﻿ARCA. 
  Panama 
  Shells. 
  485 
  

  

  420. 
  Area 
  ReeTeana. 
  

  

  Synonymy. 
  

  

  Area 
  Helblingii 
  Reeve 
  (non 
  Brug.) 
  Conch. 
  Icon. 
  spec. 
  

  

  90 
  pars. 
  pi. 
  14. 
  f. 
  90 
  ? 
  - 
  - 
  - 
  Apr. 
  1844. 
  

   Reeveana 
  Orb. 
  Voy. 
  Amer. 
  Merid. 
  Moll. 
  p. 
  635. 
  1846. 
  

  

  Station. 
  — 
  Under 
  stones 
  at 
  low 
  water 
  ; 
  Cuming 
  ! 
  Reeve. 
  

   Our 
  specimens 
  were 
  found 
  in 
  the 
  same 
  situation. 
  

  

  Habitat. 
  — 
  St. 
  Elena, 
  Monte 
  Christi 
  ; 
  Cuming 
  ! 
  Reeve. 
  

   Payta; 
  Fontaine! 
  Orbigny. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   9 
  specimens 
  were 
  collected 
  : 
  one 
  of 
  them 
  is 
  nearly 
  4 
  inches 
  

   long. 
  Mr. 
  Reeve 
  mentions 
  also 
  I. 
  Corregidor, 
  Philippines, 
  

   where 
  probably 
  the 
  true 
  A. 
  Helblingii 
  was 
  obtained. 
  

  

  421. 
  Area 
  reversa. 
  

  

  Synonymy. 
  

  

  Area 
  reversa 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  20. 
  Feb. 
  1833. 
  

  

  Miill. 
  Syn. 
  Test. 
  Viv. 
  p. 
  180. 
  1836. 
  

  

  hemicardium 
  Koch, 
  in 
  Phil. 
  Abbild. 
  I. 
  pi. 
  1. 
  f. 
  1. 
  Mar. 
  1843. 
  

  

  reversa 
  Reeve 
  Conch. 
  Icon. 
  pi. 
  1. 
  f. 
  5. 
  Dec. 
  1843. 
  

  

  Orb. 
  Voy. 
  Amer. 
  Merid. 
  Moll. 
  p. 
  635. 
  1846. 
  

  

  Station. 
  — 
  Soft 
  mud, 
  at 
  the 
  depth 
  of 
  7 
  fathoms 
  ; 
  Cuming 
  ! 
  

   Sowerby 
  : 
  also 
  Reeve. 
  

  

  Habitat 
  — 
  Tumbez 
  ; 
  Cuming 
  ! 
  Sowerby 
  : 
  also 
  Reeve 
  : 
  also 
  

   Orbigny. 
  

  

  Unknown 
  : 
  Koch. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   4 
  odd 
  valves 
  were 
  found. 
  

  

  422. 
  Area 
  similis. 
  Nov. 
  sp. 
  

  

  Shell 
  ellipsoidal, 
  very 
  inequilateral, 
  slightly 
  auriculate 
  : 
  infe- 
  

   rior 
  margin 
  subrectilinear 
  ; 
  anterior 
  and 
  posterior 
  margins 
  well 
  

  

  