﻿NASSA. 
  Panama 
  Shells. 
  285 
  

  

  Station. 
  — 
  Unknown. 
  

  

  Habitat. 
  — 
  Panama 
  ; 
  E. 
  Jewett 
  ! 
  G-ould 
  Mss. 
  

   Taboga 
  and 
  Panama 
  ; 
  C. 
  B. 
  A. 
  ! 
  

   17 
  specimens 
  were 
  obtained. 
  

  

  4G. 
  IVassa 
  g'eiiiiiiiilosa. 
  — 
  Nov. 
  sp. 
  

  

  Shell 
  ovate 
  conic, 
  ventricose 
  : 
  whitish, 
  more 
  or 
  less 
  tinged 
  

   with 
  yellowish 
  brown 
  ; 
  with 
  a 
  narrow 
  spiral 
  stripe 
  of 
  brown 
  

   at 
  the 
  upper 
  margin 
  of 
  the 
  whorls, 
  and 
  another 
  anteriorly 
  ; 
  

   with 
  two 
  or 
  three 
  minute 
  spiral 
  brown 
  lines 
  on 
  the 
  middle 
  of 
  

   the 
  last 
  whorl, 
  which 
  are 
  interrupted 
  by 
  the 
  nodules 
  : 
  with 
  

   about 
  fifteen 
  or 
  sixteen 
  minute 
  ribs 
  on 
  each 
  whorl, 
  and 
  spiral 
  

   raised 
  lines, 
  of 
  which 
  three 
  or 
  four 
  are 
  visible 
  on 
  the 
  spire 
  ; 
  

   with 
  the 
  intersections 
  developed 
  into 
  well 
  rounded 
  nodules 
  : 
  

   spire 
  with 
  the 
  outlines 
  rectilinear: 
  apex 
  very 
  acute 
  : 
  whorls 
  

   seven, 
  a 
  little 
  convex, 
  with 
  a 
  distinct 
  suture 
  ; 
  last 
  whorl 
  spi- 
  

   rally 
  subcanaliculate 
  anteriorly 
  : 
  labrum 
  subacute, 
  well 
  thick- 
  

   ened 
  by 
  a 
  varix, 
  coarsely 
  ridged 
  within 
  : 
  labium 
  much 
  arcuated, 
  

   a 
  little 
  thickened 
  but 
  not 
  appressed 
  : 
  notch 
  deep. 
  

  

  Mean 
  divergence 
  about 
  56° 
  ; 
  length 
  .25 
  inch 
  ; 
  breadth 
  .17 
  

   inch 
  ; 
  length 
  of 
  spire 
  .15 
  inch. 
  

  

  Station. 
  — 
  U 
  nknown. 
  

  

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

   1 
  specimen 
  was 
  obtained. 
  

  

  47. 
  Nassa 
  g'iaiica.— 
  Nov. 
  sp. 
  

  

  _ 
  Shell 
  ovate 
  conic, 
  ventricose: 
  glaucous 
  or 
  olivaceous, 
  with 
  

   a 
  broad 
  spiral 
  stripe 
  of 
  dingy 
  white 
  a 
  little 
  above 
  the 
  suture, 
  

   whitish 
  about 
  the 
  aperture, 
  deeply 
  colored 
  in 
  the 
  anterior 
  spi- 
  

   ral 
  canal 
  : 
  with, 
  on 
  each 
  whorl, 
  about 
  ten 
  ribs, 
  of 
  which 
  the 
  

   last 
  two 
  or 
  three 
  next 
  to 
  the 
  aperture 
  are 
  nearly 
  obsolete 
  ; 
  

   with 
  many 
  spiral 
  striae, 
  which 
  traverse 
  the 
  ribs 
  : 
  spire 
  with 
  

   the 
  outlines 
  nearly 
  rectilinear 
  : 
  apex 
  acute 
  : 
  whorls 
  eight, 
  

  

  