﻿AMPHINEURA 
  

  

  277 
  

  

  The 
  original 
  description 
  of 
  this 
  species 
  as 
  well 
  as 
  Pilshry's 
  extended 
  notes 
  were 
  repub- 
  

   lished 
  by 
  Oldroyd 
  (1927). 
  The 
  following 
  should 
  be 
  changed 
  in 
  her 
  copy: 
  Last 
  line, 
  read 
  

   25 
  for 
  25. 
  

  

  Add: 
  

  

  "Var. 
  T. 
  cacrulca, 
  strii/is 
  propc 
  manjincni 
  siibgranulosis. 
  

   "Hab. 
  Monterey; 
  sub 
  saxis 
  legit 
  — 
  Hartwcg. 
  Mus. 
  Cuming. 
  

  

  "A 
  very 
  similar 
  species, 
  but 
  with 
  larger 
  scales 
  on 
  the 
  margin, 
  is 
  _f 
  rom 
  New 
  Zealand, 
  and 
  

   at 
  present 
  undescribed 
  in 
  the 
  Cumingian 
  Collection." 
  [Carpenter, 
  1855] 
  

  

  G. 
  L. 
  Wilkins 
  (British 
  Museum) 
  supplied 
  the 
  following 
  information 
  regarding 
  the 
  holo- 
  

   type: 
  

  

  "There 
  is 
  little 
  doubt 
  that 
  a 
  shell 
  we 
  have 
  labelled 
  'Monterey' 
  and 
  a 
  reference 
  to 
  the 
  

   P.Z.D. 
  is 
  the 
  type 
  of 
  this 
  species. 
  Size 
  o.k." 
  

  

  The 
  figures 
  of 
  this 
  species 
  by 
  Pilsbry 
  are 
  likely 
  those 
  of 
  the 
  type 
  material, 
  probably 
  from 
  

   the 
  Carpenter 
  ms. 
  illustrations. 
  The 
  figures 
  were 
  drawn 
  by 
  Emerton 
  under 
  Carpenter's 
  su- 
  

   pervision. 
  The 
  included 
  illustration 
  was 
  furnished 
  by 
  the 
  authorities 
  of 
  the 
  British 
  Museum 
  

   (Natural 
  History). 
  

  

  Carpenter's 
  references 
  (1864b) 
  are 
  not 
  cross-referenced. 
  Under 
  Chiton 
  regnlaris 
  in 
  the 
  

   index 
  (1872, 
  p. 
  35), 
  reference 
  is 
  to 
  page 
  40 
  only 
  with 
  the 
  additional 
  reference, 
  1857, 
  pages 
  

   287, 
  318, 
  and 
  1855, 
  page 
  232. 
  In 
  the 
  same 
  publication 
  (1872) 
  index 
  (p. 
  62) 
  under 
  Lepido- 
  

   pleurus 
  regularis, 
  page 
  135 
  only 
  is 
  indicated. 
  On 
  page 
  135 
  Carpenter 
  referred 
  L. 
  rcgularis 
  to 
  

   "P.Z.S., 
  p. 
  232", 
  so 
  that 
  he 
  referred 
  to 
  the 
  same 
  species. 
  The 
  following 
  remarks 
  were 
  in- 
  

   serted 
  : 
  

  

  "Subgenus 
  of 
  Ischnochiton: 
  mantle-scales 
  Lophyroid, 
  generally 
  striated. 
  Sp. 
  arched, 
  green 
  

   shagreened. 
  Side 
  lobes 
  2-4: 
  eaves 
  spongj', 
  not 
  projecting." 
  [Carpenter, 
  1864b, 
  p. 
  649: 
  1872, 
  

   p. 
  135] 
  

  

  Fortunately 
  this 
  is 
  not 
  Carpenter's 
  original 
  description, 
  for 
  at 
  the 
  later 
  date 
  he 
  indicated 
  

   the 
  occurrence 
  as 
  "California: 
  or 
  district 
  north 
  of 
  the 
  peninsula, 
  generally." 
  Originally 
  the 
  

   type 
  locality 
  was 
  stipulated 
  as 
  Monterey. 
  

