﻿AND 
  OTHER 
  FAMILIES. 
  47 
  

  

  also 
  more 
  straight 
  on 
  the 
  dorsal 
  margin. 
  The 
  smoothness 
  and 
  polish, 
  

   as 
  well 
  as 
  the 
  brightness 
  of 
  the 
  green 
  of 
  some 
  of 
  the 
  specimens 
  are 
  

   very 
  remarkable. 
  

  

  Anodonta 
  Stewartiana. 
  Plate 
  VI. 
  fig. 
  17. 
  

  

  Testa 
  rotundato-ovatd, 
  valde 
  inflatd 
  ; 
  valvulis 
  pertenuibus 
  ; 
  epidermide 
  subas- 
  

   perd, 
  te?iebroso-viridi, 
  natibus 
  prominentibus, 
  apicibus 
  granulatis 
  ; 
  cicatricibus 
  

   subobsoletis 
  aut 
  vix 
  perspicuis 
  ; 
  margarita 
  cceruleo-albd. 
  

  

  Shell 
  rot 
  un 
  do-ovate, 
  much 
  inflated 
  ; 
  valves 
  very 
  thin 
  ; 
  epidermis 
  roughish, 
  olive 
  

   green 
  ; 
  beaks 
  prominent 
  and 
  granulate 
  at 
  tip 
  ; 
  cicatrices 
  scarcely 
  perceptible 
  ; 
  nacre 
  

   bluish 
  white. 
  

  

  Hab. 
  River 
  Teche, 
  Louisiana. 
  W. 
  M. 
  Stewart. 
  

  

  My 
  Cabinet. 
  

   Cabinet 
  of 
  the 
  Academy 
  of 
  Natural 
  Sciences 
  of 
  Philadelphia. 
  

   Cabinet 
  of 
  Mr 
  Stewart. 
  

   Diam. 
  1*8, 
  Length 
  2, 
  Breadth 
  3*1 
  inches. 
  

  

  Shell 
  rotundo-ovate, 
  much 
  inflated, 
  subangular 
  behind 
  ; 
  dorsal 
  line 
  

   slightly 
  curved 
  ; 
  substance 
  of 
  the 
  shell 
  thin 
  ; 
  epidermis 
  somewhat 
  

   rough, 
  olive 
  green 
  and 
  obsoletely 
  rayed 
  ; 
  beaks 
  prominent, 
  granulate 
  

   at 
  tip 
  in 
  a 
  short 
  double 
  series 
  ; 
  cicatrices 
  scarcely 
  perceptible 
  ; 
  cavity 
  

   of 
  the 
  beaks 
  deep 
  and 
  incurved 
  ; 
  cavity 
  of 
  the 
  disk 
  deep 
  and 
  rounded 
  ; 
  

   nacre 
  bluish 
  white 
  and 
  iridescent, 
  sometimes 
  tinged 
  with 
  salmon 
  co- 
  

   lour 
  about 
  the 
  region 
  of 
  the 
  beaks. 
  

  

  Remarks. 
  — 
  I 
  owe 
  this 
  species 
  with 
  numerous 
  others 
  to 
  my 
  friend 
  

   Mr 
  Stewart 
  who 
  procured 
  and 
  gave 
  it 
  to 
  me 
  more 
  than 
  two 
  years 
  since. 
  

   I 
  did 
  not 
  then 
  describe 
  it, 
  although 
  I 
  believed 
  it 
  to 
  be 
  new, 
  intending 
  

   it 
  to 
  accompany 
  some 
  others 
  which 
  are 
  now 
  embodied 
  in 
  this 
  memoir. 
  

   It 
  is 
  an 
  interesting 
  species, 
  being 
  much 
  inflated 
  — 
  the 
  young 
  specimens 
  

   approached 
  the 
  globose 
  form. 
  It 
  is 
  most 
  similar 
  in 
  form 
  to 
  the 
  

   gibbosa 
  (Say), 
  but 
  is 
  perhaps 
  less 
  inflated, 
  does 
  not 
  possess 
  a 
  polished 
  

   epidermis, 
  and 
  has 
  granulations 
  at 
  the 
  termination 
  of 
  the 
  beaks, 
  while 
  

   the 
  gibbosa 
  has 
  undulations. 
  The 
  inflation 
  of 
  the 
  Stewartiana 
  is 
  more 
  

  

  