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  Panama 
  Shells. 
  introduction 
  

  

  this 
  gentleman 
  to 
  the 
  Philippines. 
  Subsequently 
  more 
  of 
  them 
  

   have^appeared 
  in 
  the 
  Proceedings 
  of 
  the 
  same 
  Society, 
  in 
  Sow- 
  

   erby's 
  Thesaurus 
  Conchyliorum, 
  and 
  especially 
  in 
  Reeve's 
  

   Conchologia 
  Iconica. 
  In 
  these 
  last 
  two 
  works, 
  we 
  find 
  the 
  habi- 
  

   tats 
  of 
  all, 
  and 
  the 
  stations 
  of 
  most 
  of 
  the 
  species 
  collected 
  

   by 
  Mr. 
  Cuming, 
  so 
  far 
  as 
  the 
  genera 
  have 
  been 
  mono- 
  

   graphed. 
  

  

  The 
  laborious 
  and 
  productive 
  travels 
  of 
  the 
  Che 
  v. 
  Alcide 
  

   D'Orbigny 
  during 
  the 
  years 
  1826-33, 
  comprise 
  a 
  portion 
  of 
  

   this 
  zoological 
  province. 
  In 
  July 
  1833, 
  this 
  gentleman 
  

   reached 
  the 
  Pacific 
  coast 
  at 
  Arioa 
  by 
  a 
  journey 
  across 
  

   the 
  Andes. 
  Embarking 
  thence 
  on 
  the 
  25th, 
  he 
  stopped 
  

   at 
  Cobijo, 
  Islay, 
  Areqnipa, 
  and 
  Callao. 
  Re-imbarking 
  

   here, 
  this 
  industrious 
  traveller 
  returned 
  to 
  Europe 
  by 
  way 
  

   of 
  Valparaiso. 
  

  

  In 
  the 
  large 
  quarto 
  which 
  D'Orbigny 
  has 
  devoted 
  to 
  the 
  

   Mollusca 
  of 
  South 
  America, 
  numerous 
  species 
  of 
  shells 
  are 
  

   described 
  from 
  the 
  four 
  marine 
  faunae. 
  Among 
  them 
  are 
  

   many 
  which 
  were 
  collected 
  by 
  M. 
  Fontaine, 
  and 
  by 
  Mr. 
  

   Cuming, 
  and 
  others. 
  The 
  tropical 
  and 
  the 
  temperate 
  marine 
  

   faunsB 
  of 
  the 
  west 
  and 
  east 
  sides 
  are 
  shown 
  to 
  be 
  entirely 
  

   distinct 
  in 
  respect 
  of 
  the 
  Mollusca, 
  of 
  which 
  628 
  species 
  are 
  

   enumerated, 
  there 
  being 
  only 
  one 
  species 
  common 
  to 
  any 
  two 
  

   of 
  these 
  provinces. 
  But 
  it 
  is 
  conjectured 
  that 
  collections 
  

   made 
  near 
  the 
  southern 
  extremity 
  of 
  the 
  continent 
  on 
  both 
  

   sides 
  might 
  show 
  that 
  several 
  species 
  are 
  there 
  common 
  to 
  

   the 
  Atlantic 
  and 
  Pacific 
  faunse. 
  The 
  species 
  common 
  to 
  

   both 
  sides 
  is 
  Siphonaria 
  Lessoni, 
  found 
  at 
  Montevideo 
  and 
  

   at 
  Callao. 
  Other 
  species, 
  however, 
  are 
  said, 
  in 
  the 
  body 
  of 
  the 
  

   work, 
  to 
  inhabit 
  both 
  sides 
  of 
  thecontment, 
  as 
  Bulla 
  slruita. 
  

   But 
  in 
  this 
  case, 
  analogous 
  species 
  may 
  have 
  been 
  confounded. 
  

   Since 
  Dr. 
  Philippi 
  has 
  shown 
  that 
  several 
  species 
  had 
  been 
  

   confounded 
  under 
  this 
  name, 
  the 
  specific 
  types 
  are 
  found 
  to 
  

   be 
  as 
  local 
  as 
  most 
  species 
  are. 
  D'Orbigny 
  is 
  one 
  of 
  the 
  very 
  

  

  