﻿274 
  Panama 
  Shells. 
  

  

  PURPURID^. 
  

  

  resembles 
  a 
  variety 
  of 
  the 
  same 
  species, 
  which 
  Mr. 
  Redfield 
  

   has 
  received 
  from 
  Carthagena. 
  But 
  figs. 
  16d 
  and 
  IGg" 
  re- 
  

   present 
  the 
  kindred 
  type 
  of 
  the 
  Pacific 
  shore. 
  This 
  we 
  sup- 
  

   pose 
  to 
  be 
  O. 
  araneosa 
  of 
  Lamarck. 
  The 
  difference 
  between 
  

   the 
  Caribbean 
  and 
  the 
  Pacific 
  types 
  is 
  somewhat 
  less 
  in 
  value 
  

   than 
  the 
  average 
  difference 
  between 
  species. 
  But 
  we 
  have 
  

   elsewhere 
  shown, 
  (Cont. 
  Conch, 
  p. 
  191,) 
  that 
  it 
  is 
  impossible 
  

   to 
  make 
  all 
  the 
  species 
  of 
  exactly 
  equal 
  value. 
  Those 
  figures 
  

   on 
  Mr. 
  Reeve's 
  pi. 
  X, 
  which 
  we 
  have 
  not 
  before 
  referred 
  to 
  in 
  

   this 
  paragraph, 
  represent 
  probably 
  one 
  or 
  two 
  other 
  species 
  of 
  

   the 
  Pacific 
  coast. 
  

  

  In 
  consequence 
  of 
  this 
  union 
  of 
  distinct 
  types, 
  Mr. 
  R. 
  gives 
  

   as 
  the 
  liabitat 
  of 
  O. 
  reticularis, 
  " 
  Gulf 
  of 
  California; 
  Donnet. 
  

   I. 
  of 
  Grranada, 
  West 
  Indies 
  ; 
  J. 
  Cuming." 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  South 
  Seas? 
  Lamarck. 
  

  

  Bay 
  of 
  Panama; 
  C. 
  B. 
  A. 
  ! 
  

   In 
  the 
  fruit 
  shanty 
  we 
  found 
  1 
  specimen, 
  in 
  company 
  

   with 
  other 
  shells, 
  all 
  of 
  which 
  had 
  been 
  taken 
  near 
  Panama. 
  

  

  34. 
  Oliva 
  iiicoaispiciia. 
  Nov. 
  sp. 
  

  

  Shell 
  rather 
  slender 
  : 
  white 
  : 
  smooth 
  : 
  spire 
  about 
  as 
  long 
  

   as 
  the 
  aperture 
  : 
  apex 
  rather 
  obtuse 
  : 
  whorls 
  six, 
  with 
  a 
  well 
  

   impressed 
  suture, 
  slightly 
  convex 
  : 
  aperture 
  acuminate 
  in 
  the 
  

   upper 
  half, 
  subrectangular 
  in 
  the 
  lower 
  half: 
  labrum 
  thin 
  : 
  

   anterior 
  notch 
  very 
  slight, 
  wide. 
  

  

  Mean 
  divergence 
  about 
  30° 
  ; 
  in 
  another 
  specimen 
  nearly 
  

   40° 
  ; 
  length 
  .15 
  inch 
  ; 
  breadth 
  .055 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

  

  "We 
  obtained 
  only 
  3 
  mature 
  specimens 
  and 
  one 
  immature, 
  

   in 
  picking 
  over 
  several 
  quarts 
  of 
  fine 
  drift 
  materials 
  gathered 
  

   on 
  the 
  shore 
  near 
  the 
  city 
  wall. 
  

  

  