﻿284 
  Panama 
  Shells. 
  purpurid^. 
  

  

  mate 
  but 
  not 
  obsolete 
  on 
  the 
  last 
  part 
  of 
  the 
  last 
  whorl 
  ; 
  with 
  

   many 
  spiral 
  raised 
  lines, 
  with 
  the 
  intersections 
  subnodulous 
  : 
  

   spire 
  with 
  the 
  outlines 
  nearly 
  rectilinear 
  : 
  apex 
  acute 
  : 
  whorls 
  

   seven, 
  slightly 
  convex, 
  with 
  a 
  distinct 
  suture 
  ; 
  last 
  whorl 
  with 
  

   a 
  minute 
  spiral 
  canal 
  anteriorly 
  : 
  aperture 
  subelliptical 
  : 
  la- 
  

   brum 
  subacute, 
  thickened 
  with 
  a 
  stout 
  varix, 
  within 
  crenu- 
  

   lated 
  coarsely 
  and 
  unequally 
  : 
  labium 
  a 
  little 
  thickened, 
  not 
  

   appressed 
  : 
  with 
  a 
  deep 
  notch. 
  

  

  Mean 
  divergence 
  about 
  50° 
  ; 
  length 
  .38 
  inch 
  : 
  breadth 
  .21 
  

   inch 
  ; 
  length 
  of 
  spire 
  .23 
  inch. 
  

  

  Var. 
  «; 
  smaller 
  (.23 
  inch 
  long); 
  with 
  the 
  lower 
  fascia 
  

   much 
  broader, 
  and 
  darker 
  anteriorly. 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  (var. 
  «) 
  ; 
  E. 
  Jewett 
  ! 
  Gould 
  Mss. 
  

   Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   "We 
  obtained 
  4 
  specimens 
  of 
  the 
  type, 
  and 
  one 
  of 
  the 
  va- 
  

   riety. 
  

  

  45. 
  j^'assa 
  corpuienta, 
  Nov. 
  sp. 
  

  

  Shell 
  ovate 
  conic, 
  very 
  robust 
  : 
  spirally 
  banded 
  with 
  white 
  

   and 
  brown, 
  sometimes 
  mostly 
  white, 
  sometimes 
  mostly 
  brown, 
  

   with 
  a 
  broad 
  white 
  stripe 
  below 
  the 
  middle 
  of 
  the 
  last 
  whorl, 
  

   white 
  in 
  and 
  about 
  the 
  aperture 
  : 
  with, 
  on 
  each 
  whorl, 
  about 
  

   eleven 
  narrow 
  ribs, 
  which 
  are 
  traversed 
  by 
  spiral 
  raised 
  lines: 
  

   spire 
  with 
  the 
  outlines 
  rectilinear 
  or 
  slightly 
  concave 
  : 
  apex 
  

   acute 
  : 
  whorls 
  nine, 
  moderately 
  convex, 
  with 
  a 
  well 
  impressed 
  

   suture 
  ; 
  last 
  whorl 
  very 
  large 
  and 
  ventricose, 
  spirally 
  canali- 
  

   culate 
  anteriorly 
  : 
  aperture 
  subelliptical, 
  contracted 
  : 
  iabrum 
  

   subacute 
  thickened 
  with 
  a 
  very 
  stout 
  varix, 
  within 
  coarsely 
  

   sulcate 
  : 
  labium 
  wrinkled, 
  a 
  little 
  thickened 
  but 
  not 
  appressed 
  : 
  

   notch 
  large 
  and 
  deep. 
  N. 
  f 
  estiva 
  Powis 
  must 
  resemble 
  this 
  

   shell, 
  and 
  possibly 
  may 
  be 
  identical 
  with 
  it. 
  

  

  Mean 
  divergence 
  about 
  46° 
  ; 
  length 
  .88 
  inch 
  ; 
  breadth 
  .63 
  

   inch 
  ; 
  length 
  of 
  spire 
  .46 
  inch. 
  

  

  