﻿South- 
  African 
  Land~Mollusca. 
  453 
  

  

  time 
  or 
  other, 
  be 
  able 
  to 
  collect 
  a 
  similar 
  number 
  in 
  this 
  

   way 
  in 
  many 
  localities. 
  

  

  An 
  organ 
  of 
  great 
  interest 
  is 
  the 
  spermatophore 
  ; 
  it 
  is 
  very 
  

   distinctive 
  in 
  the 
  Peltatinse. 
  If 
  we 
  knew 
  what 
  amount 
  of 
  

   variation 
  ttiere 
  may 
  be 
  in 
  well-known 
  species 
  of 
  the 
  three 
  

   genera 
  — 
  whether 
  in 
  a 
  batch 
  of 
  the 
  same 
  species, 
  taken 
  at 
  the 
  

   same 
  time 
  and 
  in 
  the 
  same 
  place, 
  the 
  spermatophores 
  proved 
  

   constant 
  in 
  form^ 
  — 
  we 
  should 
  have 
  a 
  very 
  valuable 
  character, 
  

   both 
  generic 
  and 
  specific. 
  The 
  labour 
  of 
  examination 
  would 
  

   no 
  doubt 
  be 
  great, 
  both 
  in 
  finding 
  and 
  drawing 
  the 
  organ 
  ; 
  

   yet 
  it 
  would 
  be 
  worth 
  doing, 
  and 
  in 
  these 
  pages 
  will 
  be 
  

   found 
  sometliing 
  to 
  start 
  on. 
  

  

  The 
  following 
  alterations 
  have 
  to 
  be 
  made 
  in 
  the 
  Explana- 
  

   tion 
  of 
  Plates, 
  already 
  published 
  in 
  Part 
  I. 
  ('Annals' 
  for 
  

   January 
  1912) 
  and 
  Part 
  II. 
  (' 
  Annals' 
  for 
  May 
  1912) 
  :— 
  

  

  Part 
  I. 
  

  

  Plate 
  i. 
  figs. 
  1-1 
  b. 
  Kerkophorus 
  corneus 
  ? 
  Maritzljvxrg 
  : 
  

   is 
  bicolor, 
  sp. 
  u. 
  

  

  Plate 
  ii. 
  tigs. 
  2-2 
  b 
  (No. 
  15) 
  K., 
  sp. 
  n. 
  ? 
  Maritzburg 
  : 
  

   is 
  K. 
  burnupi, 
  sp. 
  n. 
  

  

  Plate 
  ii. 
  tigs. 
  3-3 
  a 
  (No. 
  3379), 
  K., 
  sp. 
  n. 
  ?, 
  undetermined. 
  Pinetowu 
  : 
  

   is 
  K, 
  poeppigi, 
  Mke. 
  (animal). 
  

  

  Part 
  II. 
  

  

  Plate 
  xii. 
  tigs. 
  1-1 
  h. 
  K. 
  poeppigi, 
  Mke. 
  ? 
  Pine 
  Town, 
  near 
  Durban 
  

   (No. 
  3379) 
  : 
  

  

  is 
  poeppigi. 
  

   Plate 
  XV. 
  figs. 
  1-1 
  d. 
  K. 
  ampliata, 
  M. 
  & 
  P. 
  (No. 
  7) 
  : 
  

  

  is 
  K. 
  ? 
  natalensis, 
  Krs. 
  Maritzburg. 
  

  

  I 
  give 
  the 
  original 
  descriptions 
  of 
  the 
  first 
  species 
  obtained 
  

   by 
  Menke 
  and 
  Krauss. 
  It 
  is 
  unfortunate 
  that 
  from 
  their 
  

   habitat, 
  Durban, 
  I 
  have 
  only 
  been 
  able 
  to 
  examine 
  the 
  

   animal 
  of 
  one, 
  determined 
  as 
  poeppigi, 
  from 
  Pinetown, 
  near 
  

   to 
  Durban, 
  it 
  would 
  be 
  most 
  interesting 
  to 
  get 
  a 
  good 
  

   full-grown 
  animal 
  of 
  K. 
  natalensis, 
  for 
  I 
  have 
  only 
  had 
  for 
  

   examination 
  a 
  young 
  specimen 
  from 
  Equeefa, 
  agreeing 
  best 
  

   with 
  the 
  typical 
  form. 
  

  

  Vitrina 
  poeppigii, 
  Menke. 
  

  

  Symbolae, 
  iii. 
  1846, 
  p. 
  81. 
  

  

  " 
  T. 
  imperforata, 
  globulosa, 
  tenuissima, 
  striatula, 
  nitida, 
  pellucida, 
  

   lutesceati-cornea, 
  liuea 
  1 
  rufa 
  supra 
  peripheriam 
  ciucba 
  ; 
  spira 
  

   brevissima, 
  obtusa 
  ; 
  sutura 
  submarginata 
  ; 
  anfr. 
  4, 
  convexiusculi, 
  

   ultimus 
  inflatus 
  ; 
  apertura 
  rotundato-lunaris, 
  margine 
  dextro 
  

   subrepando, 
  columellari 
  leviter 
  arcuato, 
  subverticaliter 
  desceii- 
  

   deiite. 
  

  

  "Diam. 
  maj. 
  10^, 
  min. 
  9, 
  alt. 
  7 
  mm." 
  

  

  