﻿GASTROPODA 
  259 
  

  

  Williamia 
  peltoides 
  (Carpenter) 
  

   (PI. 
  25, 
  fig. 
  15, 
  16) 
  

  

  Nacella 
  peltoides 
  Carpenter, 
  1864b, 
  p. 
  545, 
  618; 
  Reprint, 
  1872, 
  p. 
  31, 
  104; 
  Carpenter, 
  1864, 
  

   Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  3, 
  vol. 
  XIII, 
  p. 
  474; 
  Reprint, 
  1872, 
  p. 
  213 
  

  

  Nacella 
  subspiralis 
  Carpenter, 
  1864. 
  See 
  synonymy 
  and 
  discussion 
  following. 
  

  

  Siphonaria 
  peltoides 
  (Carpenter), 
  Dall, 
  1870, 
  Amer. 
  Jour. 
  Conch., 
  vol. 
  VI, 
  p. 
  Z7 
  not 
  pi. 
  4, 
  

   11a, 
  b 
  = 
  W. 
  vernalis 
  (Dall), 
  1870 
  p. 
  37 
  in 
  part 
  

  

  Liriola 
  peltoides 
  (Carpenter), 
  Dall, 
  1878, 
  Jour, 
  de 
  Conchyl., 
  vol. 
  XXVI, 
  p. 
  70 
  in 
  part 
  

  

  Sipho>varia 
  (IVilliamia) 
  peltoides 
  (Carpenter), 
  Williamson, 
  1892, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  

   vol. 
  15, 
  no. 
  898, 
  p. 
  196 
  

  

  Williamia 
  peltoides 
  (Carpenter), 
  Dall, 
  1907, 
  Nautilus, 
  vol. 
  21, 
  no. 
  8, 
  p. 
  86; 
  1921, 
  p. 
  67, 
  

   pi. 
  15, 
  figs. 
  10, 
  12 
  not 
  type 
  as 
  stated 
  by 
  Dall; 
  Oldroyd, 
  1927, 
  vol. 
  II, 
  pt. 
  II, 
  p. 
  58, 
  pi. 
  2, 
  

   fig. 
  17 
  copy 
  of 
  Dall, 
  1921. 
  pi. 
  12; 
  Grant 
  and 
  Gale, 
  1931, 
  p. 
  463; 
  Baily, 
  1935, 
  West 
  

   Coast 
  Shells 
  (Keep), 
  p. 
  277; 
  Keen, 
  1937, 
  p. 
  50; 
  Smith, 
  Maxwell, 
  1944, 
  Panama 
  

   Marine 
  Shells, 
  p. 
  44; 
  Burch, 
  1945, 
  no. 
  48, 
  p. 
  16; 
  Smith 
  and 
  Gordon, 
  1948, 
  California 
  

   Acad. 
  Sci., 
  Proc, 
  ser. 
  4, 
  vol. 
  XXVI, 
  p. 
  182; 
  Hubendick, 
  1946, 
  Kungl. 
  Sv. 
  Vet. 
  Akade- 
  

   miens, 
  Handlingar, 
  ser. 
  3, 
  Bd. 
  23, 
  no. 
  5, 
  p. 
  72 
  

  

  "262. 
  [of 
  Mazatlan 
  Catalogue] 
  = 
  Nacella 
  peltoides, 
  n.s. 
  (described 
  from 
  Capt 
  St. 
  Lucas 
  

   specimens)." 
  [Carpenter. 
  1864b, 
  p. 
  545] 
  "15. 
  474. 
  [A.N.H. 
  vol. 
  XIII, 
  Sp. 
  Page.] 
  Nacella 
  

   peltoides 
  = 
  Nacella, 
  sp. 
  indet., 
  Maz. 
  Cat., 
  no. 
  262." 
  [Carpenter, 
  1864b, 
  p. 
  618] 
  

  

  Oldroyd 
  (1927) 
  republished 
  Carpenter's 
  description 
  (1864a). 
  The 
  following 
  line 
  should 
  

   be 
  added 
  to 
  make 
  that 
  copy 
  complete: 
  

  

  "= 
  Nacella, 
  sp. 
  ind., 
  Maz. 
  Cat. 
  no. 
  262, 
  p. 
  202." 
  

  

  Oldroyd, 
  followed 
  by 
  Grant 
  and 
  Gale, 
  stated 
  that 
  the 
  type 
  was 
  in 
  the 
  Liverpool 
  Aluseum 
  

   which 
  would 
  mean 
  that 
  the 
  shell 
  (no. 
  262) 
  of 
  the 
  Mazatlan 
  Catalogue 
  was 
  considered 
  the 
  

   type. 
  

  

  Carpenter 
  was 
  explicit 
  in 
  his 
  first 
  notes 
  (1864b, 
  p. 
  545) 
  that 
  the 
  species 
  was 
  "described 
  

   from 
  Cape 
  St. 
  Lucas 
  specimens." 
  

