﻿160 
  MARINE 
  MOLLUSCA 
  DESCRIBKD 
  BY 
  P. 
  P. 
  CARPENTER 
  

  

  about 
  fifteen 
  slender 
  spiral 
  threads 
  crossed 
  by 
  numerous 
  very 
  fine 
  axial 
  threads, 
  giving 
  the 
  

   surface 
  a 
  minutely 
  pitted 
  appearance, 
  while 
  in 
  Scrobs 
  the 
  nuclear 
  sculpture 
  is 
  in 
  the 
  form 
  of 
  

   numerous 
  very 
  fine 
  stippled 
  lines." 
  

  

  A. 
  tenuis 
  (Rartsch 
  (1911, 
  p. 
  264, 
  Fig. 
  3) 
  is 
  anotlicr 
  Californian 
  Recent 
  species 
  of 
  the 
  

   genus. 
  "A." 
  lacunatus 
  Carpenter 
  is 
  not 
  congeneric. 
  

  

  Amphithalamus 
  inclusus 
  Carpenter 
  

  

  Amfhithahmns 
  inclusus 
  Carpenter, 
  1864b, 
  p. 
  537, 
  614, 
  656; 
  Reprint, 
  1872, 
  p. 
  23, 
  100, 
  142; 
  

  

  1865, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  3, 
  vol. 
  XV, 
  ]>. 
  181; 
  Rei)rint, 
  1872, 
  p. 
  283; 
  Cooper, 
  1867, 
  

  

  Geog. 
  Cat. 
  Moll, 
  Gcol. 
  Sur. 
  California, 
  p. 
  30 
  Baktscii, 
  1911, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  

  

  41, 
  no. 
  1854, 
  p. 
  264. 
  fig. 
  2 
  Icctotvpc; 
  Dale. 
  1921, 
  p. 
  158; 
  Strong, 
  1923, 
  Nautilus, 
  vol. 
  

  

  XXXVII, 
  no. 
  2, 
  I). 
  43; 
  Oedrovd, 
  1927, 
  vol. 
  IT, 
  pt. 
  Ill, 
  p. 
  84; 
  Keen, 
  1937, 
  p. 
  29; 
  Bukcii, 
  

  

  1945. 
  no. 
  55. 
  p. 
  26 
  

   Rissoia 
  ijiclusa 
  (Carpenter), 
  Tkvon, 
  1887, 
  Man. 
  Conch., 
  vol. 
  IX, 
  p. 
  317, 
  340 
  section 
  

  

  Aitiphithalamus 
  

  

  "Habit 
  of 
  minute 
  Ncnmtura: 
  labrum 
  not 
  contracted, 
  but 
  labium 
  in 
  adult 
  travels 
  forward 
  

   to 
  meet 
  it, 
  leaving 
  a 
  cliamber 
  behind. 
  Nucleus 
  cancellated 
  : 
  base 
  bluntly 
  ribbed." 
  [Carpenter, 
  

   1864b, 
  p. 
  656] 
  

  

  Tlie 
  following 
  lines 
  should 
  be 
  changed 
  in 
  Oldroyd's 
  (1927) 
  copy 
  of 
  Carpenter's 
  description 
  

   (1866) 
  : 
  

  

  Delete 
  "poll." 
  

   Add: 
  

  

  ". 
  . 
  . 
  60» 
  

  

  "Hab. 
  Sta. 
  Barbara 
  (J 
  curt!) 
  ; 
  S. 
  Diego 
  (Cooper)." 
  

  

  "This 
  very 
  remarkable 
  little 
  shell 
  bears 
  the 
  same 
  relation 
  to 
  Rissoa 
  that 
  Stoastoina 
  does 
  to 
  

   Hclicina. 
  The 
  peritremc 
  resembles 
  a 
  figure 
  6 
  inverted, 
  as 
  on 
  the 
  face 
  of 
  the 
  type. 
  In 
  the 
  dis- 
  

   proportionate 
  size 
  of 
  the 
  nuclear 
  whorls 
  it 
  resembles 
  VitrincUa". 
  [Carpenter, 
  186Sh, 
  p. 
  181] 
  

  

  One 
  of 
  the 
  syntypes 
  [three 
  (Bartsch)] 
  is 
  in 
  the 
  original 
  Carpenter 
  vial 
  with 
  the 
  original 
  

   Carpenter 
  label 
  in 
  white 
  ink 
  on 
  glass, 
  "type 
  S. 
  Diego 
  Cooper." 
  Apparently 
  this 
  is 
  the 
  speci- 
  

   men 
  which 
  Bartsch 
  figured. 
  He 
  presented 
  a 
  full 
  description 
  of 
  the 
  shell. 
  

