﻿226 
  Descriptions 
  of 
  New 
  Species 
  of 
  Mar 
  g^inella, 
  &j'c. 
  

  

  millim.) 
  A 
  very 
  old 
  worn 
  example 
  measured 
  25 
  millim. 
  long, 
  

   and 
  14. 
  millim. 
  broad. 
  

  

  Habitat. 
  — 
  It 
  is 
  said 
  to 
  be 
  brought 
  from 
  the 
  coast 
  of 
  Yu- 
  

   catan. 
  ]\I. 
  carnea 
  is 
  well 
  known 
  to 
  occur 
  at 
  Key 
  AYest. 
  

  

  Margixella 
  antique 
  — 
  Fossil. 
  

  

  Testa 
  elongato-ovata, 
  polita, 
  spira 
  obtecta 
  : 
  labio 
  extus 
  incrassato, 
  

   intus 
  acute 
  denticulate 
  ; 
  colameUi 
  oblique 
  quadriplicata 
  ; 
  apertura 
  an- 
  

   gusta, 
  ad 
  extremam 
  spiram 
  extensa. 
  

  

  Description. 
  — 
  Shell 
  oblong-ovate, 
  with 
  polished 
  enamel 
  ; 
  

   lip 
  much 
  thickened 
  without, 
  closely 
  and 
  deeply 
  denticulate 
  

   within, 
  and 
  extending 
  quite 
  to 
  the 
  summit 
  of 
  the 
  spire 
  which 
  

   is 
  entirely 
  concealed 
  by 
  a 
  vitreous 
  deposite 
  ; 
  aperture 
  narrow 
  ; 
  

   columella 
  with 
  four 
  oblique 
  well 
  developed 
  plaits. 
  

  

  Length, 
  1.10 
  inch, 
  (23 
  millim.) 
  Breadth, 
  0.57 
  inch, 
  (14 
  

   milhm.) 
  

  

  Habitat. 
  — 
  Found 
  in 
  the 
  miocene 
  tertiary 
  deposites 
  of 
  

   Petersburgh, 
  Ya. 
  

  

  Remarks. 
  — 
  It 
  is 
  a 
  pity 
  that 
  this 
  large 
  and 
  striking 
  Mar- 
  

   ginella 
  (for 
  which 
  I 
  am 
  indebted 
  to 
  Chas. 
  M. 
  AYheatley, 
  Esq.) 
  

   should 
  have 
  lived 
  at 
  a 
  period 
  when 
  no 
  conchologist 
  existed 
  to 
  

   appreciate 
  its 
  elegance, 
  such 
  as 
  it 
  must 
  have 
  exhibited 
  in 
  its 
  

   freshness, 
  — 
  and 
  it 
  is 
  equally 
  fortunate 
  that 
  it 
  has 
  so 
  well 
  sur- 
  

   vived 
  the 
  vicissitudes 
  of 
  ages, 
  as 
  to 
  show 
  most 
  of 
  its 
  original 
  

   beauties, 
  deprived 
  only 
  of 
  color. 
  lam 
  acquainted 
  with 
  no 
  re- 
  

   cent 
  species 
  which 
  illustrates 
  its 
  character. 
  It 
  would 
  occupy 
  

   an 
  intermediate 
  position 
  between 
  M. 
  bullata 
  Born, 
  and 
  M. 
  

   angystata 
  Soicb., 
  but 
  for 
  its 
  serrated 
  lip, 
  and 
  less 
  cylin- 
  

   drical 
  form. 
  

  

  In 
  a 
  catalogue 
  of 
  "the 
  MargineTlidaB 
  in 
  my 
  collection, 
  

   printed 
  for 
  distribution, 
  appear 
  the 
  names 
  of 
  Marginella 
  

   Gambiensis, 
  and 
  M. 
  vermiculata. 
  Both 
  these 
  names 
  I 
  have 
  

   since 
  abandoned, 
  the 
  former 
  proving 
  to 
  be 
  a 
  variety 
  of 
  M 
  

  

  