﻿which 
  inhabit 
  Jamaica. 
  49 
  

  

  Length 
  (after 
  truncation) 
  .175 
  inch 
  ; 
  breadth 
  .06 
  inch 
  ; 
  

   length 
  of 
  aperture 
  .045 
  inch. 
  

  

  Helicina 
  nobilis. 
  Shell 
  depressed 
  globose 
  conic, 
  thick 
  and 
  

   solid 
  : 
  white 
  beneath 
  and 
  at 
  the 
  end 
  of 
  the 
  last 
  whorl, 
  other- 
  

   wise 
  rufous 
  or 
  dark 
  brownish 
  red 
  : 
  very 
  smooth, 
  the 
  striae 
  of 
  

   growth 
  being 
  very 
  light 
  ; 
  sometimes 
  with 
  a 
  few 
  very 
  light 
  

   spiral 
  striae 
  : 
  apex 
  obtuse 
  : 
  spire 
  convex 
  conic 
  : 
  whorls 
  nearly 
  

   four 
  and 
  one-half, 
  subplanulate, 
  with 
  a 
  rather 
  deep 
  suture 
  ; 
  

   last 
  whorl 
  much 
  depressed 
  or 
  even 
  sinuate 
  between 
  the 
  per- 
  

   iphery 
  and 
  suture 
  at 
  its 
  termination 
  : 
  aperture 
  compressed 
  

   above, 
  expanded 
  laterally 
  : 
  lip 
  rather 
  thick, 
  moderately 
  re- 
  

   flected 
  along 
  the 
  middle 
  only 
  ; 
  with 
  a 
  notch 
  like 
  that 
  of 
  H, 
  

   maxima 
  Soivb. 
  

  

  Mean 
  divergence 
  130^ 
  ; 
  greatest 
  breadth 
  .9 
  inch 
  ; 
  least 
  

   breadth 
  .73 
  inch 
  ; 
  height 
  .55 
  inch. 
  

  

  This 
  species 
  differs 
  from 
  H. 
  maxima 
  in 
  the 
  flattening 
  of 
  

   the 
  whorls, 
  which 
  renders 
  the 
  spire 
  conic 
  ; 
  in 
  the 
  compression 
  

   of 
  the 
  aperture 
  from 
  above, 
  and 
  the 
  slight 
  reflection 
  of 
  the 
  lip 
  ; 
  

   it 
  is 
  also 
  more 
  solid 
  and 
  less 
  convex 
  beneath. 
  

  

  Helicina 
  hirsuta. 
  Shell 
  depressed 
  globose, 
  rather 
  thin 
  : 
  

   brownish 
  red, 
  with 
  an 
  hirsute 
  brown 
  epidermis, 
  having 
  long 
  

   hairs 
  in 
  six 
  spiral 
  lines, 
  of 
  which 
  one 
  is 
  next 
  below 
  the 
  suture 
  

   and 
  the 
  others 
  are 
  on 
  the 
  middle 
  and 
  lower 
  parts 
  of 
  the 
  last 
  

   whorl 
  : 
  with 
  the 
  striae 
  of 
  growth 
  lightly 
  impressed 
  : 
  apex 
  

   rather 
  obtuse, 
  slightly 
  mucronate 
  : 
  spire 
  with 
  the 
  outlines 
  

   much 
  curved 
  : 
  whorls 
  nearly 
  five, 
  slightly 
  planulate, 
  with 
  a 
  

   well 
  impressed 
  suture 
  : 
  aperture 
  rather 
  large, 
  semi-elliptical 
  ; 
  

   lip 
  rather 
  thin 
  and 
  sharp, 
  but 
  well 
  reflected 
  so 
  as 
  to 
  form 
  a 
  

   canal 
  behind 
  ; 
  with 
  the 
  slit 
  not 
  very 
  deep, 
  but 
  wide. 
  

  

  Mean 
  divergence 
  110° 
  ; 
  greatest 
  breadth 
  .59 
  inch 
  ; 
  least 
  

   breadth 
  .48 
  inch 
  ; 
  height 
  .04 
  inch. 
  

  

  The 
  slit 
  has 
  about 
  the 
  same 
  proportions 
  as 
  in 
  H. 
  Hollandi, 
  

  

  