﻿fiASTROrODA 
  239 
  

  

  There 
  is 
  a 
  large 
  columellar 
  fold 
  on 
  the 
  syntypes. 
  The 
  smaller 
  shell 
  is 
  worn, 
  but 
  the 
  larger 
  

   specimens 
  show 
  the 
  dark 
  and 
  white 
  bands 
  plainly. 
  The 
  writer 
  chooses 
  the 
  larger 
  of 
  the 
  

   two 
  individuals 
  to 
  be 
  the 
  lectotype 
  which 
  is 
  probably 
  the 
  one 
  figured 
  by 
  Dall 
  (1871). 
  The 
  

   writer 
  makes 
  this 
  selection 
  in 
  spite 
  of 
  the 
  discrepancy 
  in 
  measurements, 
  because 
  the 
  two 
  

   U. 
  S. 
  National 
  Museum 
  shells 
  are 
  the 
  only 
  one 
  which 
  have 
  been 
  found 
  with 
  any 
  indication 
  

   as 
  to 
  type 
  label. 
  The 
  small 
  shell 
  that 
  Carpenter 
  measured 
  (1865) 
  apparently 
  has 
  been 
  lost, 
  

   and 
  the 
  two 
  specimens 
  now 
  found 
  are 
  syntypic. 
  If 
  Carpenter 
  handled 
  these 
  syntypes, 
  which 
  

   correspond 
  in 
  size 
  to 
  the 
  dimensions 
  of 
  the 
  shells 
  which 
  are 
  usually 
  identified 
  as 
  this 
  species, 
  

   it 
  is 
  strange 
  that 
  he 
  chose 
  such 
  a 
  small 
  shell 
  for 
  representative 
  size 
  (.2 
  x 
  25.3 
  = 
  5.06 
  mm. 
  

   long.; 
  .09 
  x 
  25.3 
  = 
  2.27 
  mm. 
  lat.). 
  Carpenter's 
  measurements 
  are 
  puzzling. 
  Grant 
  and 
  Gale 
  

   (1931, 
  p. 
  443), 
  as 
  well 
  as 
  Burcli 
  (no. 
  47, 
  p. 
  9), 
  commented 
  on 
  the 
  relatively 
  large 
  size 
  of 
  

   the 
  species 
  as 
  identified 
  in 
  contrast 
  to 
  the 
  original 
  dimensions. 
  The 
  choosing 
  of 
  the 
  lectotype 
  

   presents 
  a 
  more 
  logical 
  measurement 
  basis 
  of 
  identification. 
  

  

  The 
  type 
  locality 
  is 
  San 
  Diego, 
  California. 
  The 
  only 
  possible 
  localities 
  whicii 
  would 
  

   qualify 
  as 
  type 
  locality 
  would 
  be, 
  "San 
  Diego," 
  "The 
  Islands" 
  ( 
  Farallones), 
  and 
  Santa 
  Cruz 
  

   (see 
  original 
  description). 
  Smith 
  and 
  Gordon 
  (1948) 
  indicated 
  that 
  Monterey 
  was 
  the 
  type 
  

   locality. 
  Monterey 
  was 
  not 
  included 
  by 
  Carpenter. 
  Dall 
  had 
  sectjndary 
  material 
  from 
  

   Monterey 
  which 
  he 
  listed 
  (1870). 
  

  

  Dimensions. 
  — 
  Lectotype: 
  length 
  10 
  mm.; 
  greatest 
  diameter 
  5 
  mm.; 
  paratype: 
  length 
  

   8 
  mm. 
  ; 
  greatest 
  diameter 
  4 
  mm. 
  

  

  Types. 
  — 
  Lectotype 
  and 
  paratype 
  (former 
  syntypes), 
  U. 
  S. 
  National 
  Museum, 
  no. 
  14914 
  

  

  Distribution. 
  — 
  Recent. 
  San 
  Diego, 
  California 
  (type) 
  ; 
  southeastern 
  Alaska, 
  to 
  Magdalena 
  

   Bay. 
  Mexico 
  (Burch). 
  Pleistocene. 
  California 
  (Arnold; 
  Oldroyd, 
  1925; 
  Grant 
  and 
  Gale; 
  

   Willett, 
  1937) 
  ; 
  Mexico 
  (Jordan, 
  1926) 
  

  

  Family 
  Atyidae 
  

   Genus 
  Atys 
  Montfort, 
  18101- 
  

  

  Atys 
  Montfort, 
  1810, 
  Conchyliol. 
  syst., 
  vol. 
  2, 
  p. 
  342-344 
  

  

  Type 
  species 
  by 
  original 
  designation, 
  Atvs 
  cvmbuhis 
  Montfort 
  — 
  Bulla 
  naucum 
  Lixxaeus, 
  

  

  1758, 
  Syst. 
  Nat., 
  p. 
  726. 
  Recent. 
  Indo-Pacific. 
  Pilsbry, 
  1893, 
  Man. 
  Conch., 
  vol. 
  XV, 
  pi. 
  

