﻿96 
  ON 
  THE 
  NAIADES, 
  

  

  Remarks. 
  — 
  This 
  remarkable 
  species, 
  in 
  its 
  great 
  transverseness 
  and 
  

   outline, 
  has 
  some 
  resemblance 
  to 
  U. 
  Gray 
  anus 
  (nobis). 
  It 
  is 
  much 
  

   more 
  transverse 
  than 
  any 
  species 
  heretofore 
  discovered 
  from 
  this 
  coun- 
  

   try. 
  The 
  purple 
  of 
  the 
  interior 
  is 
  like 
  that 
  of 
  the 
  complanatus 
  (Soland.). 
  

   In 
  one 
  specimen 
  there 
  is 
  a 
  muscular 
  impression 
  near 
  the 
  centre 
  of 
  the 
  

   cavity 
  of 
  the 
  shell, 
  similar 
  to 
  that 
  of 
  the 
  U. 
  trapezoides 
  (nobis). 
  In 
  

   another 
  specimen 
  there 
  are 
  obsolete 
  marks 
  of 
  an 
  impression. 
  The 
  third 
  

   has 
  none 
  that 
  can 
  be 
  distinguished. 
  

  

  I. 
  am 
  indebted 
  to 
  the 
  great 
  kindness 
  of 
  professor 
  Shepard 
  of 
  New 
  

   Haven 
  for 
  this 
  interesting 
  and 
  curious 
  species, 
  and 
  it 
  is 
  with 
  pleasure 
  

   I 
  dedicate 
  it 
  to 
  him. 
  

  

  Unio 
  fulvus. 
  Plate 
  XIII. 
  fisr. 
  39. 
  

  

  O" 
  

  

  Testa 
  angusto-ellipticd, 
  insequilaterali, 
  transversa, 
  postice 
  subangulatd 
  ; 
  clivo 
  

   umboniali 
  rotundato 
  ; 
  valvulis 
  tenuiculis 
  ; 
  natibus 
  prominulis 
  ; 
  epidermide 
  luted; 
  

   dent 
  e 
  car 
  dinali 
  obliquo, 
  laterali 
  subcurvo 
  ; 
  margaritd 
  salmonis 
  colore 
  tinctd. 
  

  

  Shell 
  narrow-elliptical, 
  inequilateral, 
  transverse, 
  subangular 
  behind 
  ; 
  umbonial 
  slope 
  

   rounded 
  ; 
  valves 
  rather 
  thin 
  ; 
  beaks 
  slightly 
  elevated 
  ; 
  epidermis 
  yellow 
  : 
  cardinal 
  teeth 
  

   oblique 
  ; 
  lateral 
  teeth 
  somewhat 
  curved 
  ; 
  nacre 
  salmon. 
  

  

  Hab 
  , 
  South 
  Carolina. 
  Dr 
  Blanding. 
  

  

  My 
  Cabinet. 
  

  

  Cabinet 
  of 
  Dr 
  Blanding. 
  

  

  Diam. 
  *6, 
  Length 
  -9, 
  Breadth 
  1-6 
  inches. 
  

  

  Shell 
  narrow-elliptical, 
  inequilateral, 
  transverse, 
  slightly 
  inflated 
  ; 
  

   umbonial 
  slope 
  rounded; 
  substance 
  of 
  the 
  shell 
  rather 
  thin; 
  beaks 
  

   slightly 
  elevated, 
  placed 
  towards 
  the 
  anterior 
  margin; 
  ligament 
  thin 
  

   and 
  rather 
  short 
  ; 
  epidermis 
  yellow 
  and 
  yellowish 
  brown 
  ; 
  cardinal 
  teeth 
  

   oblique, 
  short, 
  disposed 
  to 
  be 
  lobed, 
  single 
  in 
  the 
  right 
  and 
  double 
  in 
  

   the 
  left 
  valve 
  ; 
  lateral 
  teeth 
  slightly 
  curved, 
  rather 
  long 
  ; 
  anterior 
  cica- 
  

   trices 
  distinct 
  ; 
  posterior 
  cicatrices 
  confluent; 
  dorsal 
  cicatrices 
  placed 
  in 
  

   the 
  centre 
  of 
  the 
  cavity 
  of 
  the 
  beaks 
  ; 
  cavity 
  of 
  the 
  beaks 
  very 
  shallow 
  ; 
  

   cavity 
  of 
  the 
  shell 
  somewhat 
  deep 
  ; 
  nacre 
  salmon. 
  

  

  