﻿ARCA. 
  Panama 
  Shells. 
  483 
  

  

  Station. 
  — 
  Attached 
  to 
  stones 
  ; 
  Cuming 
  ! 
  Eeeve. 
  

  

  Our 
  specimens 
  were 
  found 
  under 
  stones 
  near 
  low 
  water 
  mark. 
  

  

  Habitat. 
  — 
  Mazatlan 
  ; 
  Broderip 
  : 
  also 
  Beecliey's 
  Voyage. 
  

  

  St. 
  Elena 
  ; 
  Cuming 
  ! 
  Eeeve 
  : 
  also 
  Orbigny. 
  

  

  St. 
  Elena 
  ; 
  Jay. 
  

  

  Mexico 
  ; 
  Hanley. 
  

  

  Santa 
  Barbara 
  ; 
  E. 
  Jewett 
  ! 
  Gould 
  MSS. 
  

  

  Taboga 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   3 
  specimens 
  were 
  found. 
  

  

  417. 
  Area 
  g^randis. 
  

  

  Synonymy. 
  

  

  Area 
  grandis 
  Brod. 
  et 
  Sowb. 
  in 
  Zool. 
  Jour. 
  IV. 
  365. 
  1829. 
  

  

  Reeve 
  Conch. 
  Icon. 
  pi. 
  1. 
  f. 
  4. 
  Dec. 
  1843. 
  

  

  Hanley 
  Descr. 
  Catal. 
  p. 
  160. 
  1845 
  ? 
  

  

  Orb. 
  Voy. 
  Amer. 
  Merid. 
  Moll. 
  p. 
  637. 
  1846. 
  

  

  Station. 
  — 
  Our 
  specimens 
  were 
  found 
  balf 
  buried 
  in 
  mud 
  and 
  

   small 
  alg^, 
  under 
  trees, 
  a 
  little 
  above 
  half 
  tide 
  level. 
  

  

  Habitat. 
  — 
  Unknown; 
  Broderip. 
  

  

  Eeal 
  Llejos, 
  Bay 
  of 
  Guayaquil, 
  &c., 
  Western 
  Coast 
  

  

  of 
  S. 
  America 
  ; 
  Cuming 
  ! 
  also 
  Hinds 
  ! 
  Eeeve, 
  

   Guayaquil; 
  Fontaine! 
  Orbigny. 
  

   Panama; 
  Jay. 
  

   Panama 
  : 
  C. 
  B. 
  A. 
  ! 
  

   13 
  specimens 
  were 
  obtained. 
  This 
  species 
  is 
  used 
  by 
  the 
  

   natives 
  for 
  food. 
  A 
  single 
  valve 
  taken 
  from 
  a 
  heap 
  of 
  the 
  

   shells 
  of 
  edible 
  mollusks 
  weighs 
  2* 
  lbs. 
  

  

  418. 
  Area 
  miitabilis. 
  

  

  Synonymy. 
  

  

  Byssoarca 
  mutabilis 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  17. 
  Feb. 
  1833. 
  

  

  Area 
  Reeve 
  Concli. 
  Icon. 
  pi. 
  13. 
  f. 
  85. 
  Apr. 
  1844. 
  

  

  Hanley 
  Descr. 
  Catal. 
  p. 
  156. 
  1845? 
  

  

  