﻿LITTORINA. 
  Panama 
  Shells. 
  399 
  

  

  wliorls 
  nearly 
  six, 
  a 
  little 
  convex, 
  with 
  a 
  distinct 
  suture 
  ; 
  last 
  

   whorl 
  angular 
  : 
  aperture 
  ovate, 
  acute 
  above, 
  slightly 
  effuse 
  : 
  

   columellar 
  lip 
  slightly 
  flattened 
  and 
  dilated. 
  

  

  Mean 
  divergence 
  about 
  55° 
  ; 
  length 
  .25 
  inch 
  ; 
  breadth 
  .17 
  

   inch. 
  

  

  Some 
  of 
  the 
  more 
  strongly 
  striated 
  and 
  colored 
  individuals 
  

   resemble 
  the 
  young 
  of 
  L. 
  aspera, 
  but 
  the 
  spire 
  is 
  always 
  less 
  

   acute. 
  

  

  Station. 
  — 
  In 
  the 
  cavities 
  of 
  a 
  rough 
  ledge 
  of 
  rocks, 
  at 
  and 
  

   above 
  high 
  water 
  mark. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  E. 
  B. 
  Philippi 
  ! 
  Philippi. 
  

  

  Taboga; 
  C. 
  B. 
  A. 
  ! 
  

   600 
  specimens 
  were 
  taken 
  at 
  Taboga. 
  

  

  240. 
  liittorina 
  pulchra. 
  

  

  Synonymy. 
  

  

  Littorina 
  pulchra 
  Sowb. 
  Gen. 
  No. 
  37. 
  f. 
  2, 
  3. 
  1824. 
  

  

  Griff. 
  An. 
  King. 
  Moll. 
  pi. 
  1. 
  f. 
  3. 
  1834. 
  

  

  Turho 
  pulcher 
  Swains. 
  Malac. 
  p. 
  207. 
  f. 
  39. 
  1840. 
  

   Littorina 
  pulchra 
  Reeve 
  Conch. 
  Syst. 
  pi. 
  222. 
  f. 
  23. 
  1842. 
  

   Lam. 
  An. 
  sans 
  Vert. 
  IX. 
  208. 
  No. 
  7. 
  

  

  (Desh.ed.) 
  1843. 
  

  

  Lain. 
  An. 
  sans 
  Vert. 
  IIL 
  Pt. 
  2. 
  p. 
  574. 
  

  

  No. 
  7. 
  (Desh. 
  ed. 
  tert.) 
  - 
  - 
  - 
  1844. 
  

  

  Phil. 
  Abbild. 
  IL 
  pi. 
  1. 
  f. 
  1. 
  Aug. 
  1846. 
  

  

  Reeve 
  Elem. 
  Conch, 
  pi. 
  12. 
  f. 
  60. 
  1848 
  ? 
  

  

  Station. 
  — 
  ^We 
  found 
  this 
  species 
  on 
  mangrove 
  trees, 
  in 
  a 
  very 
  

   dense 
  thicket, 
  which 
  was 
  growing 
  from 
  a 
  soil 
  of 
  black 
  unctuous 
  

   mud 
  a 
  little 
  below 
  high 
  water 
  mark. 
  

  

  Habitat. 
  — 
  Unknown 
  ; 
  Deshayes. 
  

  

  " 
  Panama, 
  West 
  coast 
  of 
  Columbia 
  ;" 
  Philippi. 
  

   Pacific 
  ; 
  Jay. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  