﻿42 
  Descriptions 
  of 
  New 
  Species 
  of 
  

  

  obtusely 
  angular 
  : 
  aperture 
  ovate, 
  acute 
  above, 
  with 
  an 
  ex- 
  

   tremely 
  thick 
  deposit 
  on 
  the 
  inner 
  side, 
  with 
  a 
  very 
  large 
  com- 
  

   pressed 
  coluraellar 
  fold. 
  

  

  Mean 
  divergence 
  50° 
  ; 
  length 
  1.33 
  inch 
  ; 
  breadth 
  .7 
  inch 
  ; 
  

   length 
  of 
  aperture 
  .61 
  inch. 
  

  

  The 
  unique 
  specimen 
  which 
  has 
  served 
  for 
  this 
  description 
  

   is 
  somewhat 
  faded, 
  and 
  the 
  lip 
  probably 
  is 
  not 
  quite 
  mature, 
  

   being 
  sharp. 
  

  

  AoHATiNELLA 
  Tappaniana. 
  Shell 
  reversed, 
  elongate 
  ovate- 
  

   conic 
  : 
  pure 
  white, 
  with 
  one 
  narrow 
  brown 
  spiral 
  band 
  on 
  the 
  

   periphery 
  of 
  the 
  last 
  whorl 
  : 
  with 
  very 
  unequal 
  and 
  irregular 
  

   transverse 
  striae, 
  and 
  numerous 
  excessively 
  minute 
  wrinkled 
  

   spiral 
  impressed 
  lines 
  : 
  apex 
  subacute 
  : 
  spire 
  elongate, 
  with 
  

   the 
  outlines 
  a 
  little 
  curvilinear 
  : 
  whorls 
  nearly 
  seven, 
  moder- 
  

   ately 
  convex, 
  and 
  more 
  or 
  less 
  subangular, 
  margined 
  above, 
  

   with 
  a 
  well 
  impressed 
  suture 
  : 
  aperture 
  ovate 
  ; 
  lip 
  well 
  thick- 
  

   ened 
  within 
  the 
  margin, 
  expanded 
  much 
  anteriorly 
  but 
  not 
  

   above 
  ; 
  columellar 
  fold 
  strong. 
  

  

  Mean 
  divergence 
  43° 
  ; 
  length 
  1.06 
  inch 
  ; 
  breadth 
  .55 
  inch 
  ; 
  

   length 
  of 
  aperture 
  .44 
  inch. 
  

  

  Var. 
  dubiosa 
  differs 
  in 
  being 
  a 
  little 
  more 
  ventricose 
  ; 
  its 
  

   whorls 
  are 
  not 
  margined 
  above, 
  and 
  the 
  brown 
  stripe 
  is 
  re- 
  

   placed 
  by 
  two 
  fine 
  paler 
  brown 
  lines, 
  below 
  which 
  one 
  or 
  two 
  

   other 
  yet 
  finer 
  lines 
  may 
  be 
  seen. 
  

  

  Habitat, 
  Sandwich 
  Islands. 
  

  

  This 
  beautiful 
  species 
  is 
  named 
  in 
  honor 
  of 
  Hon. 
  Benja- 
  

   min 
  Tappan, 
  of 
  Ohio. 
  

  

  AciiATiNELLA 
  DiMONDi. 
  Shell 
  revcrscd, 
  thick, 
  long 
  ovate- 
  

   conic 
  : 
  dingy 
  white 
  or 
  very 
  pale 
  yellowish 
  brown, 
  with 
  a 
  

   blackish 
  margin 
  to 
  the 
  aperture 
  when 
  mature 
  ; 
  with 
  a 
  green- 
  

   ish 
  black 
  fugacious 
  epidermis 
  : 
  with 
  the 
  transverse 
  striae 
  

   rather 
  slight, 
  very 
  unequal 
  and 
  irregular, 
  without 
  spiral 
  striae 
  • 
  

   apex 
  subacute 
  : 
  spire 
  rather 
  long, 
  with 
  the 
  outlines 
  moderately 
  

  

  