﻿320 
  Panama 
  Shells. 
  purpueid.e. 
  

  

  in 
  C. 
  nigricans 
  a 
  revolving 
  impressed 
  line 
  cuts 
  the 
  posterior 
  

   ends 
  of 
  the 
  ribs. 
  

  

  98. 
  Columbella 
  parTa. 
  

  

  Synonymy. 
  

  

  Columbella 
  2}arva 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  52. 
  Mar. 
  1844. 
  

  

  Sowb. 
  Thes. 
  Conch, 
  p. 
  142. 
  No. 
  83. 
  pi. 
  40. 
  

  

  f. 
  lYO. 
  - 
  - 
  - 
  1844. 
  

  

  Station. 
  — 
  Under 
  stones 
  ; 
  Cuming 
  ! 
  Sowerby. 
  

  

  Habitat. 
  — 
  Monte 
  Christi 
  ; 
  Cuming 
  ! 
  Sowerby. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  We 
  found 
  only 
  one 
  specimen. 
  

  

  99. 
  Columbella 
  pulchrior. 
  Nov. 
  sp. 
  

  

  Shell 
  rather 
  long 
  ovate 
  : 
  with 
  a 
  whitish 
  revolving 
  band 
  next 
  

   below 
  the 
  suture 
  articulated 
  with 
  large 
  spots 
  of 
  a 
  dark 
  slate 
  

   color 
  ; 
  with 
  a 
  translucent 
  ground 
  of 
  pale 
  yellowish 
  brown, 
  on 
  

   which 
  are 
  placed 
  in 
  quincunx 
  order 
  rather 
  numerous, 
  exces- 
  

   sively 
  minute 
  sharply 
  defined 
  dots 
  of 
  reddish 
  brown 
  ; 
  with 
  one 
  

   or 
  two 
  large 
  irregular 
  spots 
  of 
  dark 
  brown 
  near 
  the 
  end 
  of 
  the 
  

   last 
  whorl 
  : 
  surface 
  smooth 
  and 
  shining 
  : 
  apex 
  acute 
  : 
  spire 
  

   conic 
  : 
  whorls 
  six 
  or 
  seven, 
  scarcely 
  convex, 
  with 
  the 
  suture 
  

   lightly 
  impressed 
  : 
  aperture 
  narrow 
  : 
  labrum 
  rather 
  sharp, 
  

   thickened 
  behind, 
  with 
  a 
  few 
  granules 
  inside 
  : 
  columellar 
  lip 
  

   nearly 
  smooth. 
  

  

  Mean 
  divergence 
  about 
  45° 
  ; 
  length 
  .15 
  inch 
  ; 
  breadth 
  .07 
  

   inches 
  ; 
  length 
  of 
  spire 
  .075 
  inches. 
  

  

  Station. 
  — 
  Under 
  stones 
  near 
  low 
  water 
  mark. 
  

  

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

  

  "We 
  found 
  of 
  this 
  rare 
  and 
  elegant 
  little 
  shell 
  only 
  5 
  speci- 
  

   mens. 
  

  

  