﻿92 
  Descriptions 
  of 
  New 
  Species 
  and 
  Varieties 
  of 
  Shells, 
  

  

  in 
  the 
  upper 
  whorls 
  is 
  less 
  than 
  in 
  that 
  shell, 
  but 
  its 
  mean 
  

   divergence 
  is 
  greater. 
  

  

  Mean 
  divergence 
  about 
  18° 
  ; 
  length 
  .385 
  inch 
  ; 
  breadth 
  

   .095 
  inch 
  ; 
  length 
  of 
  aperture 
  .11 
  inch. 
  Inhabits 
  near 
  Swift 
  

   River 
  head, 
  Portland. 
  

  

  AcHATiNA 
  soLiTARiA. 
  Shell 
  elongate, 
  ovate 
  conic 
  : 
  pale 
  

   brown 
  ; 
  with 
  dark 
  brown 
  transverse 
  lines, 
  about 
  three 
  on 
  each 
  

   whorl, 
  wanting 
  on 
  the 
  first 
  two 
  or 
  three 
  whorls 
  : 
  with 
  excess- 
  

   ively 
  minute 
  crowded 
  transverse 
  striae 
  : 
  spire 
  with 
  the 
  out- 
  

   lines 
  a 
  little 
  convex 
  : 
  apex 
  rather 
  small 
  : 
  whorls 
  eight, 
  mod- 
  

   erately 
  convex, 
  slightly 
  shouldered, 
  with 
  a 
  rather 
  deep 
  suture 
  ; 
  

   last 
  whorl 
  subplanulate, 
  long 
  : 
  labrum 
  thin, 
  sharp, 
  a 
  little 
  

   produced 
  in 
  the 
  middle 
  : 
  columella 
  well 
  produced 
  and 
  turning 
  

   a 
  little 
  to 
  the 
  left. 
  

  

  Mean 
  divergence 
  about 
  20° 
  ; 
  length 
  .52 
  inch 
  ; 
  breadth 
  .15 
  

   inch 
  ; 
  length 
  of 
  aperture 
  .185 
  inch. 
  Inhabits 
  New 
  Hope, 
  

   "Westmoreland. 
  

  

  Spiraxi^ 
  brevis. 
  Shell 
  long-ovate 
  : 
  pale 
  horn 
  color, 
  trans- 
  

   lucent 
  : 
  shining, 
  smooth 
  anteriorly, 
  otherwise 
  with 
  rather 
  

   numerous 
  microscopic 
  striae 
  : 
  spire 
  with 
  the 
  outlines 
  moder- 
  

   ately 
  curvilinear 
  : 
  apex 
  rather 
  small 
  : 
  whorls 
  six, 
  moderately 
  

   convex, 
  with 
  a 
  well 
  impressed 
  suture 
  : 
  aperture 
  ovate 
  : 
  la- 
  

   brum 
  thin 
  and 
  sharp 
  : 
  columella 
  with 
  the 
  edge 
  moderately 
  

   projected 
  into 
  the 
  aperture. 
  

  

  Mean 
  divergence 
  about 
  20° 
  ; 
  length 
  .19 
  inch 
  ; 
  breadth 
  .07 
  

   inch 
  ; 
  length 
  of 
  aperture 
  .08 
  inch. 
  

  

  The 
  variety 
  of 
  Spiraxis 
  aberrans, 
  which 
  was 
  described 
  on 
  

   page 
  88 
  as 
  destitute 
  of 
  the 
  transverse 
  brown 
  stripes, 
  may 
  be 
  

   designated 
  by 
  the 
  name 
  unfcolor. 
  

  

  Bulimus 
  mirabilis 
  and 
  B. 
  anomalus 
  may 
  be 
  referred 
  to 
  the 
  

   genus 
  Spiraxis. 
  

  

  Bulimus 
  hortensis. 
  Shell 
  much 
  elongate, 
  conic 
  : 
  horn 
  

  

  