﻿PELECvronA 
  61 
  

  

  Nucula 
  exiqua 
  Sowerby 
  

   (PI. 
  1, 
  figs. 
  6, 
  7) 
  

  

  Nucula 
  exiqua 
  Sowerby, 
  1833, 
  Zool. 
  Soc. 
  London, 
  Proc. 
  1832, 
  pt. 
  2, 
  p. 
  198; 
  Grant 
  and 
  Gale. 
  

   1931, 
  p. 
  Ill 
  in 
  part; 
  Schenck, 
  1939, 
  Jour. 
  Paleont., 
  vol. 
  13, 
  no. 
  1, 
  p. 
  36, 
  pi. 
  6, 
  figs. 
  1-8, 
  

   11 
  figures 
  of 
  types 
  ;Hertlein 
  and 
  Strong, 
  1940, 
  Zoologica, 
  New 
  York 
  Zool. 
  Soc., 
  vol. 
  

   XXV, 
  pt. 
  4, 
  p. 
  381 
  for 
  synonymy, 
  pi. 
  1, 
  figs. 
  4, 
  5 
  

  

  Nucula 
  suprastriata 
  Carpenter, 
  ms. 
  type 
  U. 
  S. 
  Nat. 
  Museum, 
  No. 
  23247 
  nnmcn 
  nudum; 
  Red- 
  

   path 
  Museum, 
  no. 
  15373 
  

  

  Not 
  Nucula 
  suprastriata 
  Arnold, 
  1903, 
  p. 
  96, 
  pi. 
  XVIII, 
  fig. 
  6 
  

  

  Nucula 
  exiqua 
  suprastriata 
  Arnold, 
  Woodring, 
  Bramlette, 
  and 
  Kew, 
  1946, 
  U. 
  S. 
  Geol. 
  Sur., 
  

   Prof. 
  Paper 
  207, 
  p. 
  78 
  in 
  part 
  

  

  As 
  Grant 
  and 
  Gale 
  (1931) 
  and 
  Schenck 
  (1939) 
  determined, 
  Arnold 
  (1903) 
  must 
  be 
  

   credited 
  with 
  the 
  name 
  Nucula 
  suprastriata 
  and 
  not 
  Carpenter. 
  The 
  Pleistocene 
  specimen 
  

   figured 
  by 
  Arnold 
  is 
  the 
  holotype 
  (lost) 
  of 
  that 
  species. 
  

  

  There 
  is 
  a 
  manuscript 
  type, 
  no. 
  23247 
  in 
  the 
  U. 
  S. 
  Nat. 
  Museum, 
  of 
  N. 
  suprastriata 
  con- 
  

   sisting 
  of 
  two 
  specimens 
  labelled, 
  "Catalina 
  30 
  fms. 
  Cooper." 
  The 
  shells 
  are 
  opposite 
  valves 
  

   with 
  the 
  margins 
  broken. 
  The 
  smaller 
  and 
  more 
  complete 
  of 
  the 
  two 
  is 
  figured 
  herein. 
  The 
  

   photo 
  shows 
  the 
  amount 
  of 
  reticulation 
  in 
  the 
  sculpture. 
  On 
  the 
  larger 
  fragment 
  the 
  reticula- 
  

   tion 
  is 
  stronger 
  near 
  the 
  margin. 
  The 
  specimen 
  figured 
  falls 
  within 
  the 
  measurements 
  of 
  

   A'', 
  exiqua 
  Sowerby 
  as 
  enumerated 
  by 
  Schenck, 
  but 
  the 
  length 
  of 
  the 
  second 
  type 
  would 
  reach 
  

   at 
  least 
  6 
  mm. 
  There 
  are 
  in 
  the 
  Redpath 
  Aluseum 
  6 
  specimens 
  (including 
  both 
  valves), 
  no. 
  

   15373, 
  labelled 
  "Nucula 
  suprastriata 
  Catalina 
  Is. 
  30 
  fm. 
  Cooper 
  type," 
  in 
  Carpenter's 
  hand- 
  

   writing. 
  

  

  The 
  name 
  of 
  Carpenter 
  has 
  no 
  nomenclatural 
  status, 
  and 
  as 
  suggested 
  by 
  .Schenck 
  the 
  

   Recent 
  specimens 
  of 
  Carpenter 
  probably 
  belong 
  to 
  A'^. 
  exiqua 
  Sowerby.^ 
  

  

  Schenck 
  limited 
  N. 
  suprastriata 
  Arnold 
  to 
  the 
  Pleistocene 
  forms. 
  Woodring, 
  Bramlette, 
  

   and 
  Kew 
  suggested 
  that 
  the 
  California 
  Recent 
  and 
  Pleistocene 
  shells 
  be 
  separated 
  from 
  the 
  

   living 
  southern 
  N. 
  exiqua 
  as 
  a 
  subspecies. 
  

