﻿GASTROPODA 
  

  

  177 
  

  

  California, 
  p. 
  28; 
  1870, 
  Amer. 
  Jour. 
  Couch., 
  vol. 
  \'I, 
  p. 
  63; 
  Tryon, 
  1887, 
  Man. 
  Conch., 
  

   vol. 
  IX, 
  p. 
  153, 
  pi. 
  30, 
  fig. 
  8 
  

  

  Bittunn 
  quadrifilatnm 
  Carpenter, 
  Arnold, 
  1903, 
  p. 
  293 
  in 
  part, 
  pi. 
  IX, 
  fig. 
  2 
  

  

  Bittiuiit 
  (Scrinbittiutn) 
  attcuuatum 
  (Carpenter), 
  Bartsch. 
  1911, 
  U. 
  S. 
  Nat. 
  Miis., 
  Proc., 
  vol. 
  

   40, 
  no. 
  1826, 
  p. 
  393, 
  pi. 
  54, 
  figs. 
  1, 
  2, 
  5 
  tyi>es 
  ; 
  Dall, 
  1921, 
  p. 
  146; 
  Oldroyd, 
  1924, 
  Pub. 
  Pa- 
  

   get 
  Sound 
  Biol. 
  Station, 
  vol. 
  4, 
  p. 
  141 
  ; 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  21, 
  pi. 
  78, 
  figs. 
  1, 
  2, 
  5 
  same 
  

   as 
  Bartsch, 
  1911; 
  Grant 
  and 
  Gai.e, 
  1931, 
  p. 
  762; 
  Baily, 
  1935, 
  West 
  Coast 
  Shells, 
  

   (Keep), 
  p. 
  193; 
  Keen, 
  1937, 
  p. 
  30; 
  Burch, 
  1945, 
  no. 
  54, 
  p. 
  23, 
  30; 
  Woodring, 
  Bramlette, 
  

   and 
  Kew, 
  1946, 
  U. 
  S. 
  Geol. 
  Sur., 
  Prof. 
  Paper 
  207, 
  p. 
  67, 
  68; 
  Smith 
  and 
  Gordon, 
  1948, 
  

   California 
  Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XXVI, 
  p. 
  195 
  

  

  Bittium 
  filosum 
  ? 
  var. 
  csuricns 
  Carpenter, 
  1864b, 
  p. 
  537, 
  628, 
  655; 
  Rci)rint, 
  1872, 
  p. 
  23, 
  114, 
  

   141; 
  1865, 
  Ann. 
  Alag. 
  Nat. 
  Hist., 
  ser. 
  3, 
  vol. 
  XV, 
  p. 
  181; 
  Reprint, 
  1872, 
  p. 
  283; 
  1865, 
  

   Tour, 
  (le 
  Conchvl. 
  vol. 
  13, 
  p. 
  142; 
  Reprint, 
  1872, 
  p. 
  310; 
  Cooper. 
  1867, 
  Geog. 
  Cat. 
  Moll.. 
  

   Geol. 
  Sur. 
  California, 
  p. 
  2^ 
  Trvon, 
  1887, 
  Man. 
  Conch., 
  vol. 
  IX, 
  p. 
  153, 
  pi. 
  30, 
  fig. 
  16 
  

  

  Bittium 
  (Sfyliditiin) 
  attcnuatum 
  Carpenter, 
  Abbott, 
  1954, 
  p. 
  156 
  

  

  "Like 
  starved 
  filosum, 
  very 
  narrow, 
  adult 
  scarcely 
  sculptured." 
  [/>'. 
  var. 
  csuricns, 
  Carpen- 
  

   ter, 
  1864b, 
  p. 
  655] 
  

  

  "Like 
  plicatum, 
  A. 
  Ad., 
  or 
  drawn-out 
  csuricns, 
  with 
  threads 
  instead 
  of 
  grooves." 
  [Car- 
  

   penter, 
  1864b, 
  p. 
  655, 
  B. 
  attcnuatum] 
  

  

  Oldroyd 
  (1927) 
  republished 
  Carpenter's 
  description 
  (1865g) 
  of 
  B. 
  attcnuatum. 
  Correct 
  

   her 
  copy 
  as 
  follows 
  : 
  

  

  Last 
  line, 
  read 
  .31 
  for 
  31 
  ; 
  read 
  .11 
  for 
  11. 
  

   Add: 
  

  

  ". 
  . 
  . 
  div. 
  18°. 
  

  

  "Hab. 
  Monterey. 
  Taylor. 
  — 
  X^gpai, 
  gay^ 
  ^^jcra;;. 
  

  

  "Je 
  n'ai 
  vu 
  qu'un 
  seul 
  echantillon 
  en 
  bon 
  etat 
  de 
  cette 
  espece. 
  Elle 
  a 
  la 
  taille 
  du 
  B. 
  plica- 
  

   turn, 
  A. 
  Ad., 
  mais 
  la 
  sculpture 
  de 
  la 
  base 
  est 
  diflferente. 
  [Carpenter, 
  1865g, 
  p. 
  143, 
  B. 
  attemm- 
  

   tum] 
  

  

  "B. 
  t. 
  'B. 
  filoso' 
  simili, 
  sed 
  multo 
  minore. 
  graciliore, 
  interdum 
  valde 
  attenuata 
  ; 
  sculptura 
  t. 
  

   juniore 
  ut 
  in 
  'B. 
  filoso', 
  sed 
  t. 
  adulta 
  subobsoleta 
  ; 
  interstitiis 
  hand 
  insculptis. 
  Long. 
  .27, 
  long, 
  

   spir. 
  .19, 
  lat. 
  .085, 
  poll. 
  : 
  div. 
  25° 
  

  

  "Hah. 
  Neeah 
  Bay, 
  Sivan 
  Sta. 
  Barbara, 
  Jczvett. 
  — 
  Monterey, 
  San 
  Pedro, 
  Cooper. 
  

