﻿DONAX. 
  Panama 
  Shells, 
  501 
  

  

  whicli 
  is 
  smaller 
  and 
  higher, 
  at 
  a 
  depth 
  of 
  5 
  fathoms 
  in 
  thin 
  

   mud 
  ; 
  Cuming 
  ! 
  Sowerby. 
  

  

  The 
  only 
  living 
  specimen 
  which 
  we 
  found 
  was 
  buried 
  one 
  or 
  

   two 
  inches 
  deep 
  in 
  sand, 
  on 
  a 
  sandy 
  flat, 
  near 
  low 
  water 
  mark. 
  

  

  Habitat. 
  — 
  Gulf 
  of 
  Nicoya 
  ; 
  Cuming 
  ! 
  Sowerby 
  : 
  also 
  Miiller. 
  

  

  Tumbez 
  (for 
  the 
  var. 
  above 
  mentioned) 
  ; 
  Cuming 
  ! 
  

   Sowerby 
  : 
  also 
  Miiller. 
  

  

  Peru 
  and 
  Central 
  America 
  ; 
  Hanley. 
  

  

  Punta 
  St. 
  Elena 
  ; 
  Jay. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   3 
  specimens 
  were 
  obtained. 
  

  

  454. 
  Donax 
  a^similis. 
  

  

  jSynonymy. 
  

   Donax 
  assimilis 
  Hanley 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  17. 
  Mar. 
  1845. 
  

  

  Station. 
  — 
  At 
  about 
  three 
  quarters 
  tide 
  level, 
  buried 
  a 
  few 
  

   inches 
  deep 
  in 
  sand. 
  It 
  is 
  frequently 
  used 
  for 
  food 
  by 
  the 
  

   inhabitants. 
  The 
  regard 
  which 
  these 
  mollusks 
  have 
  to 
  a 
  deter- 
  

   minate 
  level, 
  was 
  shown 
  by 
  a 
  method 
  for 
  finding 
  them, 
  which 
  

   was 
  employed 
  by 
  a 
  negro 
  woman, 
  who 
  was 
  seen 
  several 
  times 
  

   collecting 
  them. 
  Beginning 
  below 
  the 
  level 
  where 
  they 
  might 
  

   be 
  found, 
  the 
  sand 
  was 
  scooped 
  up 
  with 
  a 
  calabash, 
  in 
  a 
  line 
  

   running 
  up 
  the 
  beach, 
  until 
  the 
  shells 
  were 
  found. 
  Then 
  by 
  

   keeping 
  to 
  this 
  level, 
  every 
  calabash 
  full 
  of 
  sand 
  yielded 
  more 
  

   or 
  less 
  of 
  the 
  Donax. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  Hanley. 
  

  

  Mazatlan 
  ; 
  Lt. 
  Green 
  ! 
  Mus. 
  Essex 
  Insl^ 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  I 
  

   350 
  specimens 
  were 
  collected. 
  

  

  455. 
  Donax 
  g^racilis. 
  

  

  Synonymy. 
  

   Donax 
  gracilis 
  Hanley 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  15. 
  Feb. 
  1846. 
  

  

  