  

  The 
  figures 
  and 
  notes 
  of 
  the 
  original 
  specimens 
  of 
  "N. 
  suprastriata 
  Carpenter, 
  ms." 
  are 
  

   included, 
  because 
  the 
  name 
  has 
  been 
  brought 
  into 
  literature 
  by 
  authors 
  with 
  conjecture 
  as 
  to 
  

   its 
  proper 
  identity. 
  

  

  Family 
  Nuculanidae 
  (Ledidae) 
  

  

  Genus 
  Nuculana 
  Link, 
  1807 
  

  

  (Leda 
  Schumacher, 
  1817) 
  

  

  Nuculana 
  1.JNK, 
  1807, 
  Beschreib. 
  Nat.-Samml. 
  Univ. 
  Rostock, 
  p. 
  155 
  

  

  Type 
  species 
  by 
  monotypy, 
  N. 
  rostrata 
  (Gmelin), 
  1791, 
  Systenia 
  Naturae, 
  13th 
  ed., 
  p. 
  3308; 
  

  

  referred 
  also 
  to 
  Chemnitz, 
  lo 
  1784, 
  Neues 
  Syst. 
  Conchyl.-Cab., 
  Bd. 
  7, 
  p. 
  206, 
  tab. 
  55, 
  figs. 
  

  

  550, 
  551 
  = 
  Area 
  pernula 
  Muller, 
  1779, 
  Beschaft. 
  Berl. 
  Ges. 
  Naturf. 
  Freunde, 
  v. 
  4, 
  p. 
  57. 
  

  

  Recent. 
  Circumpolar. 
  Reeve, 
  1871, 
  Conch. 
  Icon., 
  Laeda, 
  vol. 
  18, 
  pi. 
  2, 
  fig. 
  5a-c; 
  Sars, 
  1878, 
  

  

  pi. 
  5, 
  figs. 
  1 
  a-d 
  exterior 
  and 
  interior 
  

  

  Subgenus 
  Thestyleda 
  Iredale, 
  1929 
  

  

  Thestyleda 
  Iredale, 
  1929, 
  Rec. 
  Australian 
  Mus., 
  vol. 
  17, 
  no. 
  4, 
  p. 
  158, 
  187 
  

  

  Type 
  species 
  by 
  original 
  designation, 
  Leda 
  ratnsayi 
  E. 
  A. 
  Smith, 
  1885, 
  Challenger 
  Rept., 
  

  

  Zool., 
  vol. 
  XIII, 
  p. 
  241, 
  pi. 
  XX, 
  figs. 
  3-3a. 
  Recent. 
  Off 
  Sydney, 
  New 
  South 
  Wales, 
  950 
  

  

  fathoms 
  

  

  Nuculana 
  (Thestyleda) 
  hamata 
  (Carpenter) 
  

   (PI. 
  2, 
  figs. 
  4-6) 
  

  

  Leda 
  hamata 
  Carpenter, 
  1864b, 
  p. 
  612, 
  644; 
  Reprint, 
  1872, 
  p. 
  98, 
  130; 
  1866, 
  Feb., 
  California 
  

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

  

  ^Type 
  locality, 
  "Bay 
  of 
  Caraccas," 
  [Ecuador]. 
  Carpenter, 
  (1857b, 
  p. 
  168), 
  located 
  the 
  

   Bay 
  of 
  Caraccas 
  in 
  Ecuador, 
  at 
  .5°S. 
  It 
  is 
  not 
  to 
  be 
  confused 
  with 
  Caracas, 
  Venezuela, 
  or 
  

   Curagao. 
  The 
  original 
  notes 
  of 
  Sowerby 
  stated, 
  "Hab. 
  ad 
  Columbiam 
  Occidentalem 
  (Bay 
  of 
  

   Caraccas)." 
  See 
  also 
  synonymy, 
  Hertlein 
  and 
  Strong, 
  1940, 
  p. 
  381. 
  

  

  ^''Chemnitz 
  did 
  not 
  use 
  rostrata 
  in 
  a 
  binomial 
  sense 
  but 
  referred 
  to 
  species 
  as 
  "Area 
  Mar- 
  

   tini 
  rostrata, 
  . 
  . 
  ." 
  which 
  does 
  not 
  allow 
  Chemnitz 
  authorship 
  of 
  the 
  species 
  Area 
  rostrata. 
  

   See 
  also 
  Opinion 
  184, 
  Int. 
  Com. 
  Zool. 
  Nomen., 
  vol. 
  3, 
  pt. 
  3, 
  1944. 
  

  

  