  

  Holo 
  type. 
  —British 
  Museum 
  (Natural 
  History), 
  Department 
  of 
  Zoology, 
  B.M. 
  1950, 
  

   11.9.1 
  

  

  Distribution. 
  — 
  Recent. 
  Monterey, 
  California 
  (type) 
  : 
  Mendocino 
  County, 
  California, 
  to 
  

   Monterey, 
  California 
  (Dall). 
  Pleistocene. 
  (Arnold; 
  Berry) 
  

  

  Subgenus 
  Tripoplax 
  Berry, 
  1919 
  

  

  Tripoplax 
  Berry, 
  1919. 
  California 
  Acad. 
  Sci., 
  Proc., 
  ser. 
  4, 
  vol. 
  IX, 
  no. 
  1, 
  p. 
  1 
  

  

  Type 
  species 
  by 
  original 
  designation 
  Ischnochiton 
  trifidns 
  (Carpenter), 
  1864b, 
  p. 
  649. 
  

  

  Recent. 
  Shumagin 
  Islands, 
  Alaska 
  to 
  Puget 
  Sound, 
  Washington. 
  Pilsbry, 
  1892, 
  Alan. 
  

  

  Conch., 
  vol. 
  XIV, 
  pi. 
  18, 
  fig. 
  40 
  ; 
  1893, 
  vol. 
  XV, 
  pi. 
  17, 
  figs. 
  64-67 
  type 
  

  

  Ischnochiton 
  (Tripoplax) 
  trifidus 
  (Carpenter) 
  

  

  Trachydcrmon 
  trifidus 
  Carpenter, 
  1864b, 
  p. 
  649; 
  Reprint, 
  1872, 
  p. 
  135; 
  Cooper, 
  1867, 
  Geog. 
  

  

  Cat. 
  Moll., 
  Geol. 
  Sur. 
  California, 
  p. 
  22 
  

   Ischnochiton 
  trifidus 
  (Carpenter), 
  1865, 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  Proc, 
  vol. 
  17. 
  p. 
  60; 
  

  

  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  141, 
  pi. 
  18, 
  fig. 
  40 
  section 
  Radsielh: 
  1893, 
  Man. 
  

  

  Conch., 
  vol. 
  XV, 
  p. 
  86, 
  pi. 
  17, 
  figs. 
  64, 
  65 
  type, 
  66, 
  67 
  section 
  Ischnoradsia 
  : 
  Dall. 
  1921, 
  

  

  p. 
  193. 
  section 
  Tripoplax: 
  Oldroyd. 
  1924, 
  Pub. 
  Puget 
  Sound 
  Biol. 
  Station, 
  vol. 
  4, 
  p. 
  193; 
  

  

  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  285 
  section 
  Tripoplax 
  

   Isnoradsia 
  [sic] 
  trifida 
  Carpenter, 
  Dall, 
  1871. 
  Amer. 
  Jour. 
  Conch., 
  vol. 
  VII, 
  p. 
  135 
  

   Ischnoradsia 
  trifida 
  (Carpenter), 
  Dall, 
  1879, 
  U. 
  S. 
  Nat. 
  Mus.. 
  Proc. 
  vol. 
  1. 
  p. 
  331 
  

   Ischnochiton 
  (Ischnoradsia) 
  trifidus 
  (Carpenter), 
  Berry, 
  1917, 
  California 
  Acad. 
  Sci., 
  Proc, 
  

  

  ser. 
  4, 
  vol. 
  VII, 
  no. 
  10, 
  p. 
  238 
  

   Ischnochiton 
  (Tripoplax) 
  trifidus 
  (Carpenter). 
  Berry, 
  1919, 
  California 
  Acad. 
  Sci., 
  Proc, 
  

  

  ser. 
  4, 
  vol. 
  IX, 
  p. 
  1 
  ; 
  Burch. 
  1947, 
  no. 
  66, 
  p. 
  18 
  

  

  "Centre-punctures 
  few, 
  deep: 
  2-4 
  blunt 
  ribs: 
  side 
  plates 
  with 
  2 
  slits." 
  [Carpenter, 
  1864b, 
  

   p. 
  649] 
  

  

  "I.t. 
  elevata, 
  ovali, 
  rubida 
  ; 
  valvis 
  latis. 
  subquadratis, 
  apicibus 
  vix 
  intortis 
  ; 
  areis 
  latcralibus 
  

   subelevatis, 
  costis 
  obsoletis 
  rotundatis 
  ii-iv 
  ; 
  areis 
  centralibus 
  punctis 
  distantibus, 
  valde 
  im- 
  

  

  