﻿PRESTON 
  : 
  ON 
  LAND 
  SHELLS 
  FEOM 
  ANGOLA, 
  55 
  

  

  callus 
  joining 
  it 
  with 
  the 
  lip 
  above; 
  labrum 
  thin, 
  acute; 
  aperture 
  

   ovate. 
  Alt. 
  8*5, 
  diam. 
  maj. 
  2-5 
  mm.; 
  aperture, 
  alt. 
  l-5,diam. 
  1mm. 
  

  

  I 
  

  

  Hah. 
  — 
  Two 
  hundred 
  miles 
  due 
  east 
  of 
  Loanda, 
  Angola. 
  

   Type 
  in 
  British 
  Museum. 
  

  

  A 
  very 
  beautiful 
  little 
  species, 
  of 
  which 
  only 
  two 
  specimens 
  were 
  

   obtained, 
  both 
  being 
  in 
  the 
  Britisli 
  Museum. 
  

  

  Afertjlus 
  intermedius. 
  Martens,' 
  var. 
  Angolensis, 
  n.var. 
  

  

  Separable 
  from 
  the 
  typical 
  form 
  by 
  its 
  closer 
  coiling, 
  narrower 
  

   body-whorl, 
  somewhat 
  wider 
  and 
  more 
  circular 
  aperture, 
  and 
  by 
  the 
  

   reflection 
  of 
  the 
  columellar 
  lip 
  ; 
  though 
  banded 
  it 
  is 
  also 
  separable 
  

   from 
  the 
  var. 
  cingulatus, 
  Dupuis 
  & 
  Putzeys,^ 
  by 
  the 
  above 
  characters. 
  

   Alt. 
  15 
  mm., 
  diam. 
  maj. 
  17, 
  min. 
  13 
  mm.; 
  aperture, 
  alt. 
  9, 
  diam. 
  

   8"5 
  mm. 
  

  

  Hah. 
  — 
  Two 
  hundred 
  miles 
  due 
  east 
  of 
  Loanda, 
  Angola. 
  

  

  The 
  above 
  variety 
  is 
  described 
  largely 
  upon 
  geographical 
  grounds 
  ; 
  

   the 
  species 
  would 
  appear 
  to 
  have 
  a 
  verj^ 
  wide 
  range 
  ; 
  the 
  typical 
  form 
  

   from 
  Uganda 
  is 
  unicolorous, 
  though 
  the 
  banded 
  form 
  described 
  as 
  

   var. 
  cingulatus, 
  from 
  Nsendwe 
  on 
  the 
  Upper 
  Congo, 
  also 
  occurs 
  in 
  the 
  

   former 
  region. 
  Taking 
  into 
  account 
  its 
  present 
  occurrence 
  within 
  

   200 
  miles 
  of 
  the 
  Atlantic 
  seaboard 
  it 
  would 
  thus 
  seem 
  to 
  range 
  some 
  

   1400 
  miles 
  in 
  a 
  west-south-westerly 
  direction. 
  

  

  Among 
  other 
  specimens 
  of 
  the 
  genus 
  in 
  the 
  British 
  Museum 
  are 
  two 
  

   sets, 
  one 
  from 
  Uganda, 
  the 
  other 
  from 
  Ruwenzori, 
  labelled 
  A. 
  elatior, 
  

   V. 
  Mrts.^ 
  After 
  a 
  careful 
  examination 
  I 
  cannot 
  but 
  think, 
  however, 
  

   that 
  these 
  are 
  other 
  than 
  A. 
  intermedius, 
  var. 
  cingulatus; 
  the 
  latter 
  

   set 
  have 
  been 
  recently 
  recorded 
  under 
  the 
  name 
  of 
  elatior 
  in 
  Mr. 
  E. 
  A. 
  

   Smith's 
  paper 
  on 
  the 
  Ruwenzori 
  Expedition.* 
  

  

  1 
  Von 
  Martens 
  in 
  Deutsch 
  Ost 
  Africa, 
  vol. 
  iv, 
  p. 
  8. 
  

  

  2 
  Bull. 
  Soc. 
  Eoy. 
  Make. 
  Belgique, 
  1901, 
  pp. 
  xli, 
  xlii. 
  

  

  3 
  Sitzungsberichte 
  der 
  Ges. 
  uaturf. 
  Freunde 
  zu 
  Berlin, 
  1892, 
  p. 
  180. 
  

   * 
  Trans. 
  Zool. 
  Soc. 
  London, 
  vol. 
  xix, 
  pt. 
  i, 
  p. 
  47. 
  

  

  