﻿new 
  Shells 
  from 
  British 
  East 
  Africa. 
  469 
  

  

  Alt. 
  1*5, 
  tliam. 
  maj. 
  2'75, 
  diam. 
  min. 
  2*25 
  mm. 
  

   Aperture: 
  alt. 
  '5, 
  diam. 
  '5 
  mm. 
  

  

  Bab. 
  Mount 
  Kenia, 
  at 
  an 
  altitude 
  of 
  9000-10,000 
  feet, 
  

   British 
  East 
  Africa. 
  

  

  Acanthinida 
  expatriata, 
  sp. 
  n. 
  (Fig. 
  17.) 
  

  

  Shell 
  globosely 
  turbinate, 
  with 
  elevated 
  spire, 
  thin, 
  covered 
  

   with 
  a 
  shining 
  pale 
  bronze 
  periostracum, 
  which 
  is 
  raised 
  on 
  

   the 
  later 
  whorls 
  into 
  rather 
  distant, 
  regular, 
  very 
  oblique 
  

   ridges, 
  each 
  ridge 
  bearing 
  a 
  coarse, 
  long, 
  broad-based, 
  mem- 
  

   branaceous 
  bristle 
  at 
  the 
  periphery 
  j 
  whorls 
  4, 
  rapidly 
  in- 
  

   creasing, 
  convex 
  ; 
  suture 
  deeply 
  impressed 
  ; 
  base 
  of 
  shell 
  

   convex, 
  showing 
  traces 
  of 
  very 
  tine, 
  spiral 
  sculpture 
  between 
  

   the 
  ridges 
  of 
  the 
  periostracum 
  ; 
  umbilicus 
  narrow, 
  very 
  deep, 
  

   partly 
  concealed 
  by 
  the 
  expansion 
  of 
  the 
  outer 
  margin 
  of 
  the 
  

   columella 
  ; 
  columella 
  descending 
  in 
  an 
  oblique 
  curve 
  and 
  

   diffused 
  above 
  into 
  a 
  whitish, 
  parietal 
  callus, 
  both 
  it 
  and 
  the 
  

   labrum 
  white, 
  slightly 
  reflexed 
  and 
  outwardly 
  broadly 
  

   surrounded 
  by 
  a 
  reflexed 
  extension 
  of 
  the 
  membranaceous 
  

   periostracum, 
  thus 
  forming 
  a 
  double 
  margin 
  ; 
  aperture 
  sub- 
  

   circular. 
  

  

  Alt. 
  nearly 
  2*5, 
  diam. 
  maj. 
  2 
  mm. 
  

  

  Hab. 
  Mount 
  Kenia, 
  at 
  an 
  altitude 
  of 
  9000-10,000 
  feet, 
  

   British 
  East 
  Africa.. 
  

  

  Eachis 
  virginea, 
  sp. 
  n. 
  (Fig. 
  18.) 
  

  

  Shell 
  acuminately 
  ovate, 
  thin, 
  the 
  earlier 
  whorls 
  flesh- 
  

   coloured, 
  the 
  later 
  whorls 
  cream-coloured, 
  occasionally 
  spotted 
  

   with 
  reddish 
  purple 
  ; 
  whorls 
  5^, 
  rather 
  flat, 
  the 
  last 
  angulate 
  

   at 
  the 
  periphery, 
  marked 
  with 
  transverse 
  growth 
  lines 
  and 
  

   very 
  fine, 
  spiral 
  striae, 
  these 
  latter 
  becoming 
  more 
  marked 
  on 
  

   the 
  base 
  of 
  the 
  shell 
  ; 
  suture 
  impressed 
  ; 
  columella 
  obliquely 
  

   outwardly 
  curved 
  below, 
  reflexed 
  and 
  expanded 
  into 
  a 
  thin 
  

   callus; 
  peristome 
  simple; 
  aperture 
  ovate. 
  

  

  Alt. 
  14, 
  diam. 
  maj. 
  9*5, 
  diam. 
  min. 
  7 
  mm. 
  

  

  Aperture: 
  alt. 
  7*5, 
  diam. 
  45 
  mm. 
  

  

  Hab. 
  Mount 
  Kenia, 
  at 
  an 
  altitude 
  of 
  6000-8000 
  feet, 
  

   British 
  East 
  Africa. 
  

  

  Rachis 
  turricula, 
  sp. 
  n. 
  (Fig. 
  19.) 
  

  

  Shell 
  elongately 
  turrite, 
  perforate, 
  thin, 
  corneous, 
  polished, 
  

   pale 
  yellowish 
  brown 
  ; 
  whorls 
  7, 
  the 
  last 
  two 
  rather 
  rapidly 
  

   increasing, 
  marked 
  with 
  fine, 
  oblique 
  lines 
  of 
  growth 
  ; 
  suture 
  

   impressed 
  ; 
  umbilicus 
  very 
  narrow 
  ; 
  columella 
  vertically 
  

  

  