﻿GASTROPODA 
  

  

  159 
  

  

  Littorina 
  (Algamorda) 
  subrotundata 
  (Carpenter) 
  

   (PI. 
  18, 
  figs. 
  1, 
  2) 
  

  

  fAssiminca 
  subrotundata 
  Carpenter, 
  1864b, 
  p. 
  628, 
  656; 
  Reprint, 
  1872, 
  p. 
  114, 
  142; 
  1865, 
  Ann. 
  

  

  Mag. 
  Nat. 
  Hist., 
  ser. 
  3, 
  vol. 
  XV, 
  p. 
  429; 
  Reprint, 
  1872, 
  p. 
  241; 
  Cooper, 
  1867, 
  Geog. 
  Cat. 
  

  

  Moll., 
  Geol. 
  Sur. 
  California, 
  p. 
  29 
  

   Assinnnia 
  subrotundata 
  Carpenter, 
  Taylor, 
  1895, 
  Roy. 
  Soc. 
  Canada, 
  Trans., 
  ser. 
  2, 
  vol. 
  I, 
  

  

  sec. 
  IV, 
  p. 
  81 
  

   Littorina 
  {? 
  Alaamorda) 
  subrotundata 
  (Carpenter), 
  Dall, 
  1921, 
  p. 
  153; 
  Oldroyd, 
  1927, 
  

  

  vol. 
  II, 
  pt. 
  Ill, 
  p. 
  63; 
  BuRCH, 
  1945, 
  no. 
  55. 
  p. 
  13 
  

   Littorina 
  subrotunda 
  [Carpenter], 
  Keen, 
  1937, 
  p. 
  38 
  

  

  "Like 
  a 
  very 
  thin 
  Litorina: 
  ashen, 
  plain." 
  [Carpenter, 
  1864b, 
  p. 
  656] 
  

  

  Oldroyd 
  (1927) 
  published 
  a 
  copy 
  of 
  Carpenter's 
  description 
  (1865). 
  However, 
  the 
  meas- 
  

   urements 
  as 
  copied 
  by 
  her 
  should 
  be 
  corrected 
  as 
  follows 
  : 
  

  

  For 
  "28" 
  read 
  ".28" 
  for 
  13 
  read 
  ".13"; 
  for 
  2 
  read 
  .2; 
  delete 
  "poll." 
  

   The 
  following 
  lines 
  should 
  be 
  added 
  to 
  make 
  that 
  copy 
  complete 
  : 
  

  

  ". 
  . 
  . 
  div. 
  65°. 
  

  

  "Hab. 
  Neeah 
  Bay; 
  one 
  specimen 
  among 
  Lacunae 
  {Szvan'). 
  

  

  "May 
  prove 
  to 
  be 
  a 
  large 
  Hydrobia." 
  [Carpenter, 
  1865a, 
  p. 
  28] 
  

  

  The 
  holotype 
  is 
  broken 
  and 
  worn 
  (pi. 
  18, 
  figs. 
  1, 
  2). 
  The 
  spire 
  is 
  pointed 
  and 
  elevated. 
  

   Holotype. 
  — 
  U. 
  S. 
  National 
  Museum, 
  no. 
  15586 
  

   Distribution. 
  — 
  Neah 
  Bay, 
  Washington 
  (type) 
  

  

  Subgenus 
  Melarhaphe 
  Menke, 
  1828 
  

   (Mclaraplic 
  of 
  authors) 
  

  

  Melarhaphe 
  Menke, 
  1828, 
  Synopsis 
  Meth. 
  Moll., 
  p. 
  23; 
  fide 
  Bequaert, 
  1943, 
  Johnsonia, 
  

   [vol. 
  1], 
  no. 
  7, 
  p. 
  2 
  

  

  Type 
  species 
  by 
  monotypy, 
  M. 
  glabrata 
  — 
  Turbo 
  neritoides 
  Linnaeus, 
  1758, 
  Syst. 
  Nat., 
  

   ed. 
  X, 
  p. 
  761; 
  fide 
  Bequaert, 
  1943, 
  Johnsonia, 
  [vol. 
  1], 
  p. 
  2. 
  Recent. 
  Southern 
  Europe; 
  

