﻿448 
  Panama 
  Shells. 
  calyptrjeid^. 
  

  

  CalyptrcBa 
  radiata 
  Brod. 
  in 
  Trans. 
  Zool. 
  Soc. 
  Lond. 
  I. 
  

  

  p. 
  198. 
  pi. 
  21. 
  f. 
  6. 
  - 
  - 
  - 
  - 
  1835. 
  

  

  Miill. 
  Synop. 
  Nov. 
  Test. 
  Viv. 
  p. 
  143. 
  May 
  1836. 
  

  

  Lam. 
  An. 
  sans 
  Vert. 
  VII. 
  635. 
  No. 
  

  

  31. 
  (Desh. 
  ed.) 
  - 
  - 
  - 
  - 
  1838. 
  

   Rev. 
  Zool. 
  Cuv. 
  Soc. 
  July 
  1838. 
  

  

  Lam. 
  An. 
  sans 
  Vert. 
  III. 
  Pt. 
  1. 
  p. 
  234. 
  

  

  No. 
  31. 
  (Desh. 
  ed. 
  tert.) 
  - 
  - 
  - 
  1841. 
  

   Chenu 
  Lee. 
  Elem. 
  p. 
  144. 
  f. 
  460, 
  461. 
  - 
  184Y. 
  

  

  Station. 
  — 
  Sandy 
  mud 
  on 
  dead 
  shells 
  at 
  a 
  depth 
  of 
  7 
  to 
  14 
  

   fathoms; 
  Cuming! 
  Broderip. 
  

  

  Habitat. 
  — 
  Bay 
  of 
  Caraccas 
  ; 
  Cuming 
  ! 
  Broderip 
  : 
  also 
  Eev. 
  

   Zool. 
  : 
  also 
  Miiller. 
  

   Seas 
  of 
  South 
  America 
  ; 
  Deshayes. 
  

   Bay 
  of 
  Caraccas 
  ; 
  Jay. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  10 
  specimens 
  were 
  collected. 
  

  

  340. 
  Calyptraea 
  (Syphopatella) 
  regiilaris. 
  Nov. 
  sp. 
  

  

  Shell 
  with 
  a 
  circular 
  margin, 
  regularly 
  conic 
  : 
  moderately 
  

   thickened: 
  snow 
  white, 
  tinged 
  with 
  brown 
  about 
  the 
  apex: 
  

   with 
  very 
  fine 
  lightly 
  impressed 
  striae 
  of 
  growth, 
  somewhat 
  

   shining 
  : 
  apex 
  subacute, 
  subcentral 
  : 
  lamina 
  folded 
  so 
  as 
  to 
  

   form 
  a 
  tube 
  about 
  one-third 
  of 
  its 
  own 
  width, 
  produced 
  to 
  the 
  

   margin 
  so 
  as 
  to 
  make 
  one 
  complete 
  revolution 
  : 
  margin 
  acute. 
  

  

  Diameter 
  1.27 
  inch 
  ; 
  height 
  .55 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Mazatlan; 
  Lt. 
  Green! 
  Mus. 
  Essex 
  Inst. 
  : 
  also 
  

   Gould 
  MSS. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

  

  3 
  specimens 
  were 
  obtained. 
  

  

  