﻿116 
  ON 
  THE 
  NAIADES, 
  

  

  Hab. 
  Hopeton, 
  near 
  Darien, 
  Georgia. 
  Professor 
  Shepard. 
  

  

  My 
  Cabinet. 
  

  

  Cabinet 
  of 
  Professor 
  Shepard. 
  

  

  Diam. 
  1*4, 
  Length 
  1-7 
  inches. 
  

  

  Remarks. 
  — 
  I 
  owe 
  to 
  the 
  kindness 
  of 
  professor 
  Shepard 
  of 
  New 
  

   Haven 
  this 
  interesting 
  shell. 
  It 
  was 
  procured 
  by 
  him 
  during 
  his 
  late 
  

   geological 
  investigations 
  in 
  our 
  southern 
  states, 
  with 
  other 
  shells, 
  de- 
  

   scriptions 
  of 
  which 
  will 
  be 
  found 
  in 
  these 
  memoirs. 
  It 
  resembles 
  the 
  

   Ji.fasciata 
  (Lam.), 
  but 
  is 
  less 
  globose, 
  the 
  whorls 
  of 
  our 
  species 
  being 
  

   somewhat 
  flattened 
  on 
  the 
  side 
  and 
  top. 
  It 
  differs 
  from 
  the 
  A. 
  depressa 
  

   (Say), 
  described 
  in 
  major 
  Long's 
  expedition 
  to 
  St 
  Peter's 
  river 
  (subse- 
  

   quently 
  changed 
  to 
  A. 
  paludosa 
  in 
  the 
  Disseminator), 
  in 
  being 
  less 
  

   globose, 
  and 
  in 
  being 
  flatter 
  on 
  the 
  side 
  and 
  superior 
  part 
  of 
  the 
  whorls. 
  

  

  Paludina 
  Georgiana. 
  Plate 
  XIX. 
  fig. 
  85. 
  

  

  Testa 
  ventricoso-conoided, 
  tenui, 
  tenebroso-cornea, 
  Isevi 
  ; 
  suturis 
  valde 
  i?npressis 
  .- 
  

   anfractibus 
  instar 
  qicinis, 
  convexis 
  ; 
  aperturd 
  subrolundatd, 
  alba. 
  

  

  Shell 
  venlricoso-conical, 
  thin, 
  dark 
  horn 
  coloured, 
  smooth 
  ; 
  sutures 
  very 
  much 
  im- 
  

   pressed 
  ; 
  whorls 
  about 
  five, 
  convex 
  ; 
  aperture 
  nearly 
  round, 
  white. 
  

  

  Hab. 
  Hopeton, 
  near 
  Darien, 
  Georgia. 
  Professor 
  Shepard. 
  

  

  My 
  Cabinet. 
  

  

  Cabinet 
  of 
  Professor 
  Shepard. 
  

  

  Diam. 
  -7, 
  Length 
  1-1 
  inches. 
  

  

  Remarks. 
  — 
  This 
  species, 
  in 
  form, 
  resembles 
  most, 
  perhaps, 
  the 
  P. 
  

   vivipara. 
  It 
  is 
  not 
  quite 
  so 
  large, 
  nor 
  has 
  it 
  bands. 
  It 
  is 
  rather 
  more 
  

   elevated, 
  and 
  the 
  body 
  whorl 
  is 
  smaller 
  and 
  rounder 
  than 
  the 
  P. 
  decisa 
  

   (Say). 
  The 
  aperture 
  at 
  the 
  base 
  recedes 
  more 
  than 
  is 
  usual 
  with 
  this 
  

   genus. 
  

  

  