﻿280 
  ivfARTNE 
  ^rnrj.rscA 
  described 
  by 
  r. 
  r. 
  carpenter 
  

  

  Genus 
  Mopalia 
  Gray, 
  1847 
  

  

  Mopalia 
  Gray, 
  1847, 
  Zool. 
  Soc. 
  London, 
  Proc, 
  p. 
  65, 
  69, 
  169 
  

  

  Type 
  species 
  by 
  original 
  designation. 
  Chiton 
  Hindsii 
  Reeve, 
  1847, 
  Conch. 
  Icon., 
  vol. 
  4, 
  

  

  Chiton, 
  pi. 
  XII, 
  fig. 
  67a-b. 
  Recent. 
  Alaska, 
  to 
  Gulf 
  of 
  California. 
  Pilsbry, 
  1892, 
  Man. 
  

  

  Conch., 
  vol. 
  XIV, 
  pi. 
  62, 
  figs. 
  99, 
  100; 
  pi. 
  63, 
  fig. 
  57 
  

  

  Mopalia 
  acuta 
  (Carpenter) 
  

   (PL 
  31, 
  fig. 
  18; 
  Pi. 
  32, 
  fig. 
  6) 
  

  

  Chiton 
  acutiis 
  Carpenter, 
  1855, 
  Zool. 
  Soc. 
  London, 
  Proc, 
  p. 
  232; 
  1856, 
  Zool. 
  Soc. 
  London, 
  

   Proc, 
  p. 
  221; 
  1857, 
  Rept. 
  British 
  Assoc 
  Adv. 
  Sci. 
  1856, 
  p. 
  198, 
  318; 
  1860, 
  Smith. 
  Misc 
  

   Coll., 
  vol. 
  2, 
  art. 
  6, 
  p. 
  3 
  ; 
  1864b, 
  p. 
  527, 
  648, 
  Reprint, 
  1872, 
  p. 
  13, 
  134 
  

  

  "Chiton 
  (Mopalia) 
  lignosa 
  Gld. 
  var. 
  acuta 
  Cpr.," 
  Dall, 
  /;; 
  Orcutt, 
  1886, 
  U. 
  S. 
  Nat. 
  Mus., 
  

   Proc, 
  vol. 
  8, 
  p. 
  544 
  

  

  Mopalia 
  )niiscosa 
  acuta 
  (Carpenter), 
  Pilsuuy, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  297, 
  pi. 
  64, 
  

   figs. 
  75-79; 
  Dall, 
  1921, 
  p. 
  195; 
  Oldkovd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  306 
  

  

  Mopalia 
  nniscosa 
  phiuwsa 
  Carpenter 
  ms. 
  in 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  298, 
  

   pi. 
  64, 
  figs. 
  80, 
  81 
  

  

  Mopalia 
  muscosa 
  fissa 
  Carpenter 
  ms. 
  in 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  299 
  

  

  Mopalia 
  acuta 
  (Carpenter), 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  Moll., 
  Geol. 
  Sur. 
  California, 
  p. 
  22; 
  

   1871, 
  Amer. 
  Jour. 
  Conch., 
  vol. 
  VI, 
  p. 
  59; 
  Berry, 
  1922, 
  California 
  Acad. 
  Sci., 
  Proc, 
  

   .ser. 
  4, 
  vol. 
  XI, 
  p. 
  446, 
  text 
  fig. 
  9, 
  pi. 
  V, 
  figs. 
  10-11; 
  Burch, 
  1947, 
  no. 
  66, 
  p. 
  19; 
  Smith 
  

   AND 
  Gordon, 
  1948, 
  California 
  Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XXVI, 
  p. 
  206 
  

  

  A 
  copy 
  of 
  the 
  original 
  description 
  was 
  published 
  by 
  Oldroyd 
  (1927). 
  The 
  following 
  

   should 
  be 
  changed 
  in 
  her 
  copy 
  : 
  

  

  Line 
  2: 
  read 
  "tenebrosioribus" 
  for 
  "tenebrosioibus." 
  

   Add: 
  

  

  "Hah. 
  Sta. 
  Barbara 
  : 
  olim 
  legit 
  T. 
  Nuttall. 
  Mus. 
  suo. 
  

