﻿South- 
  African 
  Land-Mollusca. 
  4<51 
  

  

  curved, 
  approacliing 
  the 
  aculeate 
  form, 
  but 
  are 
  all 
  bicuspid 
  ; 
  

   the 
  outer 
  cusp 
  small 
  aud 
  very 
  much 
  below 
  the 
  poiut, 
  the 
  

   cusp 
  becomino- 
  notch-like 
  and 
  almost 
  disappearing 
  iu 
  the 
  

   smaller 
  teeth 
  next 
  the 
  margin 
  itself. 
  Formula 
  : 
  — 
  

  

  ?58 
  . 
  2 
  . 
  14 
  . 
  1 
  . 
  14 
  . 
  2 
  . 
  58?, 
  or 
  +64 
  . 
  1 
  . 
  64 
  + 
  . 
  

  

  Unfortunately 
  in 
  extracting 
  the 
  radula 
  the 
  laterals 
  were 
  

   broken 
  away 
  from 
  the 
  centre 
  position, 
  and 
  thus 
  their 
  exact 
  

   number 
  could 
  not 
  be 
  counted 
  ; 
  but 
  it 
  does 
  not 
  very 
  much 
  

   exceed 
  fifty 
  -eight. 
  

  

  Three 
  specimens 
  have 
  since 
  been 
  recorded 
  by 
  Mr. 
  Burnup 
  

   taken 
  in 
  the 
  same 
  locality 
  : 
  one 
  is 
  darker 
  — 
  that 
  is, 
  on 
  the 
  

   visceral 
  sac 
  there 
  is 
  rather 
  more 
  black 
  marking 
  and 
  no 
  white 
  

   specks 
  towards 
  the 
  apex; 
  the 
  two 
  others 
  have 
  less 
  black 
  

   mottling 
  and 
  fine 
  spotting. 
  

  

  With 
  the 
  second 
  lot 
  of 
  this 
  species 
  Mr. 
  Burnup, 
  writing 
  

   to 
  Mr. 
  .lohn 
  Ponsonby, 
  says: 
  — 
  "As 
  this 
  is 
  one 
  of 
  our 
  

   darkest 
  Helicarions, 
  I 
  don't 
  think 
  it 
  likely 
  to 
  be 
  corneas, 
  

   Pfr., 
  which 
  is 
  descrilied 
  as 
  pale 
  horn-colour. 
  Anyone 
  

   describing 
  the 
  shell 
  would 
  be 
  bound 
  to 
  observe 
  the 
  difference 
  

   in 
  shade 
  above 
  and 
  below 
  the 
  peripheral 
  band. 
  The 
  same 
  

   feature 
  is 
  observable 
  less 
  conspicuouslv 
  in 
  the 
  Tongaat 
  form 
  

   { 
  = 
  G. 
  A. 
  24).'^ 
  

  

  Kerkophorus 
  bicolor, 
  sp. 
  n. 
  

  

  Locality. 
  Townbush, 
  Maritzburg 
  (No. 
  3418, 
  Burnup). 
  

  

  Animal. 
  — 
  The 
  further 
  specimens 
  received 
  have 
  a 
  tinge 
  of 
  

   pale 
  sap-green. 
  The 
  lobe 
  over 
  the 
  mucous 
  gland 
  is 
  very 
  long 
  

   • 
  and 
  pointed, 
  similar 
  to 
  Kerkophoj'us 
  phcediinus. 
  The 
  right 
  

   shell-lobe 
  is 
  moderately 
  narrow, 
  long 
  and 
  attenuate, 
  and 
  thus 
  

   differs 
  from 
  K. 
  phcedimus 
  and 
  also 
  from 
  tongnatensis 
  ; 
  the 
  

   left 
  shell-lobe 
  elongately 
  triangular, 
  rather 
  broad 
  at 
  base, 
  as 
  

   in 
  No. 
  15, 
  K. 
  burnupi, 
  and 
  3379. 
  In 
  the 
  visceral 
  sac 
  the 
  

   apical 
  whorls 
  are 
  brown, 
  the 
  branchial 
  wall 
  sparsely 
  spotted 
  

   or 
  splashed 
  with 
  black 
  ; 
  a 
  conspicuous 
  black 
  band 
  above 
  the 
  

   region 
  of 
  the 
  heart, 
  a 
  very 
  few 
  distant 
  white 
  specks 
  on 
  the 
  

   succeeding 
  portion 
  up 
  to 
  the 
  apex. 
  

  

  Generative 
  organs 
  as 
  in 
  No. 
  12 
  ; 
  the 
  free 
  oviduct 
  pink, 
  

   very 
  conspicuous. 
  

  

  Jaw 
  with 
  no 
  central 
  projection. 
  

  

  Radula 
  formula 
  : 
  — 
  

  

  + 
  26 
  . 
  2 
  . 
  14 
  . 
  1 
  . 
  14 
  . 
  2 
  . 
  26 
  + 
  , 
  or 
  +42 
  . 
  1 
  . 
  42 
  + 
  . 
  

  

  Teeth 
  of 
  usual 
  form, 
  the 
  marginals 
  bicuspid, 
  the 
  inner 
  cusp 
  

   the 
  longest, 
  outermost 
  becoming 
  very 
  minute. 
  

  

  