﻿AND 
  OTHER 
  FAMILIES. 
  101 
  

  

  Remarks. 
  — 
  This 
  species 
  has 
  most 
  resemblance 
  in 
  its 
  general 
  charac- 
  

   ters 
  to 
  the 
  parvus 
  (Barnes). 
  It 
  is, 
  however, 
  a 
  larger 
  shell, 
  and 
  in 
  the 
  

   undulations 
  of 
  the 
  beaks 
  it 
  is 
  very 
  different. 
  Like 
  the 
  parvus, 
  the 
  sili- 
  

   quoideus, 
  the 
  cariosus 
  and 
  crassus, 
  it 
  is 
  sometimes 
  very 
  much 
  truncated 
  

   behind. 
  In 
  this 
  state 
  it 
  might 
  be 
  mistaken 
  for 
  a 
  different 
  species, 
  did 
  

   not, 
  as 
  in 
  the 
  abovementioned 
  species, 
  the 
  other 
  characters 
  strictly 
  iden- 
  

   tify 
  it. 
  

  

  Unio 
  Blandingianus. 
  Plate 
  XV. 
  fig. 
  44. 
  

  

  Testa 
  subtrapezoided, 
  transversa, 
  inxquilaterali, 
  subinflatd; 
  valvulis 
  tenuibus 
  ; 
  

   natibus 
  prominulis 
  ; 
  dentibus 
  cardinalibus 
  compressis 
  ; 
  lateralibus 
  longis 
  cur- 
  

   visque; 
  margaritd 
  purpurea. 
  

  

  Shell 
  subtrapezoidal, 
  transverse, 
  inequilateral, 
  somewhat 
  inflated 
  ; 
  valves 
  thin 
  ; 
  beaks 
  

   somewhat 
  prominent 
  ; 
  cardinal 
  teeth 
  compressed 
  ; 
  lateral 
  teeth 
  long 
  and 
  curved 
  ; 
  nacre 
  

   purple. 
  

  

  Hab. 
  St 
  John's 
  river, 
  ? 
  Florida. 
  Dr 
  Blanding. 
  

  

  My 
  Cabinet. 
  

  

  Cabinet 
  of 
  Dr 
  Blanding. 
  

  

  Diam. 
  -9, 
  Length 
  1-5, 
  Breadth 
  2-3 
  inches. 
  

  

  Shell 
  subtrapezoidal, 
  transverse, 
  very 
  inequilateral, 
  somewhat 
  in- 
  

   flated; 
  substance 
  of 
  the 
  shell 
  thin; 
  beaks 
  somewhat 
  prominent, 
  

   placed 
  near 
  to 
  the 
  anterior 
  margin 
  ; 
  ligament 
  rather 
  long 
  and 
  narrow 
  ; 
  

   epidermis 
  fuscous, 
  wrinkled 
  ; 
  cardinal 
  teeth 
  compressed, 
  double 
  in 
  the 
  

   left 
  valve 
  and 
  single 
  in 
  the 
  right; 
  lateral 
  teeth 
  long, 
  curved 
  and 
  some- 
  

   what 
  lamellar; 
  anterior 
  cicatrices 
  distinct; 
  posterior 
  cicatrices 
  conflu- 
  

   ent; 
  dorsal 
  cicatrices 
  placed 
  in 
  the 
  centre 
  of 
  the 
  cavity 
  of 
  the 
  beaks; 
  

   cavity 
  of 
  the 
  shell 
  rather 
  deep; 
  cavity 
  of 
  the 
  beaks 
  wide 
  and 
  shallow; 
  

   nacre 
  dull 
  purple. 
  

  

  Remarks. 
  — 
  I 
  owe 
  to 
  the 
  kindness 
  of 
  Dr 
  Blanding 
  the 
  specimens 
  of 
  

   this 
  species 
  which 
  are 
  in 
  my 
  cabinet. 
  They 
  were 
  procured 
  by 
  this 
  

   naturalist 
  while 
  in 
  St 
  Augustine, 
  from 
  an 
  Indian 
  whom 
  he 
  had 
  directed 
  

   to 
  collect 
  for 
  him, 
  and 
  it 
  is 
  presumed 
  they 
  came 
  from 
  St 
  John's 
  river 
  

  

  VOL. 
  V. 
  2 
  A 
  

  

  