  

  "A 
  very 
  sharply 
  angled, 
  thin, 
  delicately 
  marked 
  species, 
  with 
  extremely 
  thin 
  margin, 
  and 
  

   the 
  edges 
  of 
  the 
  valves 
  deeply 
  cut 
  within." 
  [Carpenter, 
  1855, 
  p. 
  232] 
  

  

  ".Subgeneric, 
  aberrant 
  form; 
  with 
  small 
  blunt 
  plate, 
  instead 
  of 
  post, 
  sinus, 
  between 
  the 
  

   two 
  principal 
  lobes." 
  [Carpenter 
  1864b, 
  p. 
  648] 
  

  

  Three 
  specimens 
  illustrated 
  by 
  Pilsbry 
  ( 
  1892) 
  were 
  considered 
  by 
  him 
  as 
  the 
  types. 
  He 
  

   considered 
  one 
  specimen 
  (pi. 
  64, 
  figs. 
  76, 
  77) 
  the 
  "holotype" 
  (Pilsbry, 
  May 
  15, 
  1951, 
  per- 
  

   sonal 
  communication). 
  They 
  were 
  collected 
  by 
  H. 
  Hemphill 
  at 
  San 
  Diego, 
  California. 
  How- 
  

   ever, 
  the 
  real 
  holotype 
  is 
  in 
  the 
  British 
  Museum. 
  It 
  is 
  in 
  the 
  Nuttall 
  Collection 
  and 
  bears 
  a 
  

   Nuttall 
  label, 
  "Chiton 
  incisus. 
  Sta. 
  Barbara". 
  There 
  is 
  also 
  in 
  Carpenter's 
  handwriting 
  the 
  

   following 
  note, 
  "Comp. 
  acutus. 
  Cpr. 
  Probably 
  I 
  found 
  inciscus 
  preoccupied." 
  (Fide 
  G. 
  L. 
  

   Wilkins, 
  Jan. 
  1, 
  1952, 
  personal 
  communication.) 
  A 
  photograph 
  of 
  the 
  type 
  was 
  furnished 
  by 
  

   the 
  British 
  Museum 
  

  

  The 
  type 
  of 
  M. 
  plumosa. 
  Carpenter 
  in 
  Pilsbry 
  is 
  in 
  tiie 
  Newcomb 
  Collection 
  (25530), 
  

   Geology 
  Department, 
  Cornell 
  University. 
  The 
  drawings 
  made 
  of 
  that 
  type 
  for 
  Carpenter 
  

   were 
  published 
  by 
  Pilsbry. 
  

  

  Pilsbry 
  also 
  included 
  a 
  description 
  of 
  M. 
  fissa 
  Carpenter 
  ms. 
  but 
  did 
  not 
  illustrate 
  the 
  

   holotype, 
  which 
  he 
  stated 
  was 
  from 
  Monterey. 
  Pilsbry 
  regarded 
  botii 
  M. 
  plitnwsa 
  and 
  M. 
  

   fissa 
  as 
  synonymous 
  with 
  M. 
  acuta 
  (Carpenter). 
  

  

  A 
  specimen 
  in 
  the 
  Redpath 
  Museum 
  is 
  labelled 
  by 
  Carpenter, 
  'Mopalia 
  filosa 
  Cpr. 
  MS. 
  

   type 
  St. 
  Barbara 
  Cooper 
  plumosa 
  & 
  acuta." 
  This 
  certainly 
  is 
  the 
  "M. 
  fissa" 
  Carpenter 
  ms. 
  

   in 
  Pilsbry. 
  M. 
  filosa 
  Carpenter 
  ms. 
  is 
  a 
  namcn 
  nudum 
  and 
  is 
  cither 
  an 
  error 
  for 
  fissa, 
  or 
  

   the 
  fissa 
  is 
  an 
  error 
  for 
  filosa. 
  They 
  equal 
  the 
  same 
  and 
  are 
  regarded 
  as 
  equivalent 
  to 
  M. 
  

   acuta 
  Carpenter. 
  The 
  photo 
  of 
  "M. 
  filosa" 
  type 
  is 
  included 
  to 
  illustrate 
  the 
  character 
  of 
  

   fissa. 
  Photographs 
  of 
  the 
  type 
  A. 
  filosa 
  Carpenter 
  ms. 
  were 
  sent 
  to 
  Allyn 
  Smith 
  in 
  1945. 
  

   Mr. 
  Smith 
  (Personal 
  communication) 
  wrote, 
  "The 
  species 
  is 
  undoubtedly 
  what 
  we 
  are 
  now 
  

   calling 
  Mopalia 
  acuta 
  (Carpenter), 
  whicli 
  Dall 
  i>laces 
  as 
  a 
  subspecies 
  of 
  M. 
  muscosa 
  (jould, 
  

   which 
  I 
  believe 
  is 
  not 
  justified." 
  

  

  "Mopalia 
  filosa 
  Ci)r. 
  MS." 
  is 
  not 
  the 
  Artliuria 
  filosa 
  Cari)entcr 
  ms. 
  in 
  Dall 
  (1882, 
  p. 
  287) 
  

   and/or 
  in 
  Pilsbry 
  (1892, 
  p. 
  258). 
  

  

  