﻿Descriptions 
  of 
  New 
  Species 
  of 
  Marginella, 
  ivilh 
  Notes 
  on 
  

   Sundry 
  Species 
  of 
  M-xrowkllk 
  and 
  Cypkmx. 
  By 
  John 
  H. 
  

   Redfield. 
  Read 
  May 
  24th, 
  1852. 
  

  

  Marginella 
  vexillum. 
  

  

  Testa 
  ovata, 
  straminea, 
  fasciis 
  inaiqualis 
  purpureo-fusci 
  • 
  alba 
  concin- 
  

   ne 
  catenatis 
  ornata: 
  anfraetibus 
  4 
  — 
  5, 
  spira 
  mediocri, 
  coiiica 
  ; 
  labio 
  

   crasso, 
  purpurco-punctato, 
  intus 
  denticulato 
  ; 
  columella 
  albo 
  callosa, 
  4- 
  

   plicata 
  ; 
  apertura 
  angusta. 
  

  

  Description. 
  — 
  Shell 
  ovate, 
  composed 
  of 
  4 
  to 
  5 
  whorls, 
  with 
  

   a 
  moderately 
  conical 
  spire. 
  The 
  ground-work 
  of 
  the 
  coloring 
  

   is 
  yellowish 
  white, 
  which 
  is 
  crossed 
  at 
  irregular 
  intervals 
  by 
  

   unequal 
  bands 
  of 
  purplish 
  brown, 
  (the 
  example 
  before 
  us 
  dis- 
  

   playing 
  six 
  of 
  them.) 
  On 
  close 
  examination 
  these 
  bands 
  are 
  

   found 
  to 
  be 
  composed 
  of 
  an 
  exquisite 
  chain 
  work, 
  consisting 
  

   of 
  transverse 
  alternating 
  white 
  and 
  brown 
  lines, 
  the 
  lighter 
  

   ones 
  being 
  regularly 
  interrupted 
  by 
  darker 
  longitudinal 
  lines. 
  

   In 
  the 
  upper 
  band 
  the 
  transverse 
  chain 
  work 
  is 
  less 
  apparent, 
  

   and 
  vertical 
  lines 
  are 
  more 
  predominant. 
  Beside 
  the 
  trans- 
  

   verse 
  bands 
  which 
  form 
  the 
  most 
  conspicuous 
  markings 
  of 
  the 
  

   shell, 
  the 
  example 
  before 
  us 
  exhibits 
  traces 
  of 
  vertical 
  highly 
  

   undulating 
  lines 
  of 
  yellow, 
  arranged 
  in 
  flames 
  or 
  patches, 
  of 
  

   which 
  7 
  or 
  8 
  may 
  be 
  seen 
  on 
  the 
  body 
  whorl. 
  Probably 
  this 
  

   is 
  more 
  apparent 
  when 
  the 
  enamel 
  is 
  in 
  perfect 
  condition; 
  

   The 
  outer 
  lip 
  is 
  much 
  thick-encd, 
  covered 
  with 
  brown 
  dots, 
  

   and 
  denticulate 
  within. 
  The 
  columellar 
  margin 
  is 
  covered 
  

   with 
  a 
  white 
  callosity, 
  and 
  has 
  four 
  plaits. 
  Aperture 
  rather 
  

   narrow. 
  

  

  Length, 
  0.71 
  inch, 
  (19 
  millim.) 
  Breadth, 
  0.41 
  inch, 
  (11 
  

   millim.) 
  

  

  Habitat. 
  — 
  Cape 
  Palmas, 
  West 
  Africa. 
  

  

  Remarks. 
  — 
  The 
  only 
  example 
  known 
  to 
  me 
  of 
  this 
  elegant 
  

  

  