﻿CYTHEREA. 
  Panama 
  Shells. 
  497 
  

  

  minent, 
  approximate 
  : 
  posterior 
  area 
  long 
  and 
  narrow, 
  well 
  

   defined 
  : 
  lunule 
  cordiform, 
  defined 
  by 
  a 
  well 
  impressed 
  line 
  ; 
  

   both 
  areas 
  striate 
  : 
  margin 
  of 
  tlie 
  interior 
  not 
  crenulate 
  : 
  ante- 
  

   rior 
  tooth 
  much 
  larger 
  than 
  the 
  others. 
  This 
  shell 
  belongs 
  to 
  a 
  

   group 
  of 
  very 
  closely 
  allied 
  species, 
  among 
  which 
  are 
  C. 
  inflata, 
  

   C. 
  alhida, 
  C. 
  convexa, 
  dx\ 
  

   Length 
  1.25 
  inch 
  ; 
  height 
  1 
  inch 
  ; 
  breadth 
  .68 
  inch. 
  

  

  Station. 
  — 
  Unknown. 
  

  

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

   We 
  found 
  8 
  specimens 
  on 
  the 
  reef. 
  

  

  446. 
  Cytherea 
  radiata. 
  

  

  Synonymy. 
  

  

  Cytherea 
  radiata 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  23. 
  Feb. 
  1835. 
  

  

  Hanley 
  in 
  Descr. 
  Catal. 
  p. 
  106. 
  1845 
  ? 
  

  

  Sowb. 
  Thes. 
  Conch, 
  p. 
  615. 
  No. 
  9. 
  pi. 
  128. 
  f. 
  

  

  28-31. 
  1851, 
  

  

  Station. 
  — 
  In 
  sandy 
  mud 
  at 
  a 
  depth 
  of 
  9 
  fathoms 
  ; 
  Cuming 
  I 
  

   Sowerby. 
  

  

  Habitat. 
  — 
  Salango 
  and 
  Xipixapi 
  ; 
  Cuming 
  ! 
  Sowerby, 
  

   West 
  Columbia 
  ; 
  Hanley 
  : 
  also 
  Jay. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  I 
  

  

  2 
  specimens 
  were 
  found. 
  

  

  447. 
  Cytherea 
  squalida. 
  

  

  Synonymy. 
  

  

  Cytherea 
  squalida 
  Sowb. 
  in 
  Proc. 
  Zool. 
  Soc. 
  Lond. 
  p. 
  23. 
  Feb. 
  1835- 
  

  

  hiradiata 
  Gray 
  in 
  Beech. 
  Voy. 
  Zool. 
  p. 
  151. 
  pi. 
  43. 
  f. 
  5. 
  1839. 
  

  

  Siebold 
  in 
  Wiegm. 
  Archiv. 
  1839. 
  

  

  squalida 
  Sowb. 
  Thes. 
  Conch, 
  p. 
  629. 
  No. 
  61 
  (pars). 
  

  

  pi. 
  181. 
  f. 
  87. 
  (88, 
  89 
  exclus.) 
  - 
  - 
  1851. 
  

  

  Mr. 
  Sowerby 
  (in 
  Thes. 
  Conch.) 
  says 
  that 
  the 
  species, 
  as 
  there 
  

   constituted, 
  was 
  first 
  named 
  from 
  specimens 
  brought 
  by 
  Mr. 
  

  

  