﻿CREPIDULA. 
  Panama 
  Shells. 
  457 
  

  

  these 
  writers 
  are 
  correct, 
  we 
  ouglit 
  to 
  find 
  the 
  characters 
  always 
  

   graduating 
  into 
  those 
  of 
  other 
  species, 
  according 
  to 
  the 
  position 
  

   of 
  the 
  shell. 
  

  

  Habitat 
  — 
  Ilva 
  ; 
  Gualteri. 
  

  

  Seas 
  of 
  Barbary 
  ; 
  Linn^us 
  : 
  also 
  Gmelin 
  : 
  also 
  

  

  Lamarck. 
  

   In 
  nearly 
  all 
  the 
  Mediterranean 
  ; 
  Deshayes. 
  

   Mediterranean 
  ; 
  Jay. 
  

   Bays 
  of 
  Tunis 
  and 
  Algiers 
  ; 
  McAndrew 
  ! 
  

   Sicily; 
  C. 
  B. 
  A. 
  

   Mediterranean 
  and 
  Seas 
  of 
  Senegal; 
  Potiez 
  and 
  

  

  Midland. 
  

   Maine; 
  Mighels! 
  

  

  Massachusetts 
  ; 
  Gould 
  ! 
  also 
  C. 
  B. 
  A. 
  ! 
  

   New 
  York 
  harbor 
  ; 
  C. 
  M. 
  Wheatley 
  ! 
  

   New 
  Jersey 
  ; 
  Say. 
  

   Maryland, 
  Carolina, 
  Georgia, 
  and 
  East 
  Florida; 
  

  

  Say! 
  

   Jamaica 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   I. 
  of 
  Chiloe 
  and 
  Panama 
  ; 
  Cuming 
  ! 
  Broderip 
  ; 
  

  

  also 
  Miiller. 
  

   Panama 
  ; 
  C. 
  B. 
  A, 
  ! 
  

   In 
  the 
  United 
  States, 
  Maine 
  appears 
  to 
  be 
  the 
  northern 
  limit 
  

   of 
  the 
  species 
  : 
  Dr. 
  Mighels 
  says, 
  " 
  I 
  have 
  never 
  found 
  but 
  one 
  

   individual 
  of 
  this 
  species 
  in 
  Casco 
  Bay 
  [Maine] 
  ; 
  this 
  had 
  

   located 
  itself 
  within 
  the 
  mouth 
  of 
  a 
  dead 
  Buccinum, 
  undatumy 
  

   In 
  Massachusetts, 
  we 
  have 
  only 
  found 
  one 
  specimen 
  north 
  

   of 
  Cape 
  Cod 
  ; 
  this 
  was 
  on 
  Chelsea 
  Beach. 
  But 
  south 
  of 
  Cape 
  

   Cod 
  the 
  species 
  is 
  common. 
  In 
  Jamaica, 
  it 
  is 
  common 
  in 
  the 
  

   Bay 
  of 
  Port 
  Royal. 
  At 
  Panama 
  we 
  collected 
  35 
  specimens. 
  

   This 
  species 
  is 
  thus 
  found 
  to 
  inhabit 
  the 
  following 
  distinct 
  

   marine 
  zoological 
  provinces 
  : 
  — 
  

  

  1. 
  The 
  Mediterranean. 
  

  

  2. 
  East 
  side 
  of 
  North 
  America, 
  north 
  of 
  Cape 
  Cod. 
  

  

  3. 
  " 
  " 
  " 
  " 
  middle 
  regions. 
  

  

  JULY, 
  1852. 
  39 
  Ann. 
  Ltc. 
  Nat. 
  Hist. 
  

  

  