﻿44 
  Descriptions 
  of 
  New 
  Species 
  of 
  Partula, 
  Sfc. 
  

  

  varieties- 
  from 
  .76 
  inch 
  : 
  .35 
  inch 
  to 
  .64 
  inch 
  : 
  .4 
  inch. 
  The 
  

   dimensions 
  of 
  Dr. 
  Grould's 
  type, 
  .75 
  inch 
  : 
  .4 
  inch, 
  are 
  most 
  

   common. 
  

  

  AcHATiNELLA 
  MODESTA. 
  Shell 
  rather 
  thick 
  and 
  short, 
  ovate- 
  

   conic 
  : 
  dingy 
  reddish 
  or 
  ash 
  brown 
  ; 
  more 
  or 
  less 
  covered 
  with 
  

   a 
  dingy 
  dark 
  brown 
  epidermis 
  : 
  with 
  fine 
  irregular 
  transverse 
  

   striae, 
  which 
  are 
  coarser 
  on 
  the 
  upper 
  whorls 
  ; 
  without 
  spiral 
  

   striae 
  : 
  apex 
  subacute 
  : 
  spire 
  short, 
  with 
  the 
  outlines 
  quite 
  

   curvilinear 
  : 
  whorls 
  six, 
  moderately 
  convex, 
  with 
  a 
  well 
  im- 
  

   pressed 
  suture 
  ; 
  last 
  whorl 
  rather 
  ventricose 
  : 
  aperture 
  ovate, 
  

   somewhat 
  acute 
  above 
  ; 
  lip 
  sharp, 
  not 
  expanded, 
  moderately 
  

   thickened 
  within 
  ; 
  columellar 
  fold 
  well 
  developed, 
  quite 
  

   oblique. 
  

  

  Mean 
  divergence 
  50° 
  ; 
  length 
  .54 
  inch 
  ; 
  breadth 
  .3 
  inch 
  ; 
  

   length 
  of 
  aperture 
  .26 
  inch. 
  

  

  The 
  corresponding 
  dimensions 
  of 
  another 
  specimen 
  are 
  — 
  

   47° 
  ; 
  .55 
  inch 
  ; 
  .29 
  inch 
  ; 
  .24 
  inch. 
  

  

  Habitat, 
  Sandwich 
  Islands. 
  

  

  AcHATiNELLA 
  Reevei. 
  Although 
  the 
  name 
  Achatinella 
  

   radiata 
  Pfr. 
  appears 
  in 
  Dr. 
  PfeifFer's 
  Hel. 
  Monog. 
  as 
  a 
  syn- 
  

   onyme 
  of 
  A. 
  viridans 
  Migh., 
  yet 
  Mr. 
  Reeve, 
  in 
  his 
  beautiful 
  

   monograph 
  of 
  this 
  genus, 
  has 
  represented 
  this 
  species 
  under 
  

   the 
  name 
  of 
  A. 
  radiata, 
  and 
  has 
  given 
  another 
  species 
  with 
  Dr. 
  

   Mighels' 
  name. 
  Dr. 
  M. 
  and 
  myself 
  about 
  the 
  same 
  time 
  re- 
  

   ceived 
  this 
  very 
  distinct 
  species, 
  and 
  having 
  seen 
  it 
  in 
  his 
  col- 
  

   lection, 
  I 
  cannot 
  doubt 
  the 
  correctness 
  of 
  Dr. 
  Pfeiffer's 
  synony- 
  

   my. 
  Some 
  other 
  specimens 
  before 
  me 
  appear 
  to 
  be 
  very 
  

   exactly 
  represented 
  by 
  Mr. 
  Reeve's 
  figure 
  of 
  A. 
  viridans, 
  and 
  

   are 
  most 
  nearly 
  allied 
  to 
  a 
  group 
  consisting 
  of 
  A. 
  pulcherrima 
  

   Swains., 
  A. 
  castanea 
  Rv., 
  A. 
  abbreviata 
  Rv., 
  &c. 
  I 
  propose 
  

   for 
  Mr. 
  R.'s 
  A. 
  viridans 
  the 
  name 
  which 
  stands 
  at 
  the 
  head 
  

   of 
  this 
  paragraph. 
  

  

  