﻿GASTROPODA 
  

  

  221 
  

  

  Gibbcrul'ma 
  pyrijormis. 
  C. 
  suhlriyona 
  has 
  the 
  aperture 
  shortened 
  posteriorly, 
  so 
  that 
  the 
  

   species 
  does 
  not 
  seem 
  to 
  belong 
  with 
  C. 
  jcwetti 
  and 
  C. 
  rcgularls. 
  Tentatively 
  the 
  species 
  is 
  

   left 
  in 
  the 
  genus 
  Cystiscus. 
  C. 
  snbtrigona 
  has 
  denticulations 
  on 
  the 
  outer 
  lip, 
  as 
  in 
  G. 
  pyri- 
  

   formis, 
  but 
  it 
  represents 
  an 
  extreme 
  from 
  G. 
  pyrijormis 
  in 
  the 
  posterior 
  character 
  of 
  the 
  

   aperture. 
  

  

  Cystiscus 
  jewettii 
  (Carpenter) 
  

   (PI. 
  24, 
  figs. 
  19-21 
  ; 
  PI. 
  26, 
  figs. 
  1, 
  2) 
  

  

  MargincUa 
  Jcivetti 
  Carpenter 
  in 
  Gould 
  and 
  Carpenter, 
  1856, 
  Zool. 
  Soc. 
  London, 
  Proc., 
  

   p. 
  207 
  ; 
  1857, 
  Rept. 
  Brit. 
  Assoc. 
  Adv. 
  Sci. 
  for 
  1856, 
  p. 
  228, 
  339, 
  349 
  ; 
  1860, 
  Smith. 
  Misc. 
  

   Coll., 
  vol. 
  6, 
  art. 
  6, 
  p. 
  4; 
  1864b, 
  p. 
  537, 
  661 
  ; 
  Reprint, 
  1872, 
  p. 
  23, 
  147; 
  Reeve, 
  1865, 
  Icon. 
  

   Conch., 
  vol. 
  15, 
  MargincUa, 
  not 
  pi. 
  XXVI 
  fig. 
  146; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  Moll., 
  

   Geol. 
  Sur. 
  California, 
  p. 
  36; 
  1870, 
  Amer. 
  Jour. 
  Conch., 
  vol. 
  VI, 
  p. 
  68; 
  Tryon, 
  1883, 
  

   Man. 
  Conch., 
  vol. 
  V, 
  p. 
  43, 
  not 
  pi. 
  12, 
  fig. 
  57 
  copy 
  Ree\^; 
  Keep, 
  1887, 
  West 
  Coast 
  Shells, 
  

   p. 
  43, 
  cf. 
  fig. 
  23 
  ; 
  Cooper, 
  1888, 
  7th 
  Ann. 
  Rept. 
  California 
  State 
  Min., 
  p. 
  249 
  ; 
  Williamson, 
  

   1892, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  15, 
  no. 
  898, 
  p. 
  212, 
  pi. 
  XIX, 
  fig. 
  6; 
  Arnold, 
  1903, 
  p. 
  

   221; 
  Tomlin, 
  1917, 
  Malacol. 
  Soc. 
  London, 
  Proc, 
  vol. 
  12, 
  p. 
  273; 
  Ball, 
  1921, 
  p. 
  85; 
  

   Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  I, 
  p. 
  164; 
  Baily, 
  1935, 
  West 
  Coast 
  Shells 
  (Keep), 
  p. 
  222, 
  

   fig. 
  212 
  same 
  as 
  Williamson; 
  Keen, 
  1937, 
  p. 
  39; 
  Smith 
  and 
  Gordon, 
  1948, 
  California 
  

   Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XXVI, 
  p. 
  185 
  

  

  Hyalina 
  (Cystiscus) 
  jezvettii 
  (Carpenter), 
  Grant 
  and 
  Gale, 
  1931, 
  p. 
  630, 
  pi. 
  24, 
  fig. 
  17 
  

   var. 
  nanella 
  Oldroyd, 
  see 
  for 
  additional 
  references 
  

  

  Cxstiscus 
  jcivctti 
  (Carpenter), 
  Burch, 
  1945, 
  no. 
  49, 
  p. 
  24, 
  26 
  

  

  Hyalina 
  jciuettii 
  (Carpenter), 
  Woodring, 
  Bramlette, 
  and 
  Kew, 
  1946, 
  U. 
  S. 
  Geol. 
  Sur., 
  

   " 
  Prof. 
  Paper 
  207, 
  p. 
  77 
  

  

  Pcrsicula 
  (Gibbentla) 
  jcwetti 
  (Carpenter), 
  Abbott, 
  1954, 
  p. 
  258 
  

  

  ". 
  . 
  . 
  Cpr. 
  P.Z.S. 
  1856, 
  p. 
  207. 
  Like 
  the 
  Mogador 
  species, 
  somewhat 
  shorter 
  and 
  broader. 
  

