﻿CONNOLT.r 
  : 
  ON 
  OPEAS 
  STHIGILE 
  AND 
  ITS 
  ALLIES. 
  

  

  143 
  

  

  sliglitly 
  outward, 
  base 
  narrowly 
  rounded; 
  columella 
  nenrly 
  straight, 
  

   margin 
  triangularly 
  reflexed, 
  nearly 
  covering 
  the 
  rima. 
  

  

  Shell, 
  5-3 
  X 
  I-t"; 
  apert. 
  20 
  X 
  0-8; 
  last 
  whorl, 
  2-9 
  mm. 
  The 
  

   type 
  measured 
  7-25 
  x 
  2-0 
  mm. 
  

  

  Mab. 
  — 
  Natal. 
  Type 
  locality, 
  Karkloof 
  (McBean). 
  Since 
  collected 
  

   at 
  Karkloof 
  and 
  Fort 
  Nottingham 
  (Buruup). 
  

  

  Exceptfor 
  very 
  slight 
  variation 
  in 
  depth 
  of 
  sculpture 
  and 
  reflexion 
  

   of 
  columellar 
  margin, 
  all 
  the 
  specimens 
  wliicli 
  I 
  have 
  examined 
  agree 
  

   closely 
  with 
  the 
  co-type. 
  Another 
  shell 
  from 
  Karkloof 
  measures 
  

   6-5 
  X 
  2-0; 
  apert. 
  2-1 
  X 
  8; 
  last 
  whorl, 
  3-1 
  mm. 
  

  

  2 
  3 
  

  

  All 
  the 
  fmures 
  are 
  enliir"ed 
  seven 
  times. 
  

  

  Opeas 
  fanei, 
  sp. 
  nov. 
  Fig. 
  2. 
  

  

  Shell 
  small, 
  rimate, 
  acuminate, 
  thin, 
  smooth, 
  glossy, 
  transpai'ent, 
  

   pale 
  olivaceous. 
  Spire 
  much 
  produced, 
  sides 
  regularly 
  and 
  very 
  

   gradually 
  tapering, 
  apex 
  narrowly 
  rounded. 
  Whorls 
  8, 
  nearly 
  flat, 
  

   regularly 
  and 
  gradually 
  increasing, 
  the 
  two 
  apical 
  smooth, 
  remainder 
  

   covered 
  with 
  close, 
  faint, 
  regular, 
  curved, 
  transverse 
  striae, 
  which 
  

   are 
  only 
  visible 
  under 
  a 
  lens. 
  Suture 
  becoming 
  sub-filiform 
  about 
  

   the 
  6th 
  whorl. 
  Aperture 
  small, 
  ovate 
  ; 
  peristome 
  thin, 
  simple 
  ; 
  outer 
  

   lip 
  curved 
  forward 
  but 
  not 
  outward 
  ; 
  base 
  rounded 
  ; 
  columella 
  

   straight, 
  margin 
  narrowly 
  reflexed. 
  

  

  Shell, 
  7-5 
  X 
  1-7 
  ; 
  apert. 
  2-0 
  X 
  0-6; 
  last 
  whorl, 
  3-3 
  mm. 
  

  

  Hah. 
  — 
  Natal. 
  Pietermaritzburg; 
  Dargle 
  (Burnup). 
  

  

  Smoother 
  and 
  more 
  attenuate 
  than 
  0. 
  strigile, 
  with 
  flatter 
  whorls. 
  

   The 
  type, 
  which 
  is 
  selected 
  from 
  a 
  series 
  collected 
  at 
  Pietermaritzburg, 
  

   shows 
  the 
  utmost 
  growth 
  that 
  may 
  be 
  expected 
  in 
  this 
  species, 
  being 
  

   fully 
  a 
  millimetre 
  longer 
  than 
  the 
  generality 
  of 
  specimens. 
  The 
  

   Dargle 
  shells 
  differ 
  slightly 
  in 
  contour 
  from 
  those 
  from 
  Pietermaritz- 
  

   burg, 
  but 
  are 
  not 
  varietally 
  separable. 
  

  

  VOL. 
  XIII. 
  — 
  OCTOBER, 
  1919. 
  

  

  11 
  

  

  