﻿Species 
  and 
  Varieties 
  of 
  Papa. 
  407 
  

  

  case 
  where 
  the 
  latter 
  occurs, 
  the 
  description 
  in 
  the 
  Survey 
  

   seems 
  sufficiently 
  to 
  describe 
  the 
  species. 
  

  

  The 
  dimensions 
  of 
  the 
  shell 
  depicted 
  in 
  the 
  figure 
  are 
  : 
  — 
  

   Height 
  2'06, 
  width 
  0*87 
  mm. 
  ; 
  the 
  smallest 
  apparently 
  mature 
  

   specimen 
  that 
  I 
  have 
  measured 
  being 
  1*67 
  high 
  and 
  0'8L 
  mm. 
  

   wide, 
  and 
  having 
  only 
  about 
  6^ 
  whorls. 
  

  

  Var. 
  livingstonce, 
  Burnup. 
  

  

  A 
  new 
  locality 
  may 
  be 
  recorded 
  for 
  both 
  the 
  typical 
  form 
  

   and 
  the 
  var., 
  viz. 
  Stander's 
  Kop, 
  Transvaal 
  (Connolly). 
  

  

  The 
  type 
  of 
  the 
  var., 
  said 
  to 
  be 
  in 
  my 
  collection, 
  has 
  since 
  

   been 
  transferred 
  to 
  the 
  British 
  Museum 
  with 
  the 
  types 
  of 
  the 
  

   other 
  new 
  forms 
  described 
  in 
  the 
  Survey. 
  Its 
  dimensions 
  

   are: 
  — 
  Height 
  2'02, 
  width 
  0*84 
  mm. 
  

  

  12. 
  Pupa 
  layardi, 
  Benson. 
  (PI. 
  X. 
  figs. 
  3, 
  4.) 
  

  

  The 
  fig. 
  presented 
  by 
  Melv. 
  & 
  Pons, 
  does 
  not 
  express 
  the 
  

   detail 
  with 
  sufficient 
  accuracy 
  for 
  the 
  purposes 
  of 
  comparison 
  ; 
  

   I 
  therefore 
  take 
  this 
  opportunity 
  of 
  offering 
  new 
  figures 
  for 
  

   comparison 
  with 
  those 
  of 
  ? 
  layardi, 
  var. 
  minor, 
  Bens. 
  

   (?=P. 
  stoaphora, 
  Bens.), 
  and 
  P. 
  crawfordiana 
  (M. 
  & 
  P.) 
  on 
  

   same 
  plate. 
  

  

  The 
  shells 
  chosen 
  for 
  my 
  illustrations 
  do 
  not 
  include 
  that 
  

   figured 
  by 
  Melvill 
  and 
  Ponsonby, 
  though 
  Mr. 
  Ponsonby 
  

   kindly 
  laid 
  his 
  shell 
  at 
  my 
  disposal 
  for 
  the 
  purpose. 
  They 
  

   are 
  chosen 
  from 
  a 
  series 
  collected 
  at 
  Hermanus, 
  Caledon 
  

   Division, 
  in 
  the 
  Cape 
  Province, 
  by 
  Mr. 
  R. 
  M. 
  Lightfoot, 
  as 
  

   being 
  fresher 
  shells 
  than 
  his, 
  free 
  from 
  extraneous 
  matter 
  in 
  

   the 
  aperture, 
  and 
  more 
  nearly 
  approaching 
  the 
  size 
  and 
  

   proportions 
  of 
  Benson's 
  type. 
  In 
  all 
  essential 
  characters 
  

   they 
  agree 
  closely 
  with 
  the 
  shells 
  given 
  to 
  Mr. 
  Ponsonby 
  by 
  

   Mr. 
  Benson. 
  

  

  Since 
  the 
  peristome 
  is 
  not 
  at 
  all 
  thickened 
  at 
  the 
  edge, 
  but, 
  

   on 
  the 
  contrary, 
  is 
  remarkably 
  thin 
  and 
  brittle, 
  the 
  lips 
  are 
  

   invariably 
  more 
  or 
  less 
  chipped. 
  One 
  of 
  the 
  most 
  conspicuous 
  

   differences 
  between 
  the 
  present 
  species 
  and 
  P. 
  crawfordiana, 
  

   M. 
  & 
  P., 
  is 
  the 
  absence 
  from 
  the 
  latter 
  of 
  the 
  trumpet-like 
  

   extension 
  of 
  the 
  peristome 
  observable 
  in 
  the 
  former. 
  

  

  The 
  dimensions 
  of 
  the 
  specimens 
  here 
  figured 
  are 
  as 
  

   follows 
  : 
  — 
  

  

  Fig. 
  3. 
  Height 
  7*87, 
  width 
  3'26 
  mm. 
  

  

  Fig. 
  4. 
  „ 
  7-87, 
  „ 
  3-67 
  „ 
  

  

  The 
  shells 
  of 
  this 
  species 
  may 
  be 
  either 
  white 
  or 
  horn- 
  

   colour, 
  and 
  the 
  position 
  of 
  the 
  seventh 
  peristomatal 
  process, 
  

  

  