuming's 
  collection 
  was 
  passed 
  over 
  as 
  the 
  yoiuig 
  of 
  C. 
  

   Hartwegii; 
  but 
  a 
  fine 
  one 
  in 
  Mr. 
  Nuttall's 
  collection 
  distinctly 
  displays 
  the 
  points 
  of 
  dif- 
  

   ference 
  above 
  indicated, 
  which 
  at 
  present 
  appear 
  of 
  specific 
  value. 
  This 
  specimen 
  has 
  much 
  

   the 
  appearance 
  of 
  a 
  young 
  Ch. 
  articulatns, 
  but 
  differs 
  essentially 
  in 
  the 
  character 
  of 
  the 
  

   ligament." 
  [Carpenter, 
  1855, 
  p. 
  232] 
  

  

  G. 
  L. 
  Wilkins 
  (personal 
  communication, 
  October 
  17, 
  1950) 
  obligingly 
  furnished 
  the 
  fol- 
  

   lowing 
  information 
  in 
  regard 
  to 
  possible 
  type 
  specimens 
  in 
  the 
  British 
  Museimi 
  : 
  

  

  "We 
  have 
  a 
  specimen 
  of 
  Chiton 
  nuttalli 
  Carpenter. 
  Were 
  it 
  not 
  for 
  the 
  fact 
  that 
  it 
  is 
  

   marked 
  'Mus. 
  Cuming' 
  it 
  might 
  well 
  have 
  been 
  the 
  small 
  si>ecimen 
  as 
  'passed 
  over' 
  on 
  p. 
  232 
  

   P.Z.S. 
  1855. 
  It 
  is 
  too 
  small 
  for 
  the 
  type. 
  The 
  locality 
  is 
  given 
  as 
  'Santa 
  Barbara' 
  — 
  perhaps 
  

   a 
  paratype?" 
  

  

  Since 
  the 
  small 
  specimen 
  "passed 
  over" 
  should 
  be 
  from 
  "Mus. 
  Cuming," 
  the 
  specimen 
  

   referred 
  to 
  by 
  Wilkins 
  could 
  possibly 
  be 
  the 
  one 
  mentioned 
  by 
  Carpenter. 
  The 
  locality 
  does 
  

   not 
  correspond 
  to 
  what 
  might 
  be 
  intimated 
  by 
  Carpenter 
  in 
  the 
  description. 
  The 
  only 
  refer- 
  

   ence 
  to 
  "Santa 
  Barbara" 
  by 
  Carpenter 
  is 
  to 
  the 
  "Santa 
  Barbara 
  group 
  of 
  islands 
  (1864b, 
  

   p. 
  649; 
  1872, 
  p. 
  135) 
  

  

  Smith 
  and 
  Gordon 
  (1948, 
  p. 
  205) 
  expressed 
  the 
  opinion 
  that 
  this 
  form 
  is 
  the 
  young 
  of 
  

   C. 
  hartzvegii. 
  

  

  The 
  included 
  photograph 
  of 
  the 
  holotype 
  has 
  been 
  co-operatively 
  furnished 
  by 
  the 
  officials 
  

   of 
  the 
  British 
  Museum 
  (Natural 
  History), 
  G. 
  L. 
  Wilkins 
  of 
  the 
  Mollusca 
  Section, 
  ferreted 
  

   out 
  the 
  specimen 
  and 
  described 
  its 
  status 
  and 
  measurements 
  (Personal 
  communication, 
  

   March 
  2, 
  1951 
  and 
  July 
  10, 
  1951). 
  

  

  Holotype.— 
  Bv'ithh. 
  Museum 
  (Natural 
  History), 
  61.5.20.102 
  

  

  Distribution.— 
  ^iontfivty, 
  California 
  (type) 
  

  

  Cyanoplax 
  dentiens 
  (Gould) 
  

  

  Chiton 
  dentiens 
  Gould, 
  1846, 
  Boston 
  Soc. 
  Nat. 
  Hist., 
  Proc, 
  vol. 
  2, 
  p. 
  145 
  

  

  Chiton 
  (Onithochiton) 
  dentiens 
  Gould, 
  1852, 
  U. 
  S. 
  Expl. 
  Exped., 
  Moll., 
  p. 
  321, 
  pi. 
  28, 
  

  

  figs. 
  433-433b 
  

   Isclmochiton 
  pscudodentiens 
  Carpenter, 
  1864b, 
  p. 
  530, 
  606 
  = 
  C. 
  dentiens 
  Gould 
  type; 
  

