﻿192 
  MARINE 
  MOLLUSCA 
  DliSCRlBED 
  BY 
  P. 
  P. 
  CARPENTER 
  

  

  whereas 
  0. 
  crenhnarginaia 
  lias 
  only 
  12. 
  If 
  the 
  two 
  forms 
  are 
  the 
  same 
  the 
  description 
  of 
  such 
  

   ribs 
  in 
  the 
  species 
  should 
  be 
  increased 
  to 
  include 
  the 
  larger 
  number. 
  

  

  Holotype. 
  — 
  Paleontological 
  Laboratory, 
  no. 
  4950, 
  Cornell 
  University, 
  Ithaca, 
  N. 
  Y. 
  

  

  Distribution. 
  — 
  Pliocene 
  — 
  Pleistocene, 
  Santa 
  Barbara 
  formation, 
  Santa 
  Barbara, 
  California 
  

   (type). 
  Recent. 
  O. 
  crcnimarginata 
  Dall, 
  Monterey?, 
  California, 
  to 
  Puerto 
  Libertad, 
  west 
  

   Mexico 
  (Dall, 
  modified 
  by 
  Willett 
  and 
  by 
  Strong) 
  

  

  Subgenus 
  Nodiscala 
  de 
  Boury, 
  1889 
  

  

  Nodiscala 
  DE 
  Boury, 
  1889, 
  Boll. 
  Soc. 
  Malacologica 
  Italiana, 
  vol. 
  XIV, 
  p. 
  168 
  

   Type 
  species 
  bv 
  original 
  designation, 
  Scalaria 
  bicarinata 
  Sovverry, 
  1844, 
  Zool. 
  Soc. 
  London, 
  

   Proc, 
  p. 
  30. 
  Living. 
  Philippines. 
  Tryon, 
  1887, 
  Man. 
  Conch., 
  vol. 
  IX, 
  pi. 
  17, 
  fig. 
  28 
  

  

  Opalia 
  (Nodiscala) 
  bullata 
  Carpenter 
  

  

  ^ 
  O. 
  (Nndi.smla) 
  stonpios-a 
  Cari)cntcr, 
  which 
  see 
  

  

  (PI. 
  22, 
  f^g. 
  6) 
  

  

  Opalia 
  bullata 
  Carpenter, 
  1864b, 
  p. 
  537, 
  660; 
  Reprint. 
  1872, 
  p. 
  23, 
  146; 
  1865, 
  Ann. 
  Mag. 
  

  

  Nat. 
  Hist., 
  ser. 
  3, 
  vol. 
  XV, 
  p. 
  397; 
  Reprint, 
  1872, 
  p. 
  287; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  Moll., 
  

  

  Geol. 
  Sur. 
  California, 
  p. 
  35; 
  Orcutt, 
  1915, 
  Moll. 
  World, 
  p. 
  38 
  

   Not 
  Scalaria 
  bullata 
  Sowerby, 
  1844. 
  Zool. 
  Soc. 
  I^ndon, 
  Proc, 
  p. 
  27; 
  1843, 
  Thes. 
  Conch., 
  

  

  vol. 
  I, 
  p. 
  94 
  bis, 
  pi. 
  XXXIV, 
  fig. 
  87. 
  Not 
  an 
  Opalia. 
  

   Scalaria 
  (Psychrosoma) 
  Crosscana 
  Tapparone-Canefri, 
  1876, 
  Jour, 
  de 
  Conchyl., 
  vol. 
  24, 
  

  

  p. 
  154; 
  Tryon, 
  1887, 
  Man. 
  Conch., 
  vol. 
  IX, 
  p. 
  84 
  Psychrosoma, 
  p. 
  50 
  = 
  Opalia. 
  

  

  "Shape 
  of 
  Rissoina: 
  with 
  sutural 
  bosses: 
  no 
  basal 
  rib." 
  [Carpenter, 
  1864b, 
  p. 
  660] 
  

  

  "O. 
  testa 
  minore, 
  alba, 
  subdiaphona, 
  turrita, 
  gracili 
  ; 
  marginibus 
  spirae 
  _ 
  subrectis 
  ; 
  tota 
  

   superficie 
  minutissime 
  et 
  creberrime 
  spiraliter 
  striolata 
  ; 
  vertice 
  nucleoso 
  declivi, 
  celato 
  ; 
  dein 
  

   anfr. 
  ii., 
  globosis, 
  radiatim 
  baud 
  sculptis 
  ; 
  dein 
  v. 
  normalibus, 
  pianatis, 
  suturis 
  vix 
  impressis 
  ; 
  

