﻿PELECYPODA 
  91 
  

  

  Lepton 
  meroeum 
  Carpenter 
  

   (PL 
  10, 
  figs. 
  12, 
  13) 
  

   Lepton 
  mcrocuin 
  Carpenter, 
  1864b, 
  p. 
  611, 
  643; 
  Reprint, 
  1872, 
  p. 
  97, 
  129; 
  1866, 
  Feb., 
  

   California 
  Acad. 
  Sci., 
  Proc, 
  vol. 
  Ill, 
  p. 
  210; 
  Cooper, 
  1867, 
  Geol. 
  Cat. 
  Moll., 
  Geol. 
  

   Sur. 
  California, 
  p. 
  9; 
  Dall, 
  1899, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  21, 
  p. 
  879; 
  1921, 
  p. 
  38; 
  

   Oldroyd, 
  1924b, 
  p. 
  137; 
  Keen, 
  1937, 
  p. 
  21; 
  Burch, 
  1944, 
  no. 
  40, 
  p. 
  19, 
  fig. 
  p. 
  12 
  holo- 
  

   type; 
  1945, 
  no. 
  45, 
  p. 
  13; 
  Schenck, 
  1945, 
  Jour. 
  Paleont, 
  vol. 
  19, 
  no. 
  5, 
  pi. 
  66, 
  fig. 
  8 
  

   holotype 
  

  

  "Lepton 
  meroeum, 
  n.s. 
  S. 
  Diego." 
  [Carpenter, 
  1864b, 
  p. 
  611] 
  

  

  "Lepton 
  meroeum, 
  n.s. 
  Small, 
  shaped 
  like 
  Siiiiapfa." 
  [Carpenter, 
  1864b, 
  p. 
  643] 
  

  

  "L. 
  t. 
  parva, 
  snbplanata, 
  Meroae-formi 
  ; 
  transversa, 
  marginibus 
  omnino 
  excurvatis 
  ; 
  

  

  antice 
  valde 
  producta 
  ; 
  umbonibus 
  acutis, 
  prominentibus 
  ; 
  dent. 
  card. 
  (V. 
  sinistr. 
  ) 
  uno, 
  

  

  celato 
  ; 
  lat. 
  ant. 
  prominente, 
  post, 
  subobsoleto 
  ; 
  fossa 
  cartilaginali 
  angusta 
  ; 
  cic. 
  adduct. 
  re- 
  

  

  motis. 
  

  

  "Long. 
  0.11, 
  lat. 
  0.08, 
  alt. 
  0.03. 
  

  

  "Hah. 
  San 
  Diego, 
  1 
  broken 
  valve 
  among 
  shell 
  washings. 
  Cooper." 
  [Carpenter, 
  1866a, 
  p. 
  

  

  210] 
  

  

  The 
  holotype 
  is 
  a 
  broken 
  specimen 
  in 
  the 
  U. 
  S. 
  National 
  Museum, 
  mounted 
  on 
  an 
  

   original 
  Carpenter 
  glass 
  and 
  bearing 
  a 
  label 
  in 
  his 
  handwriting, 
  "Type- 
  San 
  Diego 
  

   Cooper." 
  

  

  From 
  Carpenter's 
  original 
  description 
  quoted 
  above, 
  one 
  notes 
  that 
  the 
  holotype 
  was 
  

   broken 
  originally. 
  Additional 
  breakage 
  has 
  occurred 
  since 
  Carpenter. 
  

  

  Dall 
  overlooked 
  Carpenter's 
  original 
  description 
  (1866a). 
  This 
  was 
  unfortunate, 
  as 
  

   Oldroyd, 
  following 
  Dall, 
  missed 
  the 
  reference 
  also. 
  

  

  Because 
  the 
  holotype 
  is 
  in 
  bad 
  condition 
  good 
  illustrations 
  of 
  it 
  have 
  not 
  been 
  made. 
  

