﻿AND 
  OTHER 
  FAMILIES. 
  115 
  

  

  Remarks. 
  — 
  This 
  is 
  perhaps 
  the 
  most 
  attenuated 
  Lymnaea 
  yet 
  ob- 
  

   served 
  in 
  this 
  country. 
  It 
  approaches 
  most 
  to 
  the 
  reflexus 
  (Say), 
  but 
  

   is 
  more 
  elongate 
  than 
  that 
  species. 
  The 
  most 
  remarkable 
  character 
  of 
  

   the 
  exilis 
  is, 
  perhaps, 
  the 
  reflection 
  of 
  its 
  labium, 
  which 
  is 
  not 
  laid 
  on 
  

   the 
  body 
  of 
  the 
  whorl. 
  Where 
  it 
  joins 
  above 
  with 
  the 
  labrum, 
  the 
  

   angle 
  is 
  quite 
  acute, 
  and 
  is 
  separated 
  from 
  the 
  body 
  whorl. 
  The 
  spe- 
  

   cimen 
  figured 
  was 
  not 
  taken 
  alive, 
  and 
  the 
  epidermis 
  being 
  destroyed, 
  

   the 
  description 
  and 
  representation 
  are 
  partially 
  defective. 
  The 
  aper- 
  

   ture 
  is 
  about 
  two-fifths 
  the 
  length 
  of 
  the 
  shell. 
  

  

  Physa 
  elliptic 
  a. 
  Plate 
  XIX. 
  fig. 
  83. 
  

  

  Testa 
  sinistrosd, 
  ellipticd, 
  tenuissimd, 
  pellucidd, 
  castaned, 
  nitidd; 
  spird 
  brevius- 
  

   culd; 
  anfractibus 
  quaternis; 
  labro 
  marginato 
  ; 
  aperturd 
  angustatd. 
  

  

  Shell 
  sinister, 
  elliptical, 
  very 
  thin, 
  pellucid, 
  chesnut 
  coloured, 
  shining; 
  spire 
  rather 
  

   short; 
  whorls 
  four; 
  outer 
  lip 
  margined; 
  aperture 
  narrow. 
  

  

  Hab 
  T. 
  G. 
  Lea. 
  

  

  My 
  Cabinet. 
  

   Diam. 
  -2, 
  Length 
  *5 
  of 
  an 
  inch 
  

  

  Remarks. 
  — 
  This 
  species 
  is 
  less 
  inflated 
  and 
  more 
  of 
  a 
  chestnut 
  colour 
  

   than 
  any 
  I 
  am 
  acquainted 
  with. 
  Its 
  colour 
  is 
  almost 
  reddish, 
  and 
  the 
  

   light 
  coloured 
  margin 
  of 
  the 
  outer 
  lip 
  is 
  remarkable. 
  The 
  aperture 
  

   is 
  rather 
  contracted, 
  and 
  the 
  whole 
  shell 
  somewhat 
  elongate. 
  

  

  Ampullaria 
  Hopetonensis. 
  Plate 
  XIX. 
  fig. 
  84. 
  

  

  Testa 
  subventricosd, 
  Isevi, 
  superne 
  subplanulatd, 
  perforata, 
  luteo-fuscescente, 
  

   fasciata 
  ; 
  suturis 
  impress 
  is 
  ; 
  anfractibus 
  quinis 
  ; 
  aperturd 
  subovatd, 
  alba. 
  

  

  Shell 
  subventricose, 
  smooth, 
  flattened 
  above, 
  umbilicate, 
  yellowish-brown, 
  banded 
  ; 
  

   sutures 
  impressed 
  ; 
  whorls 
  five 
  ; 
  aperture 
  subovate, 
  white. 
  

  

  # 
  

  

  