﻿PELECYPODA 
  

  

  85 
  

  

  Burch 
  (1944, 
  no. 
  39, 
  p. 
  22) 
  was 
  justified 
  in 
  being 
  puzzled 
  over 
  the 
  diflferences, 
  if 
  any, 
  be- 
  

   tween 
  A. 
  scrricata 
  and 
  A. 
  viridis. 
  Dall 
  distinguished 
  A. 
  viridis 
  as 
  "orbicular" 
  (1901b, 
  p. 
  791) 
  

   and 
  A. 
  serricata 
  as 
  "ovate." 
  However, 
  Carpenter 
  defined 
  A. 
  serricata 
  as 
  "circular," 
  which 
  

   would 
  confine 
  his 
  species 
  in 
  the 
  realm 
  of 
  what 
  Dall 
  later 
  called 
  A. 
  viridis. 
  The 
  lectotype 
  of 
  

   A. 
  serricata 
  has 
  about 
  the 
  same 
  height 
  as 
  length, 
  4.5 
  mm. 
  to 
  4 
  mm. 
  Specimens 
  in 
  collections 
  

   identified 
  as 
  both 
  or 
  either 
  species 
  have 
  the 
  oblique 
  form. 
  

  

  The 
  two 
  broken 
  specimens 
  in 
  the 
  Redpath 
  Museum 
  labelled 
  "type" 
  are 
  wliite, 
  smooth, 
  

   greenish, 
  and 
  lighter 
  in 
  the 
  center. 
  The 
  U. 
  S. 
  National 
  Museum 
  shell 
  marked 
  "type" 
  is 
  

   white 
  and 
  chalky. 
  Either 
  the 
  McGill 
  shells 
  represent 
  what 
  Dall 
  named 
  A. 
  viridis, 
  or 
  the 
  color 
  

   diflFerence 
  is 
  not 
  specific. 
  

  

  Lectotype.— 
  \]. 
  S. 
  National 
  Museum, 
  no. 
  5249 
  (Dall, 
  1901b, 
  pi. 
  XL, 
  fig. 
  2). 
  Three 
  speci- 
  

   mens 
  of 
  same 
  number, 
  including 
  the 
  lectotype, 
  are 
  labelled 
  "type" 
  in 
  the 
  U. 
  S. 
  National 
  Mu- 
  

   seum 
  ; 
  two 
  broken 
  specimens 
  labelled 
  "type" 
  are 
  in 
  the 
  Redpath 
  Museum. 
  

  

  Distribution.— 
  Puget 
  Sound, 
  Washington 
  (type). 
  Aleutian 
  Islands, 
  south 
  and 
  east 
  to 
  

   Puget 
  Sound, 
  Washington, 
  and 
  Catalina 
  Island, 
  California 
  (Dall) 
  

  

  Family 
  Dipi.odontidae 
  

  

  Genus 
  Taras 
  Risso, 
  1826 
  

  

  {Diplodonta 
  Bronn, 
  1831) 
  

  

  Taras 
  Risso, 
  1826, 
  Hist. 
  Nat. 
  Europ. 
  Merid., 
  vol. 
  4, 
  p. 
  344 
  

  

  Type 
  species 
  by 
  monotypy, 
  T. 
  antiquatus 
  Risso, 
  1826, 
  Hist. 
  Nat. 
  Europ. 
  Merid., 
  vol. 
  4, 
  fig. 
  

   167. 
  Pliocene-Pleistocene. 
  Trinite 
  

  

  Chavan 
  (1952, 
  p. 
  121) 
  discussed 
  the 
  Taras-Diplodonta 
  problem 
  in 
  detail 
  and 
  believed 
  that 
  

   the 
  type 
  species 
  of 
  Taras 
  should 
  be 
  rejected 
  as 
  a 
  noinen 
  diihium. 
  Such 
  a 
  decision 
  by 
  the 
  In- 
  

   ternational 
  Commission 
  on 
  Zoological 
  Nomenclature 
  would 
  restore 
  Diplodonta 
  to 
  usage. 
  

  

  Taras 
  subquadratus 
  (Carpenter) 
  

  

  Diplodonta 
  subquadrata 
  Carpenter, 
  1856, 
  Zool. 
  Soc. 
  London, 
  Proc, 
  1855, 
  pt. 
  XXIII, 
  p. 
  230; 
  

   Dall, 
  1921, 
  p. 
  34 
  

  

  Taras 
  subquadratus 
  (Carpenter), 
  Burch, 
  1944, 
  no. 
  39, 
  p. 
  24; 
  1944, 
  no. 
  41, 
  p. 
  20; 
  1945, 
  no. 
  

