﻿268 
  MARINE 
  MOLLUSCA 
  DESCRIBED 
  BY 
  P. 
  P. 
  CARPENTER 
  

  

  Proc, 
  vol. 
  I, 
  p. 
  , 
  297. 
  Recent. 
  San 
  Diego, 
  California, 
  to 
  San 
  Ignacio 
  Lagoon, 
  Lxjwer 
  

  

  California, 
  (pi. 
  27, 
  fig. 
  7) 
  

  

  The 
  authorship 
  and 
  date 
  of 
  the 
  establishment 
  of 
  the 
  above 
  generic 
  name 
  is 
  involved 
  in 
  

   the 
  same 
  technicality 
  as 
  that 
  of 
  the 
  type 
  species. 
  In 
  the 
  first 
  reference 
  cited 
  Dall 
  used 
  

   several 
  of 
  Carpenter's 
  manuscript 
  names, 
  both 
  generic 
  and 
  specific. 
  In 
  the 
  case 
  of 
  the 
  

   specific 
  names 
  he 
  described 
  only 
  the 
  dentition 
  of 
  the 
  radula. 
  If 
  this 
  case 
  can 
  be 
  construed 
  

   as 
  belonging 
  under 
  Article 
  27, 
  Int. 
  Rules 
  of 
  Zoological 
  Nomenclature, 
  the 
  names 
  so 
  intro- 
  

   duced 
  by 
  Dall 
  (1879) 
  are 
  available. 
  Pallochiton 
  would 
  date 
  from 
  Dall, 
  1879, 
  because 
  the 
  

   name 
  of 
  its 
  monotype 
  is 
  validated 
  at 
  the 
  same 
  time. 
  Dall, 
  1882, 
  is 
  usually 
  given 
  for 
  Pal- 
  

   lochiton. 
  If 
  the 
  validity 
  of 
  Pallochiton 
  and 
  P. 
  lanuginosus 
  is 
  not 
  accepted 
  as 
  of 
  Dall, 
  1879, 
  

   then 
  the 
  same 
  names 
  would 
  date 
  from 
  Dall, 
  1882, 
  the 
  generic 
  and 
  specific 
  description 
  being 
  

   synonymous. 
  

  

  Pallochiton 
  lanuginosus 
  "Dall" 
  

  

  Pallochiton 
  lanuginosus 
  Pilsbry 
  

  

  (PI. 
  27, 
  fig. 
  7) 
  

  

  Hemphillia 
  lanuginosa 
  Carpenter, 
  ms. 
  

  

  Pallochiton 
  lanuginosus 
  Carpenter, 
  ms., 
  Dall, 
  1879, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  1, 
  p. 
  297, 
  

  

  pi. 
  Ill, 
  fig. 
  21, 
  dentition; 
  1882, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  4, 
  p. 
  287 
  

   Chiton 
  {Pallochiton) 
  lanuginosa 
  Carpenter, 
  ms., 
  Dall 
  in 
  Orcutt, 
  1886, 
  U. 
  S. 
  Nat. 
  Mus., 
  

  

  Proc, 
  vol. 
  8, 
  p. 
  544; 
  Carpenter 
  in 
  Pilsbry, 
  1892, 
  Man. 
  Conch., 
  vol. 
  XIV, 
  p. 
  257, 
  pi. 
  56, 
  

  

  figs. 
  1-11; 
  Dall, 
  1921, 
  p. 
  193; 
  Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  291 
  

   Chaetopleura 
  {Pallochiton) 
  languinostis 
  [sic] 
  Pilsbry, 
  BuRcn, 
  1947, 
  no. 
  66, 
  p. 
  18; 
  1947, 
  no. 
  

  

  68, 
  p. 
  5 
  

  

  If 
  the 
  description 
  and 
  figure 
  of 
  the 
  radula 
  by 
  Dall 
  in 
  1879 
  validate 
  the 
  specific 
  name 
  in 
  

   the 
  case 
  of 
  Ischnochiton 
  cooperi, 
  Chaetopleura 
  gemma, 
  and 
  /. 
  rcgularis, 
  as 
  intimated 
  by 
  

   authors 
  (Burch, 
  1947; 
  Smith 
  and 
  Gordon, 
  1948) 
  then 
  the 
  specific 
  name 
  of 
  this 
  species 
  

   should 
  date 
  from 
  Dall, 
  1879, 
  also. 
  In 
  this 
  case 
  Dall 
  used 
  Carpenter's 
  manuscript 
  name 
  and 
  

   probably 
  studied 
  Carpenter's 
  notes. 
  Dall 
  did 
  not 
  specify 
  a 
  type. 
  Dall 
  (1882), 
  in 
  an 
  indirect 
  

   description 
  of 
  Pallochiton, 
  presented 
  details 
  of 
  the 
  species, 
  P. 
  lanuginosus. 
  

