﻿CERITHIUM. 
  Panama 
  Sheik, 
  377 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  Hinds 
  ! 
  

  

  Taboga; 
  C. 
  B, 
  A,! 
  

   19 
  specimens 
  were 
  collected. 
  

  

  198. 
  Cerithiuni 
  interruptum 
  ? 
  

  

  JSynonymy. 
  

  

  ? 
  Ceritkium 
  interruptum 
  M«nke. 
  Zeitsch. 
  Mai. 
  p. 
  1*78. 
  for 
  

  

  1850. 
  .... 
  Apr. 
  1851. 
  

  

  Our 
  specimens 
  are, 
  for 
  the 
  most 
  part, 
  mucli 
  larger 
  than 
  those 
  

   which 
  Dr. 
  Menke 
  describes. 
  In 
  other 
  respects, 
  they 
  answer 
  to 
  

   his 
  description 
  as 
  nearly 
  as 
  could 
  be 
  expected 
  in 
  a 
  species 
  with 
  

   variable 
  characters. 
  Menke's 
  shell 
  is 
  5.4 
  lines 
  long, 
  and 
  many 
  

   of 
  our 
  specimens 
  are 
  1 
  inch 
  long. 
  

  

  Station. 
  — 
  On 
  and 
  under 
  rocks 
  and 
  stones, 
  between 
  half 
  tide 
  

   level 
  and 
  the 
  low 
  water 
  mark 
  of 
  neap 
  tides. 
  

  

  Haiitat. 
  — 
  ^Mazatlan 
  ; 
  Melchers 
  ! 
  Menke. 
  

  

  Taboga 
  and 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   ■ 
  1100 
  specimens 
  were 
  collected. 
  

  

  199, 
  Cerithinm 
  . 
  Sp. 
  indet 
  

  

  This 
  shell 
  is 
  so 
  nearly 
  related 
  to 
  the 
  preceding 
  that 
  it 
  may 
  be 
  

   a 
  question 
  whether 
  it 
  should 
  rank 
  as 
  a 
  distinct 
  species. 
  It 
  is 
  

   larger, 
  being 
  1.2 
  inch 
  long 
  ; 
  and 
  is 
  wholly 
  black, 
  except 
  the 
  

   eroded 
  apex 
  : 
  it 
  has 
  one 
  series 
  of 
  sharp 
  tubercles, 
  and 
  the 
  spiral 
  

   granular 
  lines 
  are 
  more 
  prominent 
  and 
  more 
  nearly 
  equal 
  than 
  

   in 
  C. 
  interruptum. 
  

  

  Station. 
  — 
  Like 
  that 
  of 
  C. 
  interruptum. 
  

  

  ffahitat.—TsihogSL 
  ; 
  C. 
  B. 
  A. 
  I 
  

  

  Thirty 
  specimens 
  were 
  collected. 
  

  

  JULY, 
  1853. 
  34 
  Amm. 
  Ltc. 
  Mat. 
  Hist. 
  

  

  