﻿474 
  Panama 
  Shells. 
  MYTILID^. 
  

  

  these 
  are 
  identical 
  witli 
  tlie 
  species 
  whicli 
  occurs 
  abundantly 
  in 
  

   some 
  parts 
  of 
  tlie 
  Bay 
  of 
  Panama, 
  and 
  from 
  whicli 
  pearls 
  are 
  

   procured. 
  

  

  892. 
  Avicula 
  sterna. 
  

  

  Synonymy. 
  

  

  Avicula 
  sterna 
  Gould 
  Proc. 
  Post. 
  Soc. 
  Nat. 
  Hist. 
  p. 
  93. 
  Nov. 
  1851. 
  

  

  Station. 
  — 
  Attached 
  to 
  a 
  small 
  species 
  of 
  Gorgona, 
  at 
  the 
  low- 
  

   water 
  mark 
  of 
  the 
  spring 
  tides. 
  

  

  Eahitat. 
  — 
  Panama 
  ; 
  E. 
  Jewett 
  I 
  Gould 
  MSS. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   10 
  specimens 
  were 
  collected 
  on 
  the 
  reef 
  

  

  393. 
  Perna 
  • 
  Sp. 
  indet. 
  a. 
  

  

  Station. 
  — 
  Under 
  stones 
  and 
  in 
  the 
  crevices 
  of 
  rocks 
  at 
  low 
  

   water 
  mark. 
  

  

  Habitat. 
  — 
  La 
  Paz 
  ; 
  Lt. 
  Green 
  I 
  Gould 
  MSS. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   180 
  specimens 
  were 
  collected 
  on 
  the 
  reef. 
  

  

  394. 
  Perna 
  . 
  Sp. 
  indet. 
  h. 
  

  

  With 
  the 
  preceding 
  : 
  30 
  specimens 
  were 
  collected. 
  

  

  Family— 
  MYTILID^. 
  

   395. 
  Pinna 
  maura. 
  

  

  Synonymy. 
  

  

  Pinna 
  maura 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  84. 
  June 
  1835. 
  

   HanleyDescr. 
  Catal. 
  p. 
  255. 
  1845? 
  

  

  Station. 
  — 
  Muddy 
  banks 
  ; 
  Cuming 
  I 
  Sowerby. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  Cuming 
  ! 
  Sowerby. 
  

   Panama 
  ; 
  Hanley 
  I 
  

  

  