  

  28, 
  figs. 
  11-15 
  

  

  Subgenus 
  Aliculastrum 
  Pilsbry, 
  1896 
  

  

  Aliculastnim 
  Pilsbry, 
  1896, 
  Man. 
  Conch., 
  vol. 
  XVI, 
  p. 
  237 
  new 
  name 
  for 
  Alicula 
  Ehren- 
  

   BERG, 
  1831, 
  Symbolae 
  Phys. 
  decas. 
  1st., 
  p. 
  41 
  of 
  Mollusca 
  fide 
  Gardxer, 
  1937, 
  not 
  Alicula 
  

   EiCHWALD, 
  1830, 
  Natur. 
  Skizze 
  Lithauen 
  Volhynien 
  Podolien, 
  p. 
  214. 
  See 
  Neave, 
  1939- 
  

   1940 
  

  

  Type 
  species 
  by 
  monotypy. 
  Bulla 
  cxlindrica 
  Helblixg, 
  1779, 
  Abhandl. 
  Privat 
  Gesellsch. 
  

   Bohmen, 
  IV, 
  p. 
  122, 
  pi. 
  II, 
  figs. 
  30, 
  31 
  fide 
  Pilsbry 
  (1893). 
  Recent. 
  Indo-Pacific. 
  

   Pilsbry, 
  1893, 
  Man. 
  Conch., 
  vol. 
  XV, 
  pi. 
  22,, 
  figs. 
  60-64 
  

  

  Because 
  A. 
  casta 
  deviates 
  so 
  far 
  from 
  typical 
  Atys 
  the 
  writer 
  believes 
  that 
  a 
  better 
  idea 
  

   of 
  its 
  characters 
  is 
  intimated 
  by 
  its 
  grouping 
  under 
  the 
  subgenus 
  Aliculastrum. 
  B. 
  casta 
  is 
  

   more 
  typical 
  of 
  the 
  shell 
  characters 
  of 
  that 
  subgroup 
  than 
  are 
  fossil 
  species 
  in 
  the 
  lower 
  and 
  

   middle 
  Miocene 
  of 
  Jamaica 
  and 
  Florida, 
  which 
  have 
  been 
  so 
  classified 
  and 
  seem 
  to 
  bear 
  a 
  

   relationship 
  to 
  Aliculastrum 
  (Woodring, 
  1928, 
  p. 
  127; 
  Gardner, 
  1937, 
  p. 
  269) 
  

  

  Atys 
  (Aliculastrum) 
  casta 
  (Carpenter) 
  

   (PI. 
  27, 
  figs. 
  1-4) 
  

  

  ? 
  At\s 
  castra 
  Carpenter, 
  1864b. 
  p. 
  618; 
  Reprint, 
  1872, 
  p. 
  104; 
  1864, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  

  

  ser. 
  3, 
  vol. 
  XIII, 
  p. 
  314; 
  Reprint, 
  1872, 
  p. 
  212 
  

   Atys 
  casta 
  (Carpenter), 
  Pilsbry, 
  1893, 
  Man. 
  Conch., 
  vol. 
  XV, 
  p. 
  276; 
  Dall, 
  1921, 
  p. 
  62; 
  

  

  "Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  I, 
  p. 
  36; 
  ? 
  Tomlin, 
  1928, 
  Jour. 
  Conch., 
  vol. 
  XVIII, 
  p. 
  188; 
  

  

  Keen, 
  1937, 
  p. 
  30 
  

   Bidla 
  casta 
  (Carpenter), 
  Burch, 
  1945, 
  no. 
  47, 
  p. 
  29 
  

  

  "? 
  Atys 
  casta. 
  Rare: 
  allied 
  to 
  Cylichna." 
  [Carpenter, 
  1864b, 
  p. 
  618] 
  

  

  '^^^ 
  Atys 
  Montfort 
  would 
  equal 
  Bulla 
  Linnaeus, 
  1758, 
  type 
  species 
  by 
  absolute 
  tautonymy, 
  

   B. 
  naucum 
  Linnaeus 
  (1758) 
  except 
  for 
  the 
  action 
  of 
  Int. 
  Com. 
  Zool. 
  Nomen., 
  1950. 
  See 
  Bulla. 
  

  

  