  

  The 
  syntypes 
  consist 
  of 
  two 
  specimens 
  in 
  the 
  U. 
  S. 
  National 
  Museum, 
  mounted 
  on 
  an 
  

   original 
  Carpenter 
  glass 
  mount 
  and 
  labelled 
  in 
  Carpenter's 
  handwriting, 
  "Cape 
  St. 
  Lucas 
  

   Xantus 
  M. 
  Cat. 
  262," 
  and 
  two 
  specimens 
  in 
  the 
  Redpath 
  Museum 
  marked 
  "type 
  Cape 
  San 
  

   Lucas." 
  

  

  The 
  two 
  specimens 
  in 
  the 
  U. 
  S. 
  National 
  Museum 
  measure: 
  length 
  4 
  mm.; 
  1.5 
  mm.; 
  

   greatest 
  diameter 
  3 
  mm. 
  ; 
  1 
  + 
  mm., 
  respectively. 
  The 
  Redpath 
  Museum 
  specimens 
  measure 
  : 
  

   4 
  mm. 
  by 
  3.5 
  mm. 
  by 
  2 
  mm. 
  ; 
  3 
  + 
  mm. 
  by 
  2.5 
  mm. 
  by 
  ? 
  respectively. 
  

  

  Regardless 
  of 
  a 
  note 
  with 
  the 
  Carpenter 
  types, 
  "fig'd 
  by 
  Dall." 
  one 
  cannot 
  believe 
  that 
  

   those 
  were 
  the 
  shells 
  which 
  Dall 
  illustrated. 
  Certainly 
  the 
  shell 
  that 
  he 
  figured 
  (1921, 
  pi. 
  15, 
  

   figs. 
  10, 
  12), 
  which 
  in 
  the 
  explanation 
  of 
  the 
  plate 
  (p. 
  216) 
  is 
  labelled 
  as 
  "type", 
  cannot 
  be 
  

   such 
  a 
  specimen. 
  Dall's 
  measurements 
  of 
  "long. 
  10 
  mm., 
  alt. 
  6.5 
  mm." 
  are 
  nearly 
  three 
  

   times 
  the 
  typical 
  measurements. 
  The 
  illustration 
  of 
  Williamia 
  labelled 
  peltoides 
  which 
  Dall 
  

   included 
  (1870, 
  p. 
  1. 
  4, 
  fig. 
  11a, 
  b) 
  could 
  not 
  be 
  of 
  the 
  Carpenter 
  type. 
  Dall 
  (1921) 
  indicated 
  

   that 
  the 
  specimen 
  was 
  W. 
  vernalis, 
  which 
  he 
  regarded 
  at 
  the 
  later 
  date 
  as 
  distinct 
  from 
  W. 
  

   peltoides. 
  

  

  The 
  syntypes 
  were 
  young 
  individuals. 
  The 
  measurements 
  which 
  the 
  writer 
  made 
  of 
  the 
  

   larger 
  of 
  the 
  two 
  approximate 
  those 
  of 
  Carpenter 
  (.14 
  by 
  25.3 
  mm. 
  = 
  3.54 
  mm. 
  long.; 
  .11 
  

   by 
  25.3 
  mm. 
  = 
  2.78 
  mm. 
  lat.). 
  The 
  writer, 
  therefore, 
  selects 
  the 
  larger 
  of 
  the 
  two 
  syntypes 
  

   as 
  the 
  lectotype 
  of 
  this 
  species. 
  The 
  illustration 
  is 
  reserved 
  for 
  a 
  later 
  report. 
  The 
  Redpath 
  

   paratypes 
  also 
  approach 
  the 
  typical 
  measurements. 
  A 
  figure 
  of 
  the 
  larger 
  of 
  the 
  two 
  speci- 
  

   mens 
  is 
  included 
  herein. 
  

  

  Dall 
  stated 
  (1870) 
  "after 
  a 
  careful 
  study 
  of 
  the 
  types," 
  that 
  Nacella 
  stibspiralis 
  Car- 
  

   penter 
  belonged 
  to 
  the 
  same 
  species 
  as 
  W. 
  peltoides 
  as 
  well 
  as 
  Nacella 
  ? 
  vernalis. 
  The 
  name 
  

   of 
  the 
  latter 
  was 
  given 
  in 
  manuscript 
  by 
  Dall 
  (1866), 
  but 
  he 
  later 
  (1878) 
  classified 
  it 
  as 
  a 
  

   variety 
  of 
  Liriola 
  peltoides. 
  He 
  later 
  separated 
  the 
  two 
  as 
  distinct 
  species 
  (1921). 
  

  

  The 
  paratypes 
  in 
  the 
  Redpath 
  Museum 
  are 
  thin-shelled. 
  They 
  have 
  a 
  few 
  faint 
  widely 
  

   separated 
  radiating 
  ridges. 
  The 
  tip 
  of 
  the 
  shell 
  is 
  white 
  and 
  the 
  remainder 
  brownish. 
  

  

  