﻿410 
  Mr. 
  H. 
  C. 
  Burnup 
  on 
  South- 
  African 
  

  

  Survey, 
  is 
  the 
  only 
  specimen 
  of 
  this 
  species 
  that 
  I 
  have 
  

   seen. 
  Its 
  nearest 
  ally 
  seems 
  to 
  be 
  P. 
  dysorata, 
  M. 
  & 
  P., 
  which 
  

   it 
  strongly 
  resembles 
  in 
  its 
  remarkably 
  cylindrical 
  form, 
  but 
  

   from 
  which 
  it 
  may 
  easily 
  be 
  distinguished 
  by 
  its 
  greater 
  

   length, 
  comparative 
  narrowness, 
  rounder 
  aperture, 
  and 
  much 
  

   finer 
  sculpture. 
  

  

  18. 
  Pupa 
  sykesi,lSl. 
  & 
  P. 
  

   Var. 
  inconspieua, 
  Burnup. 
  

  

  Although, 
  while 
  differentiating 
  inconspieua 
  from 
  sykesi, 
  

   M. 
  & 
  P., 
  from 
  the 
  material 
  then 
  at 
  my 
  disposal, 
  I 
  considered 
  

   it 
  to 
  be 
  a 
  distinct 
  species, 
  I 
  can 
  now 
  only 
  concur 
  with 
  Melv. 
  

   & 
  Pons, 
  in 
  treating 
  them 
  as 
  one. 
  In 
  coming 
  to 
  this 
  decision 
  

   I 
  am 
  largely 
  indebted 
  to 
  Dr. 
  R. 
  Sturany, 
  who 
  not 
  only 
  iden- 
  

   tified 
  for 
  me 
  specimens 
  from 
  Dukuduku 
  Forest, 
  Zululand, 
  

   as 
  being 
  P. 
  pentheri, 
  Stur., 
  but 
  also 
  sent 
  me 
  co-types 
  of 
  his 
  

   species 
  collected 
  by 
  Dr. 
  Penther 
  at 
  Umbilo 
  Road, 
  Durban. 
  

   His 
  specimens 
  are 
  somewhat 
  intermediate 
  between 
  sykesi, 
  

   M. 
  & 
  P., 
  and 
  inconspieua, 
  Burnup, 
  and 
  leave 
  no 
  doubt 
  as 
  to 
  

   all 
  three 
  forms 
  belonging 
  to 
  one 
  species. 
  P. 
  pentheri 
  must 
  

   therefore 
  be 
  placed 
  in 
  the 
  synonymy 
  of 
  sykesi, 
  and 
  incon- 
  

   spieua 
  may 
  be 
  retained 
  as 
  an 
  elongate, 
  narrow, 
  fusiform 
  

   variety 
  of 
  the 
  same 
  species. 
  

  

  In 
  adopting 
  my 
  description 
  of 
  the 
  var. 
  inconspieua 
  in 
  its 
  

   entirety 
  to 
  represent 
  their 
  species, 
  Melvill 
  and 
  Ponsonby 
  are 
  

   led 
  into 
  certain 
  errors, 
  in 
  that 
  their 
  type 
  is 
  more 
  conic 
  and 
  

   less 
  fusiform 
  than 
  the 
  var., 
  and 
  has 
  only 
  about 
  6| 
  whorls 
  

   instead 
  of 
  1\, 
  while 
  the 
  aperture 
  is 
  more 
  than, 
  instead 
  of 
  

   nearly, 
  £ 
  of 
  the 
  height 
  of 
  the 
  shell 
  ; 
  besides 
  which 
  the 
  dimen- 
  

   sions 
  given 
  do 
  not 
  refer 
  to 
  the 
  type, 
  which 
  measures 
  : 
  — 
  

  

  Height 
  1-82, 
  width 
  OS3. 
  _ 
  

  

  It 
  may 
  be 
  noted 
  that 
  while 
  the 
  height 
  of 
  inconspieua 
  is 
  

   greater 
  than 
  that 
  of 
  the 
  type, 
  the 
  width 
  is 
  less. 
  As 
  this 
  

   attenuate 
  form 
  has 
  so 
  far 
  only 
  been 
  met 
  with 
  at 
  Dargle, 
  it 
  

   may 
  well 
  be 
  a 
  local 
  race. 
  

  

  19. 
  Pupa 
  tabular 
  is, 
  M. 
  & 
  P. 
  

  

  The 
  dimensions 
  of 
  the 
  figured 
  specimen, 
  which 
  is 
  in 
  

   Mr. 
  Ponsonby's 
  collection, 
  are 
  not 
  given 
  in 
  the 
  Survey. 
  

   They 
  are 
  as 
  follows 
  : 
  — 
  

  

  Height 
  3'63, 
  breadth 
  1*88 
  mm. 
  

  

  20. 
  Pupa 
  tetrodus, 
  Bttg. 
  

  

  1870. 
  Pupa 
  tetrodus, 
  Bttg. 
  Ber. 
  Offenbach. 
  Ver. 
  Naturk, 
  xi. 
  p. 
  46, 
  

   pi. 
  i. 
  figs. 
  1 
  a-c. 
  

  

  