   10-20 
  fm. 
  Cp." 
  [Carpenter, 
  1864b, 
  p. 
  661] 
  

  

  A 
  copy 
  of 
  the 
  original 
  description 
  with 
  translation 
  was 
  published 
  by 
  Oldroyd 
  (1927). 
  

   In 
  the 
  first 
  line 
  of 
  that 
  copy 
  the 
  word 
  "sutura" 
  should 
  be 
  inserted 
  before 
  the 
  word 
  "celata." 
  

   The 
  following 
  should 
  be 
  added 
  to 
  make 
  the 
  copy 
  of 
  the 
  original 
  notes 
  complete: 
  

  

  ". 
  . 
  . 
  div. 
  120°. 
  

  

  "Hab. 
  Sta. 
  Barbara, 
  rarissime 
  {Col. 
  Jezvett). 
  Mus. 
  Gould. 
  

  

  "Closely 
  resembling 
  the 
  small 
  white 
  species 
  from 
  the 
  Panama, 
  W. 
  Indian 
  and 
  N. 
  African 
  

   provinces 
  ; 
  but 
  distinguished 
  from 
  all 
  in 
  shape 
  and 
  plications." 
  [Carpenter, 
  1856d, 
  p. 
  207] 
  

  

  In 
  the 
  Redpath 
  Museum, 
  there 
  are 
  10 
  specimens 
  of 
  this 
  species 
  in 
  the 
  Carpenter 
  Collec- 
  

   tion 
  mounted 
  on 
  glass 
  and 
  labelled 
  by 
  Carpenter 
  as 
  "Gibberula 
  Jewettii 
  Cpr. 
  type 
  Sta. 
  

   Barbara 
  Jewett." 
  These 
  are 
  the 
  only 
  specimens 
  found 
  so 
  far 
  which 
  have 
  been 
  definitely 
  

   labelled 
  by 
  Carpenter 
  with 
  the 
  data 
  corresponding 
  with 
  that 
  of 
  the 
  original 
  description. 
  

  

  At 
  the 
  New 
  York 
  State 
  Museum 
  in 
  the 
  Gould 
  Collection, 
  A4268, 
  there 
  is 
  a 
  shell 
  which 
  

   William 
  Marshall, 
  when 
  arranging 
  the 
  collection, 
  felt 
  might 
  be 
  the 
  type 
  of 
  this 
  species. 
  The 
  

   label 
  with 
  the 
  specimen 
  reads 
  "Sta. 
  Barbara 
  No. 
  30 
  very 
  rare 
  Marginella 
  new" 
  with 
  nota- 
  

   tion 
  "appears 
  like 
  Cooper's 
  handwriting." 
  Carpenter 
  records 
  in 
  his 
  original 
  description 
  that 
  

   a 
  specimen 
  was 
  in 
  the 
  Gould 
  Collection. 
  The 
  New 
  York 
  State 
  specimen 
  is 
  not 
  listed 
  in 
  the 
  

   catalogue 
  of 
  Gould 
  "types" 
  (27th 
  Ann. 
  Rept. 
  State 
  IMus. 
  Nat. 
  Hist., 
  1874, 
  p. 
  47), 
  so 
  that 
  the 
  

   shell 
  was 
  not 
  regarded 
  as 
  a 
  "type" 
  when 
  it 
  was 
  turned 
  over 
  to 
  the 
  New 
  York 
  State 
  Aluseum. 
  

   The 
  writer 
  includes 
  a 
  photograph 
  of 
  the 
  specimen. 
  It 
  might 
  be 
  the 
  one 
  referred 
  to. 
  If 
  syn- 
  

   types 
  had 
  not 
  been 
  found, 
  it 
  would 
  be 
  available 
  for 
  neotype 
  designation. 
  

  

  Oldroyd 
  (1927) 
  stated 
  incorrectly 
  that 
  the 
  type 
  is 
  in 
  the 
  British 
  Museum, 
  and 
  Tomlin, 
  

   followed 
  by 
  Grant 
  and 
  Gale, 
  stated 
  erroneously 
  that 
  the 
  type 
  is 
  in 
  the 
  U. 
  S. 
  National 
  

   Museum. 
  

  

  The 
  illustration 
  in 
  Reeve 
  (copied 
  by 
  Tryon) 
  does 
  not 
  depict 
  C. 
  jczvetti. 
  The 
  figure 
  

   by 
  Williamson 
  (also 
  Baily, 
  1935, 
  fig. 
  212) 
  represents 
  a 
  typical 
  form. 
  

  

  Syntypcs. 
  — 
  Redpath 
  ^^luseum. 
  No. 
  80 
  

  

  Distribution.— 
  Recent. 
  Santa 
  Barbara, 
  California 
  (type) 
  ; 
  Monterey, 
  California, 
  to 
  San 
  

   Martin, 
  Lower 
  California 
  (Burch). 
  Pleistocene. 
  California 
  (Arnold; 
  Oldroyd; 
  Chaces 
  ; 
  

   Woodring, 
  Bramlette, 
  and 
  Kew) 
  ; 
  Mexico 
  (Jordan) 
  

  

  