﻿COBBULA. 
  Panama 
  Shells. 
  623 
  

  

  odd 
  valves, 
  of 
  a 
  clear 
  pink 
  color, 
  were 
  picked 
  up 
  ; 
  

   Cuming 
  ! 
  Sowerby 
  : 
  also 
  Keeve. 
  

   S. 
  America 
  ; 
  Hanley. 
  

   Taboga 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   6 
  odd 
  valves 
  and 
  1 
  entire 
  specimen 
  were 
  found. 
  The 
  latter 
  

   is 
  of 
  extraordinary 
  size 
  and 
  thickness. 
  Its 
  dimensions 
  are 
  — 
  

   length 
  1.22 
  inch 
  ; 
  height 
  .81 
  inch 
  ; 
  width 
  .68 
  inch 
  ; 
  it 
  weighs 
  

   I 
  oz. 
  On 
  and 
  around 
  the 
  umbones, 
  it 
  is 
  of 
  a 
  clear 
  pink 
  color. 
  

  

  506. 
  Corbiila 
  rubra, 
  Nov. 
  sp. 
  

  

  Shell 
  subovate, 
  moderately 
  inequivalve 
  and 
  inequilateral, 
  

   posteriorly 
  acuminate, 
  with 
  the 
  ventral 
  margin 
  arcuate, 
  anteriorly 
  

   rounded 
  : 
  rufous, 
  with 
  a 
  short 
  white 
  ray 
  on 
  the 
  anterior 
  side 
  of 
  

   the 
  umbo, 
  and 
  a 
  dark 
  red 
  spot 
  before 
  it 
  : 
  with 
  fine 
  concentric 
  

   strice, 
  decussated 
  by 
  radiating 
  microscopic 
  strise 
  : 
  beaks 
  not 
  very 
  

   prominent 
  : 
  umbones 
  prominent, 
  somewhat 
  angulated 
  on 
  both 
  

   sides 
  near 
  the 
  beaks 
  : 
  teeth 
  small. 
  Our 
  unique 
  specimen 
  has 
  a 
  

   broad 
  flexure 
  a 
  little 
  behind 
  the 
  middle 
  : 
  but 
  this 
  may 
  be 
  an 
  

   accidental 
  growth. 
  

  

  Length 
  .31 
  inch 
  ; 
  height 
  .19 
  inch 
  ; 
  breadth 
  .14 
  inch. 
  

  

  Station 
  . 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   Only 
  1 
  specimen 
  was 
  obtained. 
  

  

  oOY. 
  Corbula 
  tenuis. 
  Nnr-ffT 
  , 
  

  

  Synonymy. 
  

  

  Corbula 
  tenuis 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Loncl. 
  p. 
  36. 
  Mar. 
  1836. 
  

  

  Mull. 
  Syn. 
  Test. 
  Viv. 
  p. 
  231. 
  May 
  1836. 
  

  

  — 
  Keeve 
  Conch. 
  Icon. 
  pi. 
  2. 
  f. 
  13. 
  Sept. 
  1843. 
  

  

  StoJion. 
  — 
  Sandy 
  mud, 
  at 
  the 
  depth 
  of 
  12 
  fathoms 
  ; 
  Cuming 
  ! 
  

   Sowerby 
  : 
  also 
  Eeeve. 
  

  

  flahitaf. 
  — 
  Bay 
  of 
  Montijo 
  ; 
  Cuming! 
  Sowerby: 
  alsoMiiller: 
  

   also 
  Reeve. 
  

   Mazatlan 
  ; 
  E. 
  Jewett 
  1 
  Gould 
  MSB. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  