﻿228 
  Descriptions 
  of 
  New 
  Species 
  of 
  Marginella, 
  Sfc. 
  

  

  num 
  for 
  the 
  the 
  original 
  mention 
  of 
  C. 
  histrio. 
  Since 
  then, 
  

   the 
  munificence 
  of 
  Dr. 
  T. 
  B. 
  Wilson, 
  of 
  Philadelphia, 
  has 
  

   supplied 
  the 
  library 
  of 
  the 
  Academy 
  of 
  Natural 
  Sciences 
  of 
  

   that 
  city 
  with 
  a 
  large 
  number 
  of 
  rare 
  books 
  upon 
  natural 
  his- 
  

   tory, 
  among 
  which 
  is 
  the 
  Museum 
  G-eversianum, 
  from 
  which 
  

   I 
  am 
  now 
  enabled 
  to 
  quote 
  what 
  is 
  said 
  of 
  the 
  species 
  in 
  

   question, 
  with 
  Meuschen's 
  references. 
  

  

  "No. 
  1381, 
  P. 
  (Porcellana) 
  histrio: 
  elevatior, 
  testa 
  maculis 
  atro-fuscis, 
  

   albida 
  fusco-reticiilata. 
  

  

  Linn. 
  327 
  ct. 
  sen. 
  o. 
  Seba 
  iii. 
  55 
  in 
  No. 
  23. 
  Lister 
  659, 
  3 
  a. 
  

   Argenv. 
  Suppl. 
  2 
  L. 
  Rumphius 
  39 
  R? 
  Petiv. 
  Gaz. 
  53 
  b. 
  

  

  These 
  citations, 
  particularly 
  that 
  of 
  Lister's 
  figure, 
  seem 
  

   to 
  fix 
  distinctly 
  the 
  history 
  and 
  character 
  of 
  C. 
  histrio 
  as 
  a 
  

   distinct 
  shell 
  from 
  Martyn's. 
  

  

  In 
  confirmation 
  of 
  the 
  views 
  expressad 
  in 
  that 
  paper, 
  I 
  am 
  

   enabled, 
  by 
  the 
  kindness 
  of 
  Dr. 
  Gould, 
  to 
  communicate 
  the 
  

   following 
  note 
  made 
  by 
  Mr. 
  Couthouy, 
  at 
  Disappointment 
  

   Island, 
  (A-too-a,) 
  while 
  connected 
  with 
  the 
  U. 
  S. 
  Exploring 
  

   Expedition, 
  showing 
  that 
  the 
  soft 
  parts 
  of 
  C. 
  reticulata 
  differ 
  

   essentially 
  from 
  those 
  both 
  of 
  C. 
  arabica 
  and 
  C. 
  histrio. 
  

  

  "This 
  (6*. 
  maculata 
  Bar 
  nes=C. 
  reticulata 
  Martyn) 
  was 
  

   published 
  as 
  a 
  distinct 
  species 
  from 
  C. 
  arabica, 
  by 
  Barnes, 
  

   with 
  very 
  good 
  reason, 
  notwithstanding 
  it 
  was 
  disputed 
  in 
  the 
  

   same 
  journal 
  by 
  some 
  English 
  author 
  not 
  recollected, 
  who 
  as- 
  

   serts 
  it 
  to 
  be 
  nothing 
  but 
  a 
  variety 
  of 
  that 
  shell. 
  Q,uoy 
  and 
  

   Gaimard, 
  however, 
  figure 
  that 
  as 
  having 
  the 
  mouth 
  sprinkled 
  

   with 
  simple 
  white 
  tubercles, 
  and 
  there 
  is 
  a 
  black 
  band 
  on 
  the 
  

   extremity 
  of 
  the 
  siphon. 
  In 
  C. 
  maculata 
  the 
  mantle 
  is 
  nearly 
  

   the 
  color 
  of 
  burnt 
  sienna, 
  with 
  undulating 
  veins 
  of 
  very 
  deep 
  

   brown, 
  and 
  very 
  thickly 
  ornamented 
  with 
  short, 
  slender, 
  and 
  

   taper 
  papillae. 
  Towards 
  the 
  aperture 
  it 
  is 
  lighter 
  colored 
  than 
  

   elsewhere. 
  The 
  white 
  patches 
  on 
  the 
  back 
  are 
  all 
  distinct 
  and 
  

   separate, 
  as 
  in 
  C. 
  histrio^ 
  but 
  the 
  animal 
  isividely 
  distinct 
  from 
  

   that 
  species.^'' 
  

  

  