   Dimensions. 
  — 
  Length 
  1.4 
  mm.; 
  diameter 
  0.9 
  mm. 
  (Bartsch) 
  

   Syntypes.— 
  \3. 
  S. 
  National 
  Museum, 
  no. 
  15573; 
  lectotype, 
  no. 
  15573X 
  

  

  Distribution. 
  — 
  Recent. 
  San 
  Diego, 
  California 
  (type) 
  ; 
  San 
  Pedro 
  and 
  Catalina 
  Island, 
  

   California, 
  to 
  Gulf 
  of 
  California 
  (Burch) 
  ; 
  San 
  Martin 
  Island, 
  Mexico 
  (Baker, 
  1902). 
  

   Pleistocene 
  (Woodring, 
  Bramlette, 
  and 
  Kcw, 
  1946) 
  

  

  "Amphithalamus" 
  lacunatus 
  Carpenter 
  

   ? 
  Anipliithalainus 
  lacunatus 
  Carpenter, 
  1864b, 
  p. 
  613, 
  657; 
  Reprint, 
  1872, 
  p. 
  99, 
  143; 
  1866, 
  

  

  California 
  Acad. 
  Sci., 
  Proc, 
  vol. 
  Ill, 
  p. 
  218; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  Moll., 
  Geol. 
  Sur. 
  

  

  California, 
  p. 
  30; 
  Bartsch, 
  1911, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  41, 
  no. 
  1854, 
  p. 
  263, 
  fig. 
  1 
  

  

  type; 
  Dall, 
  1921, 
  p. 
  158; 
  Oedroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  85; 
  Keen, 
  1937, 
  p. 
  29; 
  Burch, 
  

  

  1945, 
  no. 
  55, 
  p. 
  26 
  

   Rissoia 
  lacunata 
  (Carpenter), 
  Tuvox, 
  1887, 
  Man. 
  Condi., 
  vol. 
  IX, 
  p. 
  340 
  

  

  "Same 
  nucleus 
  [as 
  A. 
  inclusus] 
  : 
  base 
  chinked, 
  not 
  keeled. 
  (Adult 
  not 
  found.)" 
  [Carpenter, 
  

   1864b, 
  p. 
  657] 
  

  

  The 
  following 
  lines 
  should 
  be 
  added 
  to 
  tlic 
  coi)y 
  of 
  Carpenter's 
  descrii>tion 
  (1866) 
  as 
  

   published 
  by 
  Oldroyd 
  (l')27) 
  : 
  

  

  '\ 
  . 
  . 
  div. 
  50°. 
  

  

  "Hab. 
  San 
  Pedro. 
  Cooper. 
  

  

  "Two 
  dead 
  specimens 
  in 
  the 
  shell-washings 
  of 
  Dr. 
  Palmer's 
  consignment 
  to 
  the 
  Smith- 
  

   sonian 
  Institute 
  might 
  have 
  been 
  passed 
  over 
  as 
  the 
  young 
  of 
  Barleeia 
  subtcmiis. 
  but 
  for 
  the 
  

   possession 
  of 
  exactly 
  the 
  .same 
  remarkable 
  nucleus 
  as 
  A. 
  inclusus. 
  It 
  is 
  presumed, 
  therefore, 
  

   that 
  they 
  are 
  congeneric; 
  if 
  so, 
  the 
  adult 
  has 
  not 
  been 
  seen." 
  [Carpenter, 
  1866a, 
  p. 
  218] 
  

  

  The 
  holotype 
  is 
  preserved 
  in 
  the 
  original 
  Carpenter 
  vial, 
  on 
  the 
  glass 
  with 
  a 
  label 
  in 
  

   Carpenter's 
  handwriting, 
  "type 
  Calif. 
  Cooper." 
  

  

  Bartsch 
  figured 
  the 
  holotype 
  and 
  described 
  the 
  slull 
  characters 
  in 
  detail. 
  

  

  