﻿CALYPTR^A. 
  Panama 
  Shells. 
  448 
  

  

  Station. 
  — 
  Attached 
  to 
  rocks 
  ; 
  Cuming 
  ! 
  Sowerby. 
  Our 
  speci- 
  

   mens 
  were 
  found 
  attaclied 
  to 
  stones 
  near 
  low 
  water 
  mark. 
  

  

  Edbitat. 
  — 
  Panama 
  and 
  the 
  Gallapago 
  Is. 
  ; 
  Cuming 
  ! 
  Sowerby. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   16 
  specimens 
  were 
  collected. 
  

  

  330. 
  Calyptraea 
  aberrant. 
  Nov. 
  sp. 
  

  

  Shell 
  irregularly, 
  somewhat 
  concave 
  externally 
  : 
  papyraceous, 
  

   pearly, 
  with 
  fine 
  irregular 
  strise 
  of 
  growth 
  : 
  apex 
  very 
  minute, 
  

   subterminal 
  : 
  the 
  cup 
  in 
  our 
  unique 
  specimen 
  is 
  probably 
  imper- 
  

   fect 
  : 
  what 
  remains 
  consists 
  of 
  a 
  very 
  thin, 
  deeply 
  concave, 
  nar- 
  

   row 
  lamina, 
  transversely 
  attached 
  under 
  the 
  apex 
  of 
  the 
  shell. 
  

   In 
  texture 
  this 
  shell 
  much 
  resembles 
  a 
  valve 
  of 
  an 
  Anomia. 
  

  

  Length 
  .7 
  inch 
  ; 
  breadth 
  .59 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  C. 
  B. 
  A. 
  1 
  

   Only 
  1 
  specimen 
  was 
  found. 
  

  

  331. 
  CalyptraBa 
  (Syphopatella) 
  aspersa. 
  Nov. 
  sp. 
  

  

  Shell 
  conic: 
  thin: 
  dingy 
  or 
  brownish 
  white, 
  irregularly 
  

   sprinkled 
  with 
  many 
  reddish 
  brown 
  spots 
  : 
  with 
  very 
  short 
  and 
  

   irregular 
  minute 
  wrinkles: 
  apex 
  acute, 
  central: 
  lamina 
  with 
  

   the 
  fold 
  appressed 
  only 
  at 
  the 
  inner 
  margin, 
  broadly 
  expanded, 
  

   making 
  about 
  two 
  thirds 
  of 
  a 
  revolution 
  : 
  margin 
  very 
  thin 
  

   and 
  acute. 
  

  

  Diameter 
  .55 
  inch 
  ; 
  height 
  .21 
  inch. 
  

  

  Station. 
  — 
  Under 
  stones 
  at 
  low 
  water 
  mark. 
  

  

  Baiito^.— 
  Panama 
  ; 
  C. 
  B. 
  A. 
  I 
  

   3 
  specimens 
  were 
  found. 
  

  

  