  

  Holotype. 
  — 
  U. 
  S. 
  National 
  Museum, 
  no. 
  15591 
  

  

  Distribution. 
  — 
  San 
  Diego, 
  California 
  (type) 
  ; 
  San 
  Pedro 
  to 
  San 
  Diego, 
  California 
  

   (Oldroyd) 
  ; 
  Puget 
  Sound, 
  Washington 
  (Keen, 
  1937) 
  

  

  Lasaea 
  subviridis 
  Dall 
  

  

  Lasaea 
  rubra 
  subviridis 
  "Carpenter," 
  Dall, 
  1899, 
  U. 
  S. 
  Nat. 
  Mus. 
  Proc, 
  vol. 
  21. 
  no. 
  1177, 
  

  

  p. 
  881, 
  Lower 
  California 
  

   Lasaea 
  subviridis 
  Dall, 
  Keen, 
  1938, 
  Malacol. 
  Soc. 
  London, 
  Proc, 
  vol. 
  23, 
  pt. 
  I, 
  p. 
  29, 
  30, 
  

  

  pi. 
  2, 
  figs. 
  1-6, 
  California 
  and 
  Lower 
  California 
  

  

  The 
  name 
  used 
  by 
  Dall 
  was 
  a 
  ms. 
  name 
  of 
  Carpenter 
  and 
  therefore 
  has 
  only 
  validity 
  

   as 
  of 
  Dall. 
  

  

  Family 
  Cardiidae 
  

   Genus 
  Nemocardium 
  Meek, 
  1876 
  

  

  Nemocardium 
  Meek, 
  1876, 
  U. 
  S. 
  Geol. 
  Sur. 
  Terr., 
  v. 
  9, 
  p. 
  167; 
  Keen, 
  1937, 
  Bull. 
  Musee 
  

  

  Roy. 
  d'Hist. 
  nat. 
  Belgique, 
  t. 
  XIII, 
  no. 
  7, 
  22 
  p. 
  

   Type 
  species 
  by 
  subsequent 
  designation, 
  Sacco, 
  1899, 
  I. 
  Aloll. 
  Liguria, 
  pt. 
  27, 
  p. 
  56, 
  Card- 
  

  

  ium 
  semiaspcrnm 
  Deshayes, 
  1860, 
  Desc. 
  An. 
  sans 
  Vert. 
  Basin, 
  Paris, 
  v. 
  1, 
  p. 
  573, 
  pi. 
  

  

  55, 
  figs. 
  1, 
  2. 
  Eocene. 
  Paris 
  Basin. 
  Cossmaxn 
  and 
  Pisarro, 
  1904, 
  Icon. 
  Coq. 
  Eoc. 
  Env. 
  

  

  Paris, 
  pi. 
  19, 
  figs. 
  72-7; 
  Deshayes, 
  1860, 
  Desc. 
  An. 
  sans 
  Vert. 
  Basin 
  Paris, 
  t. 
  1, 
  Atlas, 
  

  

  pi. 
  55, 
  figs. 
  1-2 
  

  

  For 
  discussion 
  of 
  the 
  range 
  of 
  the 
  genus, 
  see 
  Keen 
  (1950, 
  p. 
  23-29; 
  1954, 
  p. 
  10) 
  

  

  Subgenus 
  Keenaea 
  Habe, 
  1951 
  

   Keenaea 
  Habe, 
  1951, 
  Genera 
  of 
  Japanese 
  Shells 
  : 
  Pelecypoda, 
  no. 
  2, 
  p. 
  152 
  

  

  Type 
  species 
  by 
  original 
  designation, 
  Cardium 
  sainarangac 
  MAKIYA^[A, 
  1934, 
  Mem. 
  Coll. 
  

   Sci., 
  Kyoto 
  Univ., 
  ser. 
  B, 
  vol. 
  X, 
  no. 
  2, 
  p. 
  143 
  new 
  name 
  for 
  C. 
  modcstum 
  Adams 
  and 
  

   Reeve, 
  1850, 
  Zool. 
  "Samarang," 
  no. 
  7, 
  p. 
  77 
  not 
  C. 
  modestum 
  Philippi, 
  1948 
  [1849] 
  

   Zeitschrift 
  fiir 
  Malakozoologie, 
  p. 
  142, 
  Recent. 
  Japan. 
  Adams 
  and 
  Reeve, 
  1850, 
  Zool. 
  

   Samarang, 
  p. 
  77, 
  pi. 
  22, 
  fig. 
  6 
  

  

  Nemocardium 
  (Keenaea) 
  centifilosum 
  (Carpenter) 
  

  

  (PI. 
  10, 
  fig.s. 
  7-11) 
  

  

  Cardium 
  var. 
  centifilosum 
  Carpenter, 
  1864b, 
  p. 
  611, 
  642; 
  Reprint, 
  1872, 
  p. 
  97, 
  128; 
  1866, 
  

  

  