﻿COLUMBELLA. 
  Panama 
  Shells. 
  313 
  

  

  southern 
  limit, 
  so 
  far 
  as 
  authentic 
  testimony 
  goes, 
  reached 
  by 
  

   any 
  of 
  the 
  species 
  which 
  inhabit 
  the 
  Bay 
  of 
  Panama, 
  and 
  we 
  

   have, 
  therefore, 
  some 
  doubt 
  of 
  the 
  accuracy 
  of 
  Kiener's 
  state- 
  

   ment. 
  

  

  88. 
  Columbella 
  gracilis. 
  Nov. 
  sp. 
  

  

  Shell 
  long 
  ovate 
  conic 
  ; 
  upper 
  whorls 
  pale 
  brown 
  ; 
  with 
  irre- 
  

   gular 
  spots 
  of 
  darker 
  reddish 
  brown, 
  mostly 
  near 
  the 
  suture 
  

   and 
  nearly 
  covering 
  the 
  last 
  whorl, 
  on 
  the 
  periphery 
  of 
  which 
  

   is 
  a 
  whitish 
  band 
  articulated 
  with 
  arrow-headed 
  brown 
  spots 
  : 
  

   with 
  very 
  numerous 
  small 
  ribs, 
  of 
  which 
  the 
  posterior 
  ends 
  only 
  

   remain 
  on 
  the 
  back 
  of 
  the 
  last 
  whorl 
  ; 
  anteriorly 
  with 
  revolv- 
  

   ing 
  striae 
  : 
  apex 
  acute 
  : 
  spire 
  conic 
  : 
  whorls 
  eight, 
  scarcely 
  con- 
  

   vex, 
  with 
  the 
  suture 
  distinctly 
  impressed: 
  aperture 
  narrow: 
  

   labrum 
  variciform, 
  rather 
  sharp 
  edged, 
  thickened 
  behind, 
  a 
  lit- 
  

   tle 
  sinuate 
  posteriorly, 
  with 
  a 
  few 
  granules 
  inside 
  : 
  columellar 
  

   lip 
  nearly 
  smooth. 
  

  

  Mean 
  divergence 
  about 
  37°: 
  length 
  .3 
  inch; 
  breadth 
  .125 
  

   inch 
  : 
  length 
  of 
  spire 
  .2 
  inch. 
  

  

  Var. 
  with 
  the 
  color 
  nearly 
  uniform 
  dingy 
  brown. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

  

  We 
  were 
  indebted 
  to 
  the 
  hermit 
  crabs 
  for 
  7 
  specimens. 
  

  

  89. 
  Colunibella 
  guttata. 
  

  

  Synonymy. 
  

  

  Columhella 
  guttata 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  118. 
  June 
  1832. 
  

  

  Mull. 
  Synop. 
  Nov. 
  Test. 
  Viv. 
  p. 
  88. 
  May 
  1836. 
  

  

  cniraria 
  Sowb. 
  (non 
  Lam.) 
  Thes. 
  Conch, 
  p. 
  129. 
  

  

  No, 
  51. 
  pi. 
  38. 
  f. 
  112. 
  ----- 
  1844. 
  

  

  Mr. 
  Sowerby, 
  having 
  relinquished 
  the 
  species, 
  has 
  re-used 
  

   the 
  name 
  for 
  quite 
  a 
  different 
  species, 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  

   p. 
  50. 
  Mar. 
  1844, 
  and 
  in 
  Thes. 
  Conch, 
  p. 
  131. 
  pi. 
  39. 
  £ 
  124.* 
  

  

  * 
  In 
  his 
  Index 
  this 
  species 
  is 
  called 
  C. 
  punctata. 
  

   JULY, 
  1852, 
  30 
  Ann. 
  Lyc. 
  Nat. 
  Hist. 
  

  

  