﻿INTRODUCTION 
  

  

  PURPOSE 
  

  

  Those 
  who 
  are 
  familiar 
  \\ith 
  the 
  marine 
  molhiscan 
  fauna 
  of 
  the 
  West 
  Coast 
  

   do 
  not 
  need 
  an 
  explanation 
  for 
  placing 
  on 
  record, 
  for 
  the 
  first 
  time 
  in 
  most 
  cases, 
  

   the 
  figures 
  of 
  Carpenter's 
  types. 
  For 
  the 
  benefit 
  of 
  those 
  less 
  well 
  acquainted, 
  the 
  

   following 
  facts 
  may 
  give 
  a 
  brief 
  resume 
  of 
  the 
  problem 
  involved. 
  

  

  The 
  area 
  of 
  the 
  species 
  under 
  discussion 
  is 
  confined 
  to 
  the 
  West 
  Coast 
  of 
  the 
  

   United 
  States 
  from 
  San 
  Diego 
  northward. 
  It 
  is 
  the 
  province 
  covered 
  by 
  Dall 
  in 
  

   U. 
  S. 
  National 
  Museum 
  Bulletin 
  (1921) 
  No. 
  112 
  and 
  that 
  of 
  the 
  lists 
  appearing 
  

   in 
  the 
  Minutes 
  of 
  the 
  Conchological 
  Club 
  of 
  Southern 
  California. 
  Those 
  lists 
  

   make 
  a 
  convenient 
  accompanying 
  guide. 
  Such 
  a 
  unit 
  excludes 
  those 
  species 
  de- 
  

   scribed 
  b}' 
  Carpenter 
  from 
  south 
  of 
  San 
  Diego, 
  except 
  where 
  they 
  range 
  into 
  the 
  

   northern 
  province. 
  The 
  southern 
  areas 
  from 
  Panama 
  north 
  deserve 
  a 
  separate 
  

   publication 
  or 
  publications. 
  Illustrations 
  and 
  data 
  have 
  been 
  accumulated 
  with 
  

   this 
  in 
  mind. 
  Carpenter's 
  IMazatlan 
  Catalogue 
  (1857) 
  is 
  a 
  work 
  unto 
  itself 
  and 
  

   would 
  be 
  best 
  illustrated 
  with 
  a 
  series 
  of 
  plates 
  to 
  accompany 
  the 
  already 
  printed 
  

   text. 
  The 
  types 
  of 
  the 
  species 
  described 
  in 
  that 
  catalogue 
  are 
  in 
  the 
  British 
  Mu- 
  

   seum 
  (Natural 
  History). 
  Because 
  of 
  the 
  magnitude 
  of 
  the 
  problem 
  it 
  appeared 
  

   proper 
  to 
  limit 
  the 
  area 
  involved 
  so 
  that 
  the 
  major 
  portion 
  of 
  the 
  whole 
  project 
  

   could 
  be 
  completed 
  in 
  a 
  reasonable 
  length 
  of 
  time. 
  

  

  Of 
  496 
  species 
  of 
  pelecypods 
  in 
  the 
  region 
  involved 
  (the 
  number 
  which 
  Dall 
  

   compiled 
  up 
  to 
  1921 
  in 
  Bulletin 
  112), 
  nearly 
  half 
  were 
  described 
  by 
  Dall. 
  Car- 
  

   penter 
  described 
  about 
  50 
  species 
  or 
  nearly 
  one-tenth 
  of 
  the 
  total 
  number. 
  Conrad 
  

   is 
  the 
  only 
  other 
  worker 
  who 
  described 
  a 
  number 
  (about 
  45^) 
  comparable 
  to 
  that 
  

   of 
  Carpenter. 
  DalP 
  is 
  the 
  author 
  of 
  about 
  half 
  of 
  the 
  specific 
  names 
  of 
  gastropods 
  

   which 
  he 
  recorded 
  from 
  the 
  same 
  area, 
  and 
  Bartsch 
  is 
  the 
  author 
  of 
  less 
  than 
  one- 
  

   fifth 
  of 
  the 
  same 
  number. 
  Carpenter 
  ranks 
  next 
  in 
  importance 
  with 
  about 
  176 
  

   species. 
  No 
  other 
  person 
  is 
  credited 
  with 
  authorship 
  of 
  more 
  than 
  40 
  species. 
  

  

  There 
  are 
  approximately 
  270 
  species 
  (including 
  those 
  of 
  Carpenter 
  and 
  

   others) 
  and 
  many 
  more 
  names 
  involved 
  in 
  the 
  present 
  study. 
  Only 
  4 
  of 
  the 
  50 
  

   pelecypod 
  species 
  described 
  by 
  Carpenter 
  have 
  had 
  the 
  types 
  figured, 
  and 
  some 
  

   of 
  these 
  figures 
  are 
  not 
  adequate. 
  Of 
  about 
  176 
  gastropod 
  species 
  concerned 
  prob- 
  

   ably 
  only 
  about 
  one-fifth 
  have 
  had 
  the 
  types 
  illustrated. 
  Because 
  of 
  the 
  extensive 
  

   monographic 
  work 
  of 
  Pilsbry 
  and 
  early 
  efiforts 
  of 
  Dall, 
  the 
  Amphineura 
  described 
  

   by 
  Carpenter, 
  either 
  published 
  or 
  in 
  manuscript, 
  have 
  been 
  generally 
  illustrated. 
  

   Further 
  discussion 
  in 
  regard 
  to 
  the 
  chitons 
  will 
  be 
  given 
  under 
  that 
  group. 
  

  

  The 
  conspicuous 
  lack 
  of 
  illustrations 
  of 
  the 
  Carpenter 
  types 
  has 
  been 
  a 
  

   stumbling 
  block 
  to 
  the 
  identification 
  and 
  interpretation 
  of 
  the 
  many 
  Carpenter 
  

   species. 
  Philip 
  Carpenter 
  described 
  more 
  than 
  500 
  new 
  species 
  and 
  published 
  

  

  1 
  Figures, 
  except 
  those 
  of 
  Carpenter, 
  derived 
  by 
  count 
  in 
  Bulletin 
  112. 
  

  

  2 
  Including 
  species 
  of 
  joint 
  authorship 
  with 
  I?artsch. 
  The 
  same 
  species 
  are 
  also 
  counted 
  

   under 
  Bartsch 
  authorship. 
  

  

  