   Madeira. 
  Maxwell 
  Smith, 
  1940, 
  World-wide 
  Sea 
  Shells, 
  p. 
  29, 
  fig. 
  409 
  

  

  Littorina 
  (Melarhaphe) 
  scutulata 
  pullata 
  Carpenter 
  

  

  Litorina 
  [sic] 
  pullata 
  Carpenter, 
  1864, 
  June, 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  3, 
  vol. 
  XIII, 
  p. 
  477; 
  

  

  Reprint, 
  1872, 
  p. 
  216; 
  1864b, 
  Aug.. 
  p. 
  546, 
  618; 
  Reprint. 
  1872. 
  p. 
  32, 
  104 
  

   Littorina 
  scutulata 
  Gould, 
  Trvon. 
  1887. 
  Man. 
  Conch., 
  vol. 
  IX, 
  p. 
  250 
  in 
  part, 
  pi. 
  45. 
  fig. 
  3 
  

   Littorina 
  (Mclaraphe) 
  pullata 
  Carpenter, 
  Baily, 
  1935, 
  West 
  Coast 
  Shells 
  (Keep), 
  p. 
  199 
  

   Littorina 
  {Melarhaphe) 
  scutulata 
  pullata 
  Carpenter, 
  Burch, 
  1945, 
  no. 
  55, 
  p. 
  10, 
  12 
  

  

  This 
  species 
  was 
  described 
  from 
  Cape 
  San 
  Lucas 
  but 
  is 
  recorded 
  by 
  Burch 
  as 
  ranging 
  to 
  

   Monterey, 
  California 
  

  

  Family 
  Rissoidae 
  

   Genus 
  Amphithalamus 
  Carpenter. 
  1864 
  

   Amphithalamus 
  Carpenter, 
  1864b, 
  p. 
  614, 
  656; 
  Reprint, 
  1872, 
  p. 
  100, 
  142; 
  1866. 
  California 
  

   Acad. 
  Sci., 
  Proc, 
  vol. 
  Ill, 
  p. 
  218; 
  Bartsch, 
  1911, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  41, 
  p. 
  263 
  

   Type 
  species 
  by 
  original 
  designation, 
  A. 
  inclusus 
  Carpenter, 
  1864b, 
  p. 
  614, 
  656. 
  Recent. 
  

   Catalina 
  Island 
  to 
  San 
  Diego, 
  California. 
  Bartsch, 
  1911, 
  U. 
  S. 
  Nat. 
  Mus., 
  Proc, 
  vol. 
  41, 
  

   p. 
  264, 
  fig. 
  2 
  

  

  Scrobs 
  Watson 
  (1866, 
  p. 
  612), 
  applied 
  to 
  Australian 
  and 
  New 
  Zealand 
  species, 
  has 
  been 
  

   regarded 
  by 
  some 
  authors 
  (Tryon, 
  1887, 
  Bartsch, 
  1911, 
  Suter, 
  1913) 
  as 
  synonymous 
  with 
  

   Amphithalamus. 
  Both 
  genera 
  may 
  have 
  the 
  unusual 
  shelly 
  reinforcement 
  of 
  the 
  aperture 
  in 
  

   the 
  parietal 
  and 
  columellar 
  area, 
  but 
  that 
  feature 
  is 
  not 
  constant 
  in 
  either. 
  Iredale 
  (1915, 
  p. 
  

   448, 
  449) 
  maintained 
  the 
  distinctness 
  of 
  the 
  two 
  genera, 
  and 
  Powell 
  (1927, 
  p. 
  545) 
  aptly 
  

   pointed 
  out 
  that 
  

  

  "the 
  resemblance 
  of 
  the 
  Austral 
  shells 
  to 
  Amphithalamus 
  is 
  merely 
  superficial, 
  prejudiced 
  

   by 
  the 
  presence 
  of 
  a 
  depression 
  separating 
  aperture 
  from 
  body-whorl. 
  In 
  nuclear 
  characters 
  

   Scrobs 
  is 
  quite 
  unlike 
  Amphithalamus, 
  this 
  latter 
  genus 
  having 
  protoconch 
  sculptured 
  with 
  

  

  