﻿AND 
  OTHER 
  FAMILIES. 
  83 
  

  

  Hab. 
  Peru. 
  Lieutenant 
  Humphreys. 
  

  

  My 
  Cabinet. 
  

  

  Cabinet 
  of 
  the 
  Academy 
  of 
  Natural 
  Sciences 
  of 
  Philadelphia. 
  

  

  Diam. 
  -3, 
  Length 
  -5 
  inches. 
  

  

  Remarks. 
  — 
  The 
  genus 
  Melanopsis, 
  a 
  few 
  years 
  since, 
  presented, 
  to 
  our 
  

   knowledge, 
  only 
  two 
  species. 
  These 
  were 
  described 
  by 
  Lamarck. 
  The 
  

   rapid 
  advancement 
  of 
  our 
  science 
  has 
  recently 
  brought 
  to 
  light 
  many 
  

   new 
  ones. 
  I 
  have 
  eight 
  species 
  in 
  my 
  own 
  cabinet, 
  and 
  in 
  this 
  memoir 
  

   I 
  add 
  two 
  species 
  to 
  the 
  ten 
  now 
  known. 
  These 
  two 
  are 
  peculiarly 
  

   and 
  beautifully 
  spotted 
  in 
  the 
  epidermis. 
  The 
  two 
  specimens 
  brought 
  

   by 
  lieutenant 
  Humphreys 
  have 
  each 
  four 
  transverse 
  purple 
  bands 
  on 
  

   the 
  inside, 
  and 
  the 
  dark 
  olive 
  epidermis 
  is 
  filled 
  with 
  very 
  distinct 
  in- 
  

   tensely 
  dark 
  brown 
  quadrate 
  spots. 
  This 
  species, 
  and 
  the 
  prineeps 
  

   herein 
  described, 
  form 
  a 
  division 
  in 
  the 
  genus 
  Melanopsis 
  of 
  Lamarck 
  

   which 
  genus 
  should 
  be 
  altered, 
  leaving 
  out 
  the 
  character 
  of 
  the 
  callus 
  

   on 
  the 
  upper 
  part 
  of 
  the 
  columella. 
  Neither 
  of 
  these 
  has 
  that 
  char- 
  

   acter, 
  but, 
  notwithstanding, 
  should 
  not 
  be 
  removed 
  to 
  a 
  new 
  genus, 
  as 
  

   it 
  is, 
  independent 
  of 
  that, 
  a 
  perfectly 
  natural 
  one. 
  

  

  Auricula 
  fuscagula. 
  Plate 
  XIX. 
  fig. 
  76. 
  

  

  Testa 
  fusiformi, 
  albidd, 
  pellucidd 
  ; 
  suturis 
  impressis 
  et 
  albo-lineatis 
  ; 
  labro 
  late 
  

   reflexo 
  ; 
  guld 
  fused 
  et 
  dentibus 
  novenis 
  munitd. 
  

  

  Shell 
  fusiform-, 
  whitish, 
  diaphanous 
  ; 
  sutures 
  impressed 
  and 
  presenting 
  a 
  white 
  line 
  ; 
  

   outer 
  lip 
  widely 
  reflected 
  ; 
  throat 
  dark 
  brown 
  and 
  furnished 
  with 
  nine 
  teeth. 
  

  

  Hab. 
  Brazil. 
  

  

  My 
  Cabinet. 
  

   Cabinet 
  of 
  P. 
  H. 
  Nicklin. 
  

   Diam. 
  -4, 
  Length 
  1*1 
  inches. 
  

  

  Remarks. 
  — 
  This 
  is 
  a 
  very 
  remarkable 
  and 
  interesting 
  species. 
  In 
  

   its 
  general 
  form 
  and 
  aperture 
  it 
  resembles 
  a 
  Clausilia. 
  Like 
  some 
  

   species 
  of 
  that 
  genus 
  its 
  mouth 
  is 
  studded 
  with 
  teeth. 
  Of 
  the 
  nine, 
  

  

  