﻿CERITHIUM. 
  Panama 
  Shells. 
  379 
  

  

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

   33 
  specimens 
  were 
  collected. 
  

  

  202. 
  Cerithium 
  Pacificum. 
  

  

  Synonymy. 
  

  

  Cerithium 
  Pacificum 
  Sowb. 
  Genera. 
  No. 
  42. 
  f. 
  9. 
  1824. 
  

  

  - 
  Humholdti 
  Valenc. 
  in 
  Humb. 
  Rec. 
  Obs. 
  II. 
  280. 
  1833. 
  

  

  Kiener 
  Iconog. 
  p. 
  83. 
  pi. 
  26. 
  f. 
  2. 
  

  

  Pacificum 
  Reeve 
  Conch. 
  Syst. 
  pi. 
  236. 
  f. 
  9. 
  1842. 
  

  

  Kiener 
  ascribes 
  priority 
  to 
  the 
  description 
  by 
  Valenciennes 
  in 
  

   Humb. 
  Kec. 
  Obs. 
  The 
  second 
  volume 
  of 
  Humboldt's 
  work, 
  in 
  

   which 
  the 
  Mollusca 
  are 
  described, 
  bears 
  the 
  date 
  1833. 
  ^ 
  

   Station. 
  — 
  Unknown. 
  

  

  Habitat— 
  QvimdiViS, 
  ; 
  Humboldt 
  & 
  Bonpland 
  ! 
  Valenciennes. 
  

   Cumana; 
  Kiener. 
  

   Panama 
  ; 
  Jay. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  1 
  specimen 
  only 
  was 
  found. 
  

  

  203. 
  Cerithium 
  paiiperculum. 
  Nov. 
  sp. 
  

  

  Shell 
  slender 
  : 
  pale 
  horn 
  color 
  : 
  with 
  several 
  spiral 
  keels, 
  of 
  

   which 
  five 
  are 
  visible 
  on 
  the 
  spire, 
  with 
  many 
  transverse 
  ridges 
  

   on 
  the 
  upper 
  whorls, 
  which 
  are 
  reduced 
  to 
  raised 
  lines 
  on 
  the 
  

   lower 
  whorls, 
  with 
  the 
  intersections 
  slightly 
  granulous 
  ; 
  ante- 
  

   riorly 
  the 
  spiral 
  ridges 
  are 
  obsolete: 
  apex 
  acute: 
  spire 
  with 
  

   the 
  outlines 
  nearly 
  rectilinear 
  : 
  whorls 
  eight, 
  slightly 
  convex, 
  

   with 
  a 
  moderately 
  impressed 
  suture 
  ; 
  last 
  whorl 
  rather 
  long 
  : 
  

   aperture 
  long, 
  acute 
  above, 
  with 
  a 
  small 
  umbilical 
  chink 
  : 
  canal 
  

   very 
  short. 
  

  

  Mean 
  divergence 
  about 
  18° 
  ; 
  length 
  .13 
  inch 
  ; 
  breadth 
  M 
  

   inch 
  ; 
  length 
  of 
  spire 
  .09 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat—Psiaama, 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  2 
  specimens 
  were 
  found. 
  

  

  