﻿313 
  

  

  ON 
  A 
  NEW 
  SPECIES 
  OF 
  PHASIANELLA 
  FROM 
  SOUTH 
  AFRICA. 
  

  

  By 
  Edgak 
  a. 
  Smith, 
  I.S.O. 
  

  

  Bead 
  10th 
  March, 
  1911. 
  

  

  Five 
  species 
  of 
  Phasianella 
  are 
  known 
  from 
  South 
  Africa 
  — 
  Kochii, 
  

   Philippi, 
  elongata, 
  Krauss, 
  Capensis, 
  Dunker, 
  hicarinata, 
  Dunker, 
  and 
  

   neritina, 
  Dunker. 
  Krauss 
  has 
  also 
  quoted 
  temiis, 
  Philippi, 
  a 
  

   Mediterranean 
  form. 
  

  

  P. 
  Capensis, 
  licarinata, 
  and 
  neritina 
  are 
  easily 
  distinguishable, 
  but 
  

   there 
  is 
  much 
  difficulty 
  in 
  drawing 
  a 
  line 
  of 
  separation 
  between 
  Kochii 
  

   and 
  elongata, 
  and 
  the 
  latter 
  is 
  regarded 
  by 
  Pilsbry 
  — 
  and 
  not 
  rightly, 
  

   I 
  think 
  — 
  as 
  a 
  variety 
  of 
  the 
  Mediterranean 
  P.pulla. 
  Typical 
  examples 
  

   of 
  Kochii 
  and 
  elongata 
  are 
  easily 
  recognizable 
  by 
  their 
  form 
  alone, 
  

   but 
  the 
  Yariation 
  in 
  this 
  respect 
  is 
  so 
  gradual 
  that 
  it 
  is 
  easy 
  in 
  a 
  large 
  

   series 
  of 
  specimens 
  to 
  find 
  the 
  links 
  connecting 
  these 
  extreme 
  forms. 
  

   They 
  are 
  about 
  the 
  same 
  size, 
  and 
  much 
  larger 
  than 
  the 
  other 
  South 
  

   African 
  species. 
  P. 
  Capensis 
  is 
  only 
  half 
  the 
  size 
  and 
  has 
  a 
  longer 
  

   spire 
  in 
  proportion 
  to 
  the 
  aperture. 
  P. 
  hicarinata 
  is 
  distinguished 
  

   from 
  the 
  rest 
  of 
  the 
  species 
  by 
  the 
  spiral 
  striation, 
  and 
  P. 
  neritina 
  by 
  

   the 
  characteristic 
  oblique 
  lineation, 
  short 
  spire, 
  and 
  patulate 
  aperture, 
  

   and 
  oa 
  account 
  of 
  these 
  peculiarities 
  it 
  was 
  placed 
  in 
  a 
  new 
  genus, 
  

   Chromotis, 
  by 
  Messrs. 
  H. 
  & 
  A. 
  Adams' 
  in 
  1863. 
  A. 
  Adams 
  described 
  

   this 
  species 
  in 
  1850- 
  under 
  the 
  name 
  of 
  Gena 
  lineata, 
  and 
  it 
  has 
  been 
  

   figured 
  under 
  that 
  name 
  in 
  Sowerby's 
  Thesaurus 
  Conch., 
  vol, 
  ii, 
  pi. 
  173, 
  

   figs. 
  26, 
  27, 
  and 
  by 
  Pilsbry, 
  Manual 
  of 
  Conchology, 
  vol. 
  xii, 
  pi. 
  55, 
  

   figs. 
  17, 
  18, 
  copy 
  of 
  Sowerby. 
  Adams 
  at 
  the 
  time 
  did 
  not 
  know 
  its 
  

   locality. 
  

  

  The 
  great 
  variation 
  in 
  colour 
  in 
  some 
  species 
  of 
  Phasianella 
  is 
  most 
  

   remarkable, 
  and 
  it 
  occurs 
  notably 
  in 
  P. 
  Kochii, 
  elongata, 
  and 
  Capensis. 
  

   On 
  the 
  other 
  hand, 
  it 
  is 
  much 
  more 
  regular 
  and 
  characteristic 
  in 
  

   hicarinata 
  and 
  neritina 
  ; 
  also 
  in 
  the 
  species 
  about 
  to 
  be 
  described 
  

   there 
  is 
  considerable 
  uniformity. 
  

  

  Phasianella 
  Kraussi, 
  n.sp. 
  

  

  Testa 
  parva, 
  ovato-conoidea, 
  imperforata, 
  mediocriter 
  crassa, 
  vix 
  

   tenuis, 
  nitida, 
  rufo 
  et 
  lacteo 
  variegata 
  ; 
  spira 
  brevis, 
  ad 
  apicem 
  obtuse 
  

   rotundata 
  ; 
  anfractus 
  3|- 
  celeriter 
  accrescentes, 
  convexi, 
  ultimus 
  

   magnus 
  ; 
  sutura 
  simplex, 
  antice 
  valde 
  oblique 
  descendens 
  ; 
  apertura 
  

   magna, 
  ovata, 
  subpatula, 
  longitudinis 
  totius 
  \ 
  superans 
  ; 
  columella 
  

   arcuata, 
  callo 
  albo 
  induta. 
  Long. 
  5, 
  diam. 
  maj. 
  3*5 
  mm. 
  ; 
  apertura 
  

   2-75 
  mm. 
  longa, 
  2 
  lata. 
  

  

  Hah. 
  — 
  Kalk 
  Bay, 
  False 
  Bay, 
  Cape 
  of 
  Good 
  Hope. 
  

  

  A 
  bottle 
  containing 
  thousands 
  of 
  small 
  Phasianellas, 
  mostly 
  

   P. 
  Capensis, 
  was 
  very 
  kindly 
  handed 
  to 
  me 
  by 
  Miss 
  J. 
  M. 
  Beid 
  to 
  

   make 
  a 
  selection 
  of 
  specimens 
  for 
  the 
  Museum 
  collection. 
  Among 
  

   them 
  was 
  the 
  species 
  now 
  described, 
  and 
  the 
  very 
  many 
  examples 
  of 
  

  

  1 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  vol. 
  xi, 
  p. 
  19, 
  1863. 
  

  

  2 
  Proc. 
  Zool. 
  Soc, 
  1850, 
  p. 
  39. 
  

  

  