﻿Species 
  and 
  Varieties 
  of 
  Pupa. 
  415 
  

  

  26. 
  Pupa 
  {Fauxulus) 
  pereximia 
  (M. 
  & 
  P.). 
  

  

  27. 
  Pupa 
  (Fauxulus) 
  ponsonbyana 
  (Morelet). 
  

   (Pi. 
  X. 
  figs. 
  9-12.) 
  

  

  As 
  Morelet' 
  s 
  description 
  and 
  original 
  figure* 
  do 
  not 
  clearly 
  

   define 
  the 
  positions, 
  nor 
  even 
  the 
  number, 
  of 
  the 
  peristomatal 
  

   processes 
  with 
  distinctness, 
  and, 
  moreover, 
  his 
  figure, 
  if 
  cor- 
  

   rectly 
  drawn, 
  depicts 
  an 
  imperfect 
  shell 
  with 
  the 
  edges 
  of 
  

   the 
  peristome 
  chipped 
  off, 
  a 
  new 
  series 
  of 
  figures 
  is 
  here 
  

   offered, 
  which 
  it 
  is 
  hoped 
  will 
  define 
  the 
  species 
  sufficiently 
  

   clearly 
  to 
  obviate 
  the 
  necessity 
  of 
  revising 
  the 
  description. 
  

   The 
  figures 
  are 
  drawn 
  from 
  four 
  shells 
  from 
  Grahamstown, 
  

   kindly 
  supplied 
  to 
  me 
  by 
  Messrs. 
  Ponsonby 
  and 
  Farquhar, 
  

   and 
  show 
  to 
  some 
  extent 
  the 
  variability 
  in 
  size 
  and 
  general 
  

   form 
  of 
  this 
  very 
  interesting 
  little 
  species. 
  The 
  measure- 
  

   ments 
  of 
  a 
  few 
  other 
  shells 
  are 
  given, 
  below 
  the 
  dimensions 
  

   of 
  the 
  figured 
  specimens, 
  showing 
  the 
  extremes 
  of 
  such 
  shells 
  

   as 
  I 
  have 
  examined. 
  

  

  Fig. 
  9. 
  Height 
  3'43, 
  width 
  1*71 
  mm. 
  

   „ 
  10. 
  „ 
  3-05, 
  „ 
  1-43 
  „ 
  

   ,, 
  11. 
  „ 
  ^'J7, 
  ,, 
  1*55 
  ,, 
  

   ,, 
  12 
  : 
  „ 
  2-81, 
  „ 
  1-43 
  „ 
  

   Dimensions 
  of 
  a 
  few 
  other 
  specimens 
  : 
  — 
  ■ 
  

   Height 
  3*52, 
  width 
  1*52 
  mm. 
  

   „ 
  3*59, 
  „ 
  1*86 
  ,, 
  

   ,, 
  o'oo, 
  ,, 
  1*73 
  ,, 
  

   „ 
  2-84, 
  „ 
  1-42 
  „ 
  

   „ 
  2-74, 
  „ 
  1-43 
  „ 
  

   The 
  crown 
  of 
  little 
  hairs 
  about 
  the 
  middle 
  of 
  the 
  last 
  

   whorl, 
  referred 
  to 
  by 
  Ancey 
  [Journ. 
  de 
  Conch, 
  vol. 
  xlix. 
  

   (1901) 
  p. 
  141], 
  arises 
  in 
  the 
  peripheral 
  sulcus 
  and 
  extends 
  

   upwards 
  in 
  the 
  suture, 
  but 
  the 
  hairs 
  are 
  very 
  easily 
  rubbed 
  

   off. 
  They 
  are 
  not 
  shown 
  iti 
  the 
  figures, 
  because 
  washing, 
  so 
  

   ntcessary 
  to 
  obtain 
  a 
  clear 
  view 
  of 
  the 
  peristomatal 
  processes 
  

   and 
  a 
  correct 
  estimate 
  of 
  the 
  depth 
  of 
  the 
  sculpture 
  and 
  

   suture, 
  has 
  removed 
  every 
  vestige 
  of 
  the 
  hairy 
  coronet. 
  I 
  

   have 
  examined 
  many 
  specimens 
  and 
  have 
  found 
  the 
  number 
  

   of 
  peristomatal 
  processes, 
  in 
  addition 
  to 
  the 
  two 
  parietals, 
  to 
  

   be 
  invariably 
  seven. 
  

  

  So 
  far 
  1 
  have 
  only 
  collected 
  two 
  specimens 
  in 
  Natal 
  (at 
  

  

  * 
  Journ. 
  de 
  Conch, 
  vol. 
  xxxvii. 
  (1889) 
  pp. 
  9, 
  10, 
  pi. 
  i. 
  fig. 
  5 
  [Pupa 
  

   (Faula) 
  ponsonbyana, 
  Morelet]. 
  

  

  