﻿396 
  Panama 
  Shells. 
  littokinid^. 
  

  

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

   3,300 
  specimens 
  were 
  collected. 
  

  

  234. 
  liittorina 
  conspersa. 
  

  

  Synonymy. 
  

  

  Littorina 
  conspersa 
  Phil. 
  Abbild. 
  II. 
  pi. 
  4. 
  f. 
  14. 
  March 
  1847. 
  

  

  Some 
  individuals, 
  of 
  a 
  more 
  ventricose 
  form 
  and 
  with 
  

   broader 
  striae, 
  approximate 
  towards 
  L. 
  puncticulata 
  Phil. 
  ; 
  but 
  

   for 
  the 
  most 
  part 
  the 
  two 
  species 
  are 
  easily 
  distinguished. 
  

  

  Station. 
  — 
  This 
  species 
  was 
  found 
  chiefly 
  on 
  large 
  fragments 
  

   of 
  rock 
  at 
  high 
  water 
  mark. 
  

  

  Habitat. 
  — 
  Eeal 
  Llejos 
  ; 
  Philippi. 
  

  

  Taboga 
  and 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   320 
  specimens 
  were 
  collected. 
  

  

  235. 
  liittorina 
  (?) 
  excarata. 
  Nov. 
  sp. 
  

  

  Shell 
  obliquely 
  ellipsoidal 
  : 
  very 
  dark 
  brown 
  at 
  the 
  apex, 
  in 
  

   the 
  umbilical 
  region 
  and 
  in 
  the 
  fauces, 
  otherwise 
  pale 
  horn 
  

   color 
  : 
  with 
  several 
  spiral 
  raised 
  lines, 
  and 
  intermediate 
  very 
  

   minute 
  spiral 
  striae 
  ; 
  apex 
  subacute 
  : 
  spire 
  small, 
  with 
  the 
  out- 
  

   lines 
  very 
  curvilinear 
  : 
  whorls 
  nearly 
  four, 
  compressed, 
  with 
  a 
  

   distinct 
  suture 
  ; 
  last 
  whorl 
  ventricose 
  : 
  aperture 
  subovate 
  : 
  

   labrum 
  very 
  sharp, 
  but 
  thickened 
  much 
  a 
  little 
  behind 
  the 
  

   edge: 
  columella 
  dilated 
  and 
  thickened: 
  region 
  around 
  the 
  

   umbilicus 
  much 
  excavated 
  : 
  umbilicus 
  small. 
  

  

  Mean 
  divergence 
  about 
  90° 
  ; 
  length 
  .17 
  inch 
  ; 
  breadth 
  

   .13 
  inch 
  ; 
  length 
  of 
  spire 
  .04 
  inch. 
  

  

  The 
  generic 
  character 
  of 
  this 
  species 
  is 
  doubtful. 
  It 
  resem- 
  

   bles 
  a 
  small 
  Narica. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

  

  1 
  specimen 
  was 
  found 
  in 
  the 
  sand. 
  

  

  