﻿416 
  Panama 
  Shells. 
  TROCHID^. 
  

  

  centric 
  lines: 
  with 
  many 
  elevated 
  granulous 
  spiral 
  lines, 
  of 
  

   whicli 
  tliree 
  larger 
  are 
  next 
  above 
  the 
  suture 
  : 
  spire 
  with, 
  the 
  

   outlines 
  nearly 
  rectilinear 
  : 
  apex 
  acute 
  : 
  whorls 
  nine, 
  planulate 
  

   or 
  concave 
  next 
  below 
  the 
  suture, 
  very 
  convex 
  or 
  suban- 
  

   gular 
  next 
  above 
  the 
  suture, 
  which 
  is 
  moderately 
  impressed 
  ; 
  

   last 
  whorl 
  subplanulate 
  anteriorly 
  : 
  aperture 
  subquadrate 
  : 
  

   labrum 
  thin 
  : 
  columella 
  obliquely 
  produced, 
  nearly 
  straight: 
  

   umbilicus 
  wanting. 
  

  

  Mean 
  divergence 
  about 
  60° 
  ; 
  length 
  .48 
  inch 
  ; 
  greatest 
  

   breadth 
  .44 
  inch 
  ; 
  least 
  breadth 
  .4 
  inch. 
  

  

  Station. 
  — 
  Under 
  stones 
  at 
  low 
  water 
  mark. 
  

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

  

  7 
  specimens 
  were 
  collected 
  on 
  the 
  reef. 
  We 
  have 
  named 
  

   this 
  pretty 
  species 
  in 
  honor 
  of 
  Isaac 
  Lea, 
  Esq., 
  of 
  Philadelphia- 
  

  

  2*76. 
  Tro(!liiiis 
  lima. 
  

  

  Synonymy. 
  

  

  Trochus 
  lima 
  Pliil. 
  in 
  Zeitsclir. 
  f. 
  Malak. 
  vol. 
  for 
  1849. 
  

  

  p. 
  159. 
  Mar. 
  1850. 
  

  

  Phil, 
  in 
  Kiist. 
  Conch. 
  Cab. 
  pi. 
  44. 
  f. 
  15. 
  185a 
  

  

  Station. 
  — 
  Under 
  stones, 
  between 
  the 
  low 
  water 
  mark 
  of 
  the 
  

   spring 
  tides 
  and 
  that 
  of 
  the 
  neap 
  tides. 
  

   Habitat. 
  — 
  Unknown 
  ; 
  Philippi. 
  

  

  Santa 
  Barbara 
  ; 
  E. 
  Jewett 
  ! 
  Gould 
  MSS. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   We 
  collected 
  75 
  specimens 
  on 
  the 
  reef. 
  

  

  277. 
  Trochiiis 
  liTidus. 
  

  

  Synonymy. 
  

  

  Trochus 
  lividus 
  Phil, 
  in 
  ZeitscLr. 
  f. 
  Malak. 
  vol. 
  for 
  1849, 
  

  

  p. 
  168. 
  ------ 
  Mar. 
  185(>. 
  

  

  Phil, 
  in 
  Kiist. 
  Conch. 
  Cab. 
  pi. 
  45. 
  f. 
  8. 
  1850. 
  

  

  This 
  species 
  belongs 
  to 
  the 
  subgenus 
  Modulus. 
  

  

  