﻿AND 
  OTHER 
  FAMILIES. 
  29 
  

  

  with 
  undulations. 
  In 
  the 
  possession 
  of 
  many 
  folds, 
  it 
  resembles 
  the 
  

   U. 
  multiplicahis 
  (nobis), 
  but 
  differs 
  in 
  outline 
  (being 
  much 
  less 
  trans- 
  

   verse), 
  as 
  well 
  as 
  in 
  the 
  size 
  of 
  the 
  undulations, 
  which 
  are 
  much 
  smaller. 
  

   The 
  point 
  of 
  its 
  greatest 
  diameter 
  is 
  much 
  nearer 
  the 
  posterior 
  basal 
  

   margin 
  than 
  in 
  the 
  multiplicatus. 
  The 
  imperfect 
  state 
  of 
  this 
  speci- 
  

   men 
  has 
  prevented 
  me 
  from 
  describing 
  the 
  ligament. 
  Judging 
  from 
  

   its 
  elevated 
  wing, 
  I 
  am 
  much 
  inclined 
  to 
  believe 
  that 
  when 
  perfect 
  

   specimens 
  are 
  procured 
  they 
  will 
  be 
  found 
  to 
  be 
  connate. 
  If 
  so, 
  it 
  

   will 
  belong 
  to 
  a 
  natural 
  division 
  removed 
  from 
  Unto, 
  viz. 
  Symphynota. 
  

   I 
  have 
  dedicated 
  this 
  fine 
  species 
  to 
  my 
  friend 
  P. 
  H. 
  Nicklin, 
  Esq., 
  of 
  

   Philadelphia. 
  

  

  Unio 
  capillaris. 
  Plate 
  II. 
  fig. 
  2. 
  

  

  Testa 
  suborbiculatd, 
  ventricosd, 
  subsequilaterali, 
  postice 
  subangulatd 
  ; 
  valvulis 
  

   subcrassis 
  ; 
  natibus 
  prominentibus 
  ; 
  epidermide 
  nitide 
  rugatd; 
  radiis 
  numerosis 
  

   capillaribusque 
  ; 
  dentibus 
  cardinalibus 
  valde 
  elevatis 
  ; 
  lateralibas 
  lamellatis 
  et 
  sur- 
  

   sam 
  subreclivis 
  ; 
  margaritd 
  albd 
  et 
  iridescente. 
  

  

  Shell 
  suborbicular, 
  ventricose, 
  subequilateral, 
  subangular 
  posteriorly; 
  valves 
  rather 
  

   thick; 
  beaks 
  elevated 
  ; 
  epidermis 
  finely 
  wrinkled 
  ; 
  rays 
  numerous 
  and 
  capillary 
  ; 
  car- 
  

   dinal 
  teeth 
  much 
  elevated 
  ; 
  lateral 
  teeth 
  lamellar, 
  and 
  inclined 
  to 
  curve 
  upwards; 
  nacre 
  

   pearly 
  white 
  and 
  iridescent. 
  

  

  Hab. 
  Ohio. 
  T. 
  G. 
  Lea. 
  

  

  My 
  Cabinet. 
  

  

  Cabinet 
  of 
  the 
  Academy 
  of 
  Natural 
  Sciences 
  of 
  Philadelphia. 
  

  

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

  

  Shell 
  suborbicular, 
  ventricose, 
  subequilateral, 
  subangular 
  posteriorly 
  ; 
  

  

  substance 
  of 
  the 
  shell 
  rather 
  thick 
  anteriorly; 
  thinner 
  posteriorly; 
  

  

  beaks 
  thick 
  and 
  elevated 
  ; 
  ligament 
  short 
  and 
  thick 
  ; 
  epidermis 
  dark 
  

  

  and 
  finely 
  wrinkled, 
  smoother 
  towards 
  the 
  beaks; 
  rays 
  numerous, 
  

  

  capillary, 
  and 
  spreading 
  over 
  nearly 
  the 
  whole 
  disk; 
  cardinal 
  teeth 
  

  

  elevated, 
  crenate, 
  deeply 
  cleft 
  in 
  the 
  left 
  valve, 
  and 
  rising 
  from 
  a 
  pit 
  

  

  in 
  the 
  right 
  ; 
  lateral 
  teeth 
  lamellar, 
  crenate, 
  inclined 
  to 
  turn 
  upwards 
  ; 
  

  

  anterior 
  cicatrices 
  distinct; 
  posterior 
  cicatrices 
  confluent; 
  dorsal 
  cica- 
  

  

  vol. 
  v. 
  — 
  H 
  

  

  