  

  "Bien 
  que 
  j'ai 
  vu 
  beaucoup 
  d'individus 
  de 
  cette 
  forme, 
  et 
  un 
  plus 
  grand 
  nombre 
  encore 
  du 
  

   B. 
  filosum, 
  Gld. 
  (= 
  Turritclla 
  Esclirichti, 
  Midd. 
  =r 
  Acirsa 
  Eschrichti, 
  Adams, 
  Genera), 
  je 
  

   ne 
  puis 
  decider 
  avec 
  une 
  certitude 
  complete 
  si 
  c'est 
  une 
  veritable 
  espece, 
  ou 
  seulement 
  une 
  

   variete 
  degradee 
  et. 
  pour 
  ainsi 
  dire, 
  affamee 
  (csuricns) 
  du 
  B. 
  filosum, 
  qui 
  d'ailleurs. 
  ne 
  varie 
  

   pas. 
  Comme 
  le 
  B. 
  filosum, 
  qui. 
  d'ailleurs. 
  ne 
  s'ctend 
  pas 
  aussi 
  loin 
  au 
  sud. 
  il 
  est 
  probable 
  que 
  

   les 
  echantillons 
  californiens 
  doivent 
  etre 
  consideres 
  comme 
  distincts. 
  tandis 
  que 
  les 
  individus 
  

   de 
  la 
  region 
  Vancouverienne 
  pcuvent 
  etre 
  reunis 
  au 
  B. 
  filosum. 
  Tous 
  les 
  individus 
  qu'on 
  a 
  

   envoyes 
  etaient 
  tres 
  — 
  roules." 
  [Carpenter, 
  1865g, 
  p. 
  142, 
  B. 
  (? 
  var.) 
  csuricns] 
  

  

  Bartsch 
  presented 
  a 
  detailed 
  description 
  and 
  figured 
  the 
  syntyi>es 
  of 
  B. 
  attcnuatum, 
  as 
  well 
  

   as 
  the 
  holotype 
  of 
  B. 
  csuricns 
  Carpenter, 
  which 
  he 
  regarded 
  as 
  a 
  young 
  individual 
  of 
  B. 
  

   attcnuatum. 
  This 
  opinion 
  appears 
  reasonable 
  from 
  the 
  illustrations. 
  The 
  writer 
  includes 
  orig- 
  

   inal 
  descriptions 
  for 
  completeness. 
  

  

  Dimensions. 
  — 
  Length 
  10.2 
  mm., 
  8.8 
  mm. 
  ; 
  diameter 
  3 
  mm., 
  2.9 
  mm. 
  respectively 
  (syntypes, 
  

   B. 
  attcnuatum^. 
  

  

  Types. 
  — 
  U. 
  S. 
  National 
  Museum, 
  syntypes. 
  B. 
  attcnuatum, 
  no. 
  15584; 
  holotype, 
  B. 
  csur- 
  

   icns, 
  no. 
  14832. 
  Lectotype. 
  no. 
  15584 
  (Bartsch, 
  1911. 
  pi. 
  54, 
  fig. 
  5; 
  selected 
  by 
  Woodring 
  in 
  

   Woodring, 
  Bramlette, 
  and 
  Kew, 
  1946, 
  p. 
  68) 
  

  

  Distribution. 
  — 
  Recent. 
  Monterey, 
  California; 
  Neah 
  Bay, 
  Washington 
  (type 
  localities). 
  

   The 
  syntypes 
  from 
  different 
  localities 
  have 
  been 
  deposited 
  together 
  without 
  locality 
  differ- 
  

   entiation. 
  Therefore, 
  even 
  if 
  one 
  of 
  the 
  two 
  specimens 
  were 
  chosen 
  as 
  lectotype. 
  the 
  proper 
  

   locality 
  cannot 
  be 
  attached. 
  Forrester 
  Island. 
  Alaska, 
  to 
  San 
  Diego. 
  California 
  (Dall). 
  Pleis- 
  

   tocene. 
  California 
  (Bartsch, 
  Oldroyd, 
  1925; 
  Grant 
  and 
  Gale; 
  Woodring, 
  Bramlette, 
  and 
  

   Kew 
  ) 
  

  

  Bittium 
  (Semibittium) 
  purpureum 
  (Carpenter) 
  

   Cerithiopsis 
  purpurea 
  Carpenter, 
  1864. 
  p. 
  537, 
  660; 
  Reprint, 
  1872, 
  p. 
  23. 
  146; 
  1865. 
  Ann. 
  

   Mag. 
  Nat. 
  Hist., 
  ser. 
  3, 
  vol. 
  XV, 
  p. 
  397; 
  Reprint, 
  1872, 
  p. 
  287; 
  Tryon, 
  1887, 
  Man 
  Conch., 
  

   vol. 
  IX, 
  p. 
  171, 
  pi. 
  35, 
  fig. 
  43; 
  WiLLiA^rsoN, 
  1892, 
  U. 
  S. 
  Nat. 
  AIus., 
  Proc, 
  vol. 
  XV, 
  no. 
  

   898, 
  p. 
  210 
  

  

  