   lirulis 
  radiantihus 
  circ. 
  XXVI., 
  baud 
  nisi 
  in 
  anfr. 
  primis 
  c-xpressis, 
  circa 
  basim 
  irregulariter 
  

   rotundatam 
  ad 
  axim 
  continuis 
  ; 
  seric 
  bullularum 
  sutnralium 
  anfr, 
  primis 
  e 
  lirulis 
  extantibus 
  

   formata, 
  postea 
  lirulis 
  hand 
  convcnientibus, 
  anfr. 
  penult, 
  circ. 
  XVII., 
  pianatis, 
  super 
  suturas 
  

   parieti 
  appressis, 
  interstitiis 
  baud 
  infossis; 
  basi 
  subangulata, 
  baud 
  costata 
  ; 
  apertura 
  subovali, 
  

   sinistrosum 
  subplanata 
  ; 
  peritremate 
  continuo, 
  calloso; 
  labro 
  baud 
  sinuato. 
  Long. 
  .3, 
  long, 
  

   spin 
  .21, 
  lat. 
  .09, 
  div. 
  20°. 
  

  

  "Hab. 
  Sta. 
  Barbara, 
  one 
  specimen 
  (Jcwctt)." 
  [Carpenter, 
  1865i, 
  p. 
  397] 
  

  

  Carpenter 
  (1864b, 
  p. 
  660) 
  in 
  describing 
  "O. 
  retiporosa" 
  stated 
  that 
  the 
  shell 
  was 
  similar 
  

   to 
  O. 
  bullata 
  but 
  was 
  different 
  in 
  sculpture. 
  

  

  The 
  holotype 
  of 
  O. 
  bullata 
  is 
  in 
  much 
  better 
  condition 
  than 
  that 
  of 
  either 
  O. 
  retiporosa 
  

   or 
  O. 
  spongiosa. 
  It 
  resembles 
  the 
  holotype 
  of 
  O. 
  spongiosa 
  more 
  than 
  O. 
  retiporosa 
  in 
  the 
  

   less 
  angulated 
  whorls. 
  

  

  The 
  holotype 
  is 
  in 
  the 
  Redpatli 
  Museum. 
  It 
  is 
  mounted 
  on 
  glass 
  with 
  the 
  label, 
  "type 
  Sta. 
  

   Barbara 
  Jewett." 
  

  

  O. 
  spongiosa 
  has 
  priority 
  in 
  naming 
  (sec 
  under 
  that 
  name). 
  O. 
  bullata 
  is 
  not 
  preoc- 
  

   cupied 
  by 
  Scalaria 
  bullata 
  Sowerby, 
  as 
  thought 
  by 
  Tappanone 
  — 
  Cancfri, 
  because 
  Sowerby's 
  

   species 
  is 
  not 
  an 
  Opalia. 
  

  

  Holotype. 
  — 
  Redpath 
  Aluseum, 
  no. 
  76 
  

  

  Distribution. 
  — 
  Santa 
  Barbara, 
  California 
  (type) 
  

  

  Opalia 
  (Nodiscala) 
  spongiosa 
  Carpenter 
  

  

  The 
  holotypes 
  of 
  O. 
  spongiosa 
  and 
  O. 
  bullata 
  appear 
  to 
  represent 
  the 
  same 
  species. 
  O. 
  

   retiporosa 
  is 
  defined 
  by 
  a 
  holotype 
  which 
  has 
  the 
  whorls 
  more 
  angulated 
  than 
  the 
  holotyi>es 
  

   of 
  the 
  two 
  former 
  names. 
  O. 
  retiporosa 
  has 
  a 
  varix. 
  

  

  O. 
  retiporosa 
  has 
  been 
  placed 
  by 
  workers 
  (Dall, 
  1917; 
  Oldroyd, 
  1927; 
  Grant 
  and 
  Gale, 
  

   1931 
  ; 
  Durham, 
  1937, 
  Smith 
  and 
  Gordon, 
  1948) 
  in 
  Nodiscala. 
  From 
  a 
  brief 
  survey 
  of 
  species 
  

   identified 
  as 
  Dentiscala 
  and 
  Nodiscala^^ 
  and 
  a 
  comparison 
  of 
  the 
  type 
  species 
  one 
  w-onders 
  

   about 
  the 
  importance 
  of 
  separating 
  Dentiscala 
  and 
  Nodiscala. 
  Dentiscala 
  has 
  priority. 
  Until 
  

   examination 
  of 
  specimens 
  of 
  type 
  species 
  is 
  available 
  the 
  writer 
  retains 
  the 
  species 
  in 
  

   (Nodiscala). 
  

  

  88 
  See 
  Clench 
  and 
  Turner 
  (1950) 
  for 
  a 
  fine 
  series 
  of 
  pictures. 
  

  

  