﻿524 
  Mr. 
  H. 
  B. 
  Preston 
  on 
  new 
  

  

  Orthalicus 
  sultana 
  angustior, 
  sp. 
  n. 
  

  

  Shell 
  differing 
  from 
  typical 
  Helix 
  sultana, 
  Dillwyn 
  *, 
  in 
  

   its 
  more 
  exserted 
  spire 
  and 
  much 
  narrower 
  form. 
  

   Alt. 
  65, 
  diam. 
  maj. 
  40, 
  diam. 
  min. 
  33 
  mm. 
  

   Aperture 
  : 
  alt. 
  41, 
  diam. 
  23'5 
  mm. 
  

   Hah. 
  Eastern 
  Peru. 
  

  

  Opeas 
  contamanoensis, 
  sp. 
  n. 
  

  

  Shell 
  obtusely 
  subulate, 
  polished, 
  shining, 
  greyish 
  green 
  ; 
  

   whorls 
  8j, 
  the 
  first 
  two 
  and 
  a 
  quarter 
  submamillary, 
  the 
  

   remainder 
  slowly 
  and 
  regularly 
  increasing, 
  somewhat 
  convex, 
  

   marked 
  with 
  slightly 
  oblique, 
  transverse 
  striae 
  ; 
  suture 
  well 
  

   impressed, 
  irregularly 
  crenellated 
  and 
  narrowly 
  margined 
  

   below; 
  columella 
  margin 
  very 
  slightly 
  curved, 
  obliquely 
  

   truncate 
  below, 
  labrum 
  simple 
  acute 
  ; 
  aperture 
  broadly 
  and 
  

   rather 
  shortly 
  inversely 
  auriform. 
  

  

  Alt. 
  15, 
  diam. 
  maj. 
  3*75, 
  diam. 
  min. 
  3*5 
  mm. 
  

  

  Aperture 
  : 
  alt. 
  3, 
  diam. 
  1*5 
  mm. 
  

  

  Hah. 
  ContamanOj 
  Rio 
  Ucayali, 
  Eastern 
  Peru. 
  

  

  After 
  examination 
  of 
  a 
  long 
  series 
  of 
  Opens 
  octona, 
  Ein., 
  

   from 
  many 
  localities, 
  I 
  have 
  been 
  unable 
  to 
  altogether 
  re- 
  

   concile 
  the 
  above 
  species 
  with 
  any 
  of 
  them, 
  though 
  it 
  is 
  

   undoubtedly 
  closely 
  allied 
  to 
  that 
  form. 
  

  

  Helicina 
  hasifilaris, 
  sp. 
  n. 
  

  

  Shell 
  rather 
  depressedly 
  conic, 
  slightly 
  polished, 
  brownish 
  

   yellow, 
  painted 
  with 
  a 
  broad 
  band 
  of 
  pale 
  reddish 
  on 
  the 
  

   lower 
  half 
  of 
  the 
  whorls, 
  and 
  showing 
  to 
  flesh-colour 
  on 
  the 
  

   base 
  of 
  the 
  shell 
  ; 
  whorls 
  3^, 
  the 
  last 
  acutely 
  carinate 
  at 
  

   the 
  periphery, 
  closely 
  and 
  lightly, 
  spirally 
  Urate 
  ; 
  suture 
  

   impressed, 
  very 
  narrowly 
  margined 
  above 
  ; 
  base 
  of 
  shell 
  

   sculptured 
  with 
  very 
  closely-set, 
  somewhat 
  wavy, 
  radiate, 
  

   microscopic 
  strife, 
  crossed 
  by 
  very 
  fine, 
  wavy, 
  revolving 
  strise 
  

   and 
  marked 
  with 
  fine, 
  somewhat 
  distant, 
  dark, 
  revolving 
  

   colour-lines 
  ; 
  columella 
  margin 
  obliquely 
  descending 
  above, 
  

   excavated 
  below, 
  thickened 
  into 
  an 
  almost 
  nodulous 
  pro- 
  

   jcclion 
  at 
  the 
  base, 
  whitish, 
  outwardly 
  and 
  upwardly 
  extejiding 
  

   into 
  a 
  granular, 
  parietal 
  callus 
  ; 
  labrum 
  bright 
  yellow, 
  

   receding 
  below, 
  narrowly 
  outwardly 
  expanded 
  and 
  reflexed, 
  

   the 
  outward 
  expansion 
  considerably 
  diminishing 
  above 
  ; 
  

  

  * 
  Descriptive 
  Cat. 
  ii. 
  1817, 
  p. 
  920. 
  

  

  