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  Panama 
  Shells. 
  cvpRiEiD^. 
  

  

  more 
  important 
  difference 
  is 
  in 
  its 
  form, 
  whicli 
  is 
  scarcely 
  dis- 
  

   tinguishable 
  from 
  that 
  of 
  C. 
  exantliema. 
  Although 
  there 
  is 
  a 
  

   prevailing 
  ty)3e 
  of 
  coloring 
  in 
  each 
  of 
  these 
  three 
  species, 
  it 
  is 
  

   rather 
  less 
  constant 
  than 
  the 
  form, 
  so 
  that 
  C. 
  cervinetia 
  is 
  some- 
  

   times 
  liable 
  to 
  be 
  confounded 
  with 
  C. 
  exanthema, 
  until 
  we 
  ob- 
  

   serve 
  the 
  aperture, 
  which 
  is 
  like 
  that 
  of 
  C. 
  cervina. 
  The 
  latter 
  

   is 
  ventricose, 
  rather 
  thinner, 
  with 
  the 
  aperture 
  dilated 
  anteri- 
  

   orly 
  ; 
  C. 
  cervinetia 
  is 
  subcylindric, 
  with 
  the 
  aperture 
  as 
  in 
  C. 
  

   cervina 
  : 
  C. 
  exanthema 
  is 
  subcylindric, 
  with 
  the 
  aperture 
  nar- 
  

   row 
  anteriorly, 
  and 
  the 
  right 
  lip 
  more 
  bent 
  upwards 
  anteriorly. 
  

   Station. 
  — 
  At 
  and 
  just 
  above 
  the 
  low 
  water 
  mark 
  of 
  the 
  

   spring 
  tides, 
  this 
  species 
  was 
  found 
  under 
  stones 
  which 
  were 
  

   not 
  less 
  than 
  fifteen 
  or 
  twenty 
  inches 
  in 
  diameter. 
  

  

  Habitat. 
  — 
  Caribbean 
  Sea, 
  and 
  shores 
  of 
  Senegal: 
  Kiener. 
  

  

  Indian 
  Ocean 
  ? 
  Deshayes. 
  

  

  Indian 
  Ocean 
  ; 
  Jay. 
  

  

  Panama, 
  and 
  I. 
  of 
  Taboga: 
  C. 
  B. 
  A 
  ! 
  

   The 
  words 
  of 
  Kiener 
  are 
  " 
  Habite 
  I'ocean 
  des 
  Antilles 
  et 
  

   les 
  Cotes 
  du 
  Senegal." 
  Since 
  no 
  authority 
  is 
  given 
  for 
  this 
  ha- 
  

   bitat, 
  and 
  since 
  gross 
  errors 
  of 
  habitat 
  are 
  coumion 
  in 
  Kiener's 
  

   Iconography, 
  we 
  must 
  be 
  allowed 
  to 
  regard 
  the 
  statement 
  as 
  

   wholly 
  erroneous. 
  Some 
  varieties 
  of 
  C. 
  exanthema., 
  which 
  is 
  

   a 
  Caribbean 
  species, 
  might 
  be 
  mistaken 
  ft)r 
  C. 
  cervin'tta, 
  and 
  

   thus 
  lead 
  to 
  the 
  belief 
  that 
  the 
  latter 
  is 
  also 
  Caribbean. 
  But 
  

   C. 
  exanUiema 
  is 
  exclusively 
  Caribbean 
  ; 
  C. 
  cervinetia 
  we 
  

   believe 
  occurs 
  only 
  in 
  the 
  Panama 
  province, 
  as 
  we 
  have 
  above 
  

   defined 
  this 
  province 
  ; 
  and 
  C. 
  cervu^ 
  probably 
  belongs 
  to 
  the 
  

   Polynesian 
  zoological 
  province. 
  We 
  have 
  indeed 
  received 
  a 
  

   specimen 
  of 
  C. 
  cervinetia 
  from 
  the 
  Sandwich 
  Islands 
  ; 
  but 
  at 
  

   these 
  islands 
  it 
  is 
  a 
  Cf)iiunon 
  custom 
  to 
  collect 
  shells 
  from 
  the 
  

   whale 
  ships. 
  The 
  habitat 
  assigned 
  to 
  the 
  species 
  by 
  Des- 
  

   hayes 
  (copied 
  by 
  Dr. 
  .lay 
  ?) 
  is 
  probably 
  due 
  to 
  hearsay 
  testmony. 
  

   Probably 
  the 
  " 
  C. 
  exanthema'''' 
  found 
  by 
  Mr. 
  Hinds 
  at 
  the 
  

   island 
  of 
  Muerte 
  belongs 
  to 
  this 
  species. 
  

  

  