﻿442 
  Panama 
  Shells. 
  CALYPTE^ID.B. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   12 
  specimens 
  were 
  collected. 
  

  

  328. 
  Hipponyx 
  Panamensis. 
  

  

  /Synonymy. 
  

  

  Hipponyx 
  mitrula 
  Sowb. 
  (non 
  Lam.) 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  

  

  p. 
  5. 
  Jan. 
  1835. 
  

  

  Sowb. 
  (non 
  Lam.) 
  Thes. 
  in 
  Conch, 
  p. 
  369. 
  No. 
  

  

  2. 
  pi. 
  73. 
  f. 
  18-20. 
  - 
  - 
  - 
  - 
  1846. 
  

  

  We 
  propose 
  this 
  name 
  for 
  a 
  shell, 
  whicli 
  Mr. 
  Sowerby 
  seems 
  

   to 
  have 
  confounded 
  with 
  H. 
  mitrula 
  Lam. 
  The 
  Lamarckian 
  

   shell 
  is 
  the 
  Caribbean 
  species, 
  which 
  has 
  a 
  curved 
  apex 
  that 
  is 
  

   sometimes 
  much 
  elongated, 
  " 
  apice 
  adunco 
  " 
  Lam. 
  The 
  Panama 
  

   shell 
  is 
  obliquely" 
  conic, 
  with 
  the 
  apex 
  moderately 
  prominent. 
  

   The 
  concentric 
  laminae 
  are 
  more 
  numerous 
  and 
  the 
  radiating 
  

   strise 
  on 
  them 
  are 
  more 
  deeply 
  impressed 
  than 
  in 
  the 
  Caribbean 
  

   shell. 
  This 
  species 
  is 
  thick 
  and 
  solid. 
  

  

  Length 
  .67 
  inch 
  ; 
  breadth 
  .7 
  inch 
  ; 
  height 
  .87 
  inch. 
  

  

  A 
  dead 
  specimen 
  of 
  Cardita 
  afflnis 
  has 
  on 
  one 
  valve 
  4 
  rather 
  

   small 
  individuals. 
  The 
  attached 
  valves 
  are 
  rather 
  thin, 
  and 
  have 
  

   been 
  more 
  or 
  less 
  perforated, 
  from 
  within 
  the 
  Cardita, 
  by 
  some 
  

   boring 
  animal. 
  Around 
  the 
  perforations 
  there 
  is 
  a 
  thicker 
  

   deposit, 
  which 
  fills 
  up 
  some 
  of 
  them. 
  

  

  Station. 
  — 
  On 
  stones 
  in 
  17 
  fathoms 
  water, 
  among 
  coarse 
  sand 
  ; 
  

   Cuming 
  ! 
  Sowerby. 
  Our 
  specimens 
  were 
  found 
  on 
  stones 
  and 
  

   shells 
  near 
  low 
  water 
  mark. 
  

  

  Habitat 
  — 
  Lobos 
  I. 
  ; 
  Cuming 
  ! 
  Sowerby. 
  

  

  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   14 
  specimens 
  were 
  collected. 
  

  

  329. 
  Hipponyx 
  radiata. 
  

  

  ' 
  Synonymy. 
  

  

  Hipponyx 
  radiata 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  5. 
  Jan. 
  1835 
  

   Sowb. 
  Thes. 
  Conch, 
  p. 
  370. 
  No. 
  4. 
  pi. 
  73. 
  f. 
  24, 
  25. 
  1846 
  

  

  