  

  There 
  are 
  in 
  the 
  Carpenter 
  Collection 
  in 
  the 
  Redpath 
  Museum 
  five 
  specimens 
  on 
  original 
  

   glass 
  mounts 
  with 
  a 
  Carpenter 
  label 
  "Hemphillia 
  lanuginosus 
  Cpr. 
  type 
  Todos 
  Santos 
  Bay 
  

   Lower 
  California 
  H. 
  Hemphill." 
  An 
  illustration 
  of 
  one 
  of 
  those 
  complete 
  types 
  which 
  re- 
  

   veals 
  the 
  beautiful 
  sculpture 
  is 
  included 
  herein. 
  

  

  The 
  note 
  in 
  Oldroyd 
  that 
  the 
  type 
  is 
  in 
  the 
  U. 
  S. 
  National 
  Museum 
  is 
  incorrect. 
  

  

  Pilsbry 
  (1892) 
  presented 
  a 
  complete 
  description 
  of 
  the 
  species 
  and 
  used 
  drawings 
  made 
  

   by 
  himself 
  as 
  well 
  as 
  drawings 
  which 
  had 
  been 
  supervised 
  by 
  Carpenter. 
  Pilsbry 
  (Personal 
  

   communication. 
  May 
  15, 
  1951) 
  considered 
  that 
  his 
  description 
  was 
  the 
  first 
  and 
  selected 
  

   the 
  specimen 
  of 
  Figure 
  4 
  of 
  Plate 
  56 
  of 
  his 
  original 
  illustrations 
  as 
  the 
  lectotype. 
  His 
  types 
  

   are 
  from 
  Pt. 
  Abreojos, 
  Lower 
  California, 
  and 
  are 
  in 
  the 
  Academy 
  of 
  Natural 
  Sciences. 
  

  

  The 
  several 
  species, 
  the 
  names 
  of 
  which 
  were 
  published 
  by 
  Dall 
  (1879) 
  in 
  connection 
  

   with 
  the 
  dentition 
  only, 
  cannot 
  be 
  identified 
  by 
  Dall's 
  remarks. 
  For 
  value 
  to 
  workers 
  the 
  

   authority 
  should 
  date 
  with 
  Pilsbry, 
  1892. 
  

  

  7v/'<'.f.— 
  Syntypes 
  : 
  Redpath 
  Museum, 
  no. 
  66 
  (of 
  Dall); 
  lectotypcs 
  and 
  paratypes 
  : 
  

   Acaemy 
  of 
  Natural 
  Sciences, 
  Philadelphia, 
  no. 
  35684 
  (of 
  Pilsbry). 
  

  

  Distribution.— 
  Todos 
  Santos 
  Bay, 
  Lower 
  California 
  (type, 
  Dall) 
  : 
  Pt. 
  Abreojos, 
  Lower 
  

   California 
  (type, 
  Pilsbry) 
  ; 
  San 
  Diego, 
  California, 
  to 
  San 
  Ignacio 
  Lagoon, 
  Lower 
  Cali- 
  

   fornia 
  (Dall) 
  

  

  It 
  is 
  not 
  correct, 
  as 
  in 
  A. 
  Smith 
  (1955, 
  p. 
  12) 
  to 
  use 
  the 
  species 
  as 
  of 
  Pilsbry 
  with 
  the 
  

   type 
  locality 
  of 
  Dall. 
  If 
  the 
  authorship 
  is 
  of 
  Pilsbry 
  the 
  type 
  locality 
  is 
  Pt. 
  Abreojos, 
  Lower 
  

   California. 
  The 
  type 
  locality 
  of 
  Todos 
  Santos 
  Bay 
  applies 
  only 
  if 
  Dall 
  is 
  used 
  as 
  the 
  author. 
  

  

  Family 
  Ischnochitonidae 
  

   Genus 
  Ischnochiton 
  (iray, 
  1847 
  

  

  Ischnochiton 
  Gray, 
  1847, 
  Zool. 
  Soc. 
  London, 
  Proc, 
  p. 
  126 
  

  

  Type 
  species 
  by 
  subsequent 
  designation, 
  Gray, 
  1847, 
  Zool. 
  Soc. 
  London, 
  Proc, 
  p. 
  168, 
  

  

  