  

  Reprint, 
  1872, 
  p. 
  16, 
  92 
  

   Ischnochiton 
  (Tracliydcrmon) 
  psendodenticns 
  Carpenter, 
  1864b, 
  p. 
  612; 
  Reprint, 
  1872, 
  

  

  p. 
  98; 
  1865, 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  Proc, 
  vol. 
  17, 
  p. 
  60 
  

   Trachydermon 
  pseudodentiens 
  (Carpenter), 
  1864b, 
  p. 
  649 
  = 
  type 
  of 
  C. 
  dentiens; 
  Reprint, 
  

  

  1872, 
  p. 
  135 
  ; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  Moll., 
  Geol. 
  Sur. 
  California, 
  p. 
  22 
  

   Ischnochiton 
  (Trachydermon) 
  dentiens 
  (Gould), 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  

  

  p. 
  73, 
  pi. 
  8, 
  figs. 
  61-65 
  

   Lepidochitona 
  dentiens 
  (Gould), 
  Dall, 
  1921, 
  p. 
  188; 
  Burch, 
  1947, 
  no. 
  66, 
  p. 
  18 
  

   Cyanopla.v 
  dentiens 
  (Gould), 
  Berry, 
  1948, 
  Leaflets 
  in 
  Malacology, 
  vol. 
  1, 
  no. 
  4, 
  p. 
  13, 
  14 
  

  

  Carpenter 
  was 
  explicit 
  in 
  explaining 
  that 
  his 
  name 
  /. 
  pseudodentiens 
  was 
  created 
  for 
  the 
  

   type 
  of 
  Gould's 
  Chiton 
  dentiens. 
  Therefore, 
  there 
  is 
  no 
  question 
  as 
  to 
  the 
  synonymy 
  of 
  

   Carpenter's 
  name 
  with 
  the 
  earlier 
  of 
  Gould. 
  As 
  Pilsbry 
  (1892) 
  explained 
  Gould 
  had 
  mis- 
  

   taken 
  spots 
  for 
  denticles. 
  Carpenter 
  noted 
  the 
  fact 
  and 
  supposed 
  a 
  new 
  name 
  was 
  required. 
  

  

  The 
  type 
  of 
  "Chiton 
  dentiens" 
  Gould 
  is 
  in 
  the 
  U. 
  S. 
  National 
  Museum, 
  no. 
  5824. 
  Two 
  

   other 
  suites 
  of 
  supplementary 
  material 
  of 
  the 
  species, 
  which 
  were 
  labelled 
  by 
  Carpenter 
  in 
  

   connection 
  with 
  his 
  name 
  pseudodentiens, 
  are 
  labelled 
  types 
  in 
  the 
  U. 
  S. 
  National 
  Museum. 
  

  

  A 
  complete 
  synonymy 
  or 
  discussion 
  of 
  C. 
  dentiens 
  (Gould) 
  is 
  not 
  intended 
  in 
  this 
  report. 
  

  

  Genus 
  Nuttallina 
  Dall, 
  1871 
  

  

  Nuttal!i)ia 
  Dall, 
  1871, 
  Amer. 
  Jour. 
  Concii., 
  vol. 
  VII, 
  p. 
  134 
  

  

  Type 
  species 
  by 
  monotypy, 
  N. 
  scabra 
  (Reeve) 
  Carpenter 
  — 
  Chiton 
  Californicus 
  [Nuttall, 
  

   ms.] 
  Reeve, 
  1847, 
  Conch. 
  Icon., 
  vol. 
  4, 
  Chiton, 
  pi. 
  XVI, 
  fig. 
  89. 
  Living. 
  Strait 
  of 
  Juan 
  

   de 
  Fuca 
  to 
  San 
  Diego, 
  California. 
  Pilsry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  pi. 
  54, 
  figs. 
  23, 
  

   25, 
  pi. 
  56, 
  figs. 
  12-18 
  

  

  Nuttallina 
  fluxa 
  (Carpenter) 
  

   (PI. 
  28, 
  figs. 
  16-19) 
  

  

  Chiton 
  scaber 
  Ree\'e, 
  1847, 
  Conch. 
  Icon., 
  vol. 
  IV, 
  Chiton, 
  pi. 
  XVII, 
  fig. 
  106. 
  Not 
  Chiton 
  

   scaber 
  Blainville, 
  1825 
  

  

  