﻿402 
  Mr. 
  E. 
  A. 
  Smith 
  on 
  Mollusca 
  

  

  (Ferussac) 
  ; 
  in 
  gardens 
  at 
  Cayenne, 
  also 
  in 
  the 
  woods 
  and 
  

   other 
  parts 
  of 
  Guiana 
  (Drouet) 
  • 
  Martinique, 
  very 
  abundant 
  

   in 
  all 
  parts, 
  especially 
  in 
  damp 
  and 
  shady 
  places 
  (Maze) 
  ; 
  

   Guadeloupe, 
  rare! 
  (MazS) 
  ; 
  St. 
  Lucia 
  (Bland 
  and 
  Tate). 
  

  

  The 
  specimens 
  from 
  St. 
  Lucia 
  apparently 
  do 
  not 
  differ 
  

   from 
  those 
  occurring 
  on 
  the 
  mainland 
  in 
  Guiana 
  and 
  present 
  

   very 
  little 
  variation 
  among 
  themselves. 
  Some 
  have 
  the 
  spire 
  

   rather 
  more 
  elevated 
  than 
  others 
  and 
  some 
  slight 
  difference 
  in 
  

   size 
  is 
  noticeable. 
  The 
  colour 
  appears 
  to 
  be 
  very 
  constant 
  

   and 
  is 
  well 
  represented 
  by 
  the 
  figures 
  of 
  Reeve 
  and 
  Pfeiffer. 
  

   Young 
  shells 
  are 
  deeply 
  perforate 
  and 
  sharply 
  keeled 
  at 
  the 
  

   periphery. 
  

  

  *2. 
  Helix 
  (Hadra) 
  sanctcc-lucice. 
  

  

  Testa 
  depressa, 
  orbicularis, 
  anguste 
  perforata, 
  tenuis, 
  nitida, 
  vinoso- 
  

   coruea, 
  ad 
  peripheriam 
  carinatam 
  pallida 
  aut 
  virescens 
  ; 
  anfractua 
  

   5, 
  lente 
  creseeutes, 
  superne 
  eonvexiusculi, 
  radiatim 
  fortiter 
  pli- 
  

   cati, 
  microscopice 
  spiraliter 
  striati 
  ; 
  ultimus 
  paulo 
  supra 
  medium 
  

   carinatus, 
  vix 
  descendens, 
  infra 
  carinam 
  leviter 
  plicatus, 
  striis 
  

   incrementi 
  aliisque 
  concentricis 
  tenuissimis 
  sculptus 
  ; 
  apertura 
  

   lunata 
  ; 
  peristoma 
  vinoso-fuscum, 
  anguste 
  expansum 
  et 
  reflexum, 
  

   supra 
  umbilieum 
  leviter 
  dilatatum, 
  marginibus 
  callo 
  tenuissimo 
  

   juuctis. 
  

  

  Diam. 
  maj. 
  18 
  millim., 
  min. 
  14| 
  ; 
  alt. 
  9£. 
  

  

  This 
  species 
  is 
  remarkable 
  on 
  account 
  of 
  the 
  strongly 
  

   plicate 
  upper 
  surface, 
  which 
  contrasts 
  with 
  the 
  comparatively 
  

   smooth 
  base. 
  The 
  first 
  two 
  whorls 
  forming 
  the 
  top 
  of 
  the 
  

   spire 
  are 
  smooth 
  and 
  the 
  plicae 
  gradually 
  develop 
  in 
  thickness 
  

   upon 
  the 
  remaining 
  volutions. 
  Upon 
  the 
  last 
  whorl 
  they 
  

   are 
  interrupted 
  by 
  the 
  pale 
  keel, 
  and 
  soon 
  attenuate 
  and 
  be- 
  

   come 
  obsolete 
  beneath 
  it. 
  The 
  keel 
  passes 
  right 
  round 
  the 
  

   whorl, 
  but 
  does 
  not 
  modify 
  the 
  regular 
  curve 
  of 
  the 
  labrum. 
  

  

  The 
  foot 
  of 
  the 
  animal 
  is 
  of 
  a 
  vinous 
  tint 
  and 
  the 
  mantle 
  

   is 
  conspicuously 
  marbled 
  with 
  coal-black. 
  

  

  3. 
  Helix 
  (Acanthi 
  'nula) 
  ierensis, 
  Guppy. 
  

  

  Helix 
  iervmis, 
  Guppy, 
  Proc. 
  Sci. 
  Assoc. 
  Trinidad, 
  1869, 
  p. 
  242; 
  Amer. 
  

   J. 
  Couch, 
  vol. 
  vi. 
  p. 
  307, 
  pi. 
  xvii. 
  tig. 
  4 
  ; 
  Tate, 
  Amu 
  & 
  Mag. 
  Nat. 
  

   Hist. 
  I860, 
  vol. 
  iv. 
  p. 
  356. 
  

  

  Hob. 
  Trinidad 
  (Guppy) 
  ; 
  Santa 
  Lucia, 
  " 
  among 
  rubbish 
  of 
  

   old 
  walls 
  and 
  houses, 
  Castries" 
  (Tate). 
  

  

  4. 
  Helix, 
  n. 
  sp. 
  

   Hab. 
  Santa 
  Lucia 
  (Tate). 
  

  

  