﻿372 
  Panama 
  Shells. 
  muricid^. 
  

  

  spire 
  witli 
  tlie 
  outlines 
  nearly 
  rectilinear 
  : 
  whorls 
  eight, 
  convex, 
  

   with 
  a 
  moderately 
  impressed 
  suture 
  : 
  aperture 
  rather 
  narrow 
  : 
  

   labrum 
  rather 
  sharp, 
  thickened 
  behind 
  the 
  edge 
  by 
  a 
  very 
  

   stout 
  rib 
  : 
  canal 
  rather 
  wide, 
  very 
  short. 
  

  

  Mean 
  divergence 
  about 
  33" 
  ; 
  length 
  .3 
  inch 
  ; 
  breadth 
  

   .1 
  inch 
  ; 
  length 
  of 
  spire 
  .2 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  C. 
  B. 
  A. 
  1 
  

  

  13 
  specimens 
  were 
  found 
  in 
  the 
  calcareous 
  sand 
  on 
  the 
  

   shore. 
  

  

  184. 
  Pleurotoiua 
  zonulata. 
  

  

  Synonymy. 
  

  

  PleuTotoma 
  cincta 
  Sowb, 
  (non 
  Lam.) 
  in 
  Proc. 
  Zool. 
  Soc. 
  

  

  Lond. 
  p. 
  136. 
  - 
  - 
  . 
  - 
  Dec. 
  1833. 
  

  

  zonulata 
  Reeve 
  Conch. 
  Syst. 
  pi. 
  234. 
  f. 
  10. 
  1842. 
  

  

  Reeve 
  Conch. 
  Icon. 
  pi. 
  6. 
  f. 
  39. 
  Feb. 
  1843. 
  

  

  The 
  name 
  given 
  by 
  Mr. 
  Sowerby 
  was 
  pre-occupied 
  by 
  

   Lamarck. 
  

  

  Station. 
  — 
  Sand 
  and 
  gravel 
  at 
  a 
  depth 
  of 
  7 
  fathoms 
  ; 
  Cuming 
  ! 
  

   Sowerby 
  : 
  also 
  Eeeve. 
  

  

  Habitat. 
  — 
  Monte 
  Christi 
  and 
  Xipixapi 
  ; 
  Cuming 
  ! 
  Sowerby 
  : 
  

   also 
  Reeve. 
  

   Panama; 
  C. 
  B. 
  A.! 
  

   Two 
  specimens 
  were 
  obtained. 
  

  

  Of 
  each 
  of 
  the 
  following 
  species 
  we 
  obtained 
  but 
  one 
  speci- 
  

   men 
  in 
  a 
  more 
  or 
  less 
  imperfect 
  condition. 
  They 
  were 
  found 
  

   near 
  Panama, 
  mostly 
  in 
  the 
  calcareous 
  sand. 
  

  

  185. 
  Pleurotoiua 
  a. 
  

  

  186. 
  Pleurotoma 
  b. 
  

  

  187. 
  mangrelia 
  c. 
  

  

  