   45, 
  p. 
  12; 
  Hertlein 
  and 
  Strong, 
  1947, 
  Zoologica, 
  New 
  York 
  Zool. 
  Soc., 
  vol. 
  31, 
  pt. 
  4, 
  

   p. 
  130; 
  Durham, 
  1950, 
  Geol. 
  Soc. 
  Amer., 
  Mem. 
  43, 
  pt. 
  II, 
  p. 
  78, 
  pi. 
  19, 
  fig. 
  4, 
  14 
  

  

  This 
  species 
  was 
  described 
  from 
  Mazatlan, 
  and 
  although 
  the 
  write 
  up 
  was 
  not 
  in 
  the 
  Ma- 
  

   zatlan 
  Catalogue, 
  the 
  illustration 
  of 
  the 
  holotype 
  would 
  properly 
  belong 
  as 
  a 
  supplement 
  to 
  

   that 
  work. 
  Tlie 
  synonymy 
  is 
  not 
  meant 
  to 
  be 
  complete. 
  

  

  Dall 
  listed 
  the 
  species 
  from 
  Catalina 
  Island. 
  Burch 
  (1945) 
  gave 
  the 
  range 
  from 
  Santa 
  

   Monica, 
  California, 
  to 
  Panama, 
  but 
  Hertlein 
  and 
  Strong 
  limited 
  the 
  specific 
  range 
  to 
  San 
  

   Ignacio 
  Lagoon, 
  Lower 
  California, 
  to 
  Gorgona 
  Island, 
  Colombia, 
  and 
  the 
  Galapagos. 
  Dur- 
  

   ham 
  (1950) 
  reported 
  the 
  species 
  from 
  tlic 
  upper 
  Pliocene 
  and 
  Pleistocene 
  of 
  Lower 
  Calif6r- 
  

   nia. 
  

  

  Family 
  Lucixidae 
  

  

  Genus 
  Lucina 
  Bruguiere, 
  17973^' 
  

  

  Lucim 
  Bruguiere, 
  1797, 
  Encyl. 
  Method., 
  Tabl. 
  Vers, 
  pis. 
  284, 
  285, 
  286. 
  For 
  dates 
  see 
  Sher- 
  

  

  born 
  and 
  Woodward, 
  1906, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  7, 
  vol. 
  XVII, 
  p. 
  579 
  

   Type 
  species 
  by 
  subsequent 
  designation 
  by 
  Gray, 
  1847, 
  Zool. 
  Soc. 
  London, 
  Proc, 
  p. 
  195 
  : 
  

  

  Venus 
  jamaicensis 
  [Spengler] 
  Chemnitz, 
  1784, 
  Conch. 
  Cab., 
  vol. 
  7, 
  p. 
  24, 
  pi. 
  39, 
  figs. 
  

  

  408, 
  409. 
  Living. 
  West 
  Indies. 
  Reeve, 
  1850, 
  Conch. 
  Icon., 
  Lucina, 
  vol. 
  6, 
  pi. 
  II, 
  fig. 
  7a, 
  7b 
  

  

  Stewart 
  (1930) 
  and 
  Chavan 
  (1937) 
  presented 
  a 
  detailed 
  discussion 
  of 
  the 
  problem 
  of 
  the 
  

   nomenclature 
  of 
  Lucina. 
  Chavan 
  monographed 
  the 
  family 
  (1937-1938, 
  Vl 
  pts.). 
  He 
  used 
  

  

  33Bruguiere 
  names 
  which 
  would 
  otherwise 
  be 
  nomina 
  nnda 
  (see 
  Dodge, 
  1947a, 
  p. 
  487; 
  

   1947b, 
  p. 
  136; 
  1950, 
  p. 
  68) 
  are 
  validated 
  by 
  the 
  recommendation 
  of 
  the 
  Int. 
  Com. 
  Zool. 
  

   Nomen., 
  agreed 
  by 
  Int. 
  Cong. 
  Zool., 
  Paris, 
  1948, 
  that 
  generic 
  names 
  published 
  prior 
  to 
  Jan- 
  

   uary, 
  1931, 
  on 
  a 
  legend 
  of 
  plate 
  without 
  expianatorv 
  matter 
  is 
  to 
  be 
  treated 
  as 
  an 
  "indica- 
  

   tion." 
  (Bull. 
  Zool. 
  Nomen., 
  vol. 
  4, 
  pts. 
  10-12, 
  1950, 
  p. 
  255.) 
  

  

  