﻿4G6 
  Mr. 
  II. 
  B. 
  Preston 
  on 
  

  

  Alt. 
  4*5, 
  diam. 
  maj. 
  2'5 
  ram. 
  

  

  Aperture: 
  alt. 
  1, 
  diam. 
  "5 
  mm. 
  

  

  Hab. 
  Between 
  Rumruti 
  and 
  Mount 
  Kenia, 
  Biitish 
  East 
  

   Africa 
  ; 
  specimens 
  were 
  also 
  taken 
  on 
  Mount 
  Kenia 
  itself 
  at 
  

   an 
  altitude 
  of 
  from 
  6000-8000 
  feet. 
  

  

  The 
  sculpture 
  of 
  the 
  species 
  is 
  very 
  beautiful, 
  and 
  under 
  a 
  

   lens 
  recalls 
  that 
  of 
  some 
  of 
  the 
  more 
  distantly 
  costulate 
  

   Scalarice. 
  

  

  Ennea 
  princei, 
  sp. 
  n. 
  (Fig. 
  7.) 
  

  

  Shell 
  cylindrically 
  ovate, 
  perforate, 
  cream-coloured 
  ; 
  

   whorls 
  7, 
  the 
  first 
  five 
  rapidly 
  increasing, 
  the 
  last 
  ascending 
  

   in 
  front, 
  closely 
  obliquely 
  transversely 
  striate; 
  suture 
  im- 
  

   pressed 
  ; 
  umbilicus 
  moderately 
  narrow, 
  deep 
  ; 
  peristome 
  

   nearly 
  continuous, 
  white, 
  narrowly 
  reflexed 
  ; 
  aperture 
  irregu- 
  

   larly 
  rectangular, 
  armed 
  with 
  an 
  almost 
  vertical 
  parietal 
  

   lamella; 
  a 
  large 
  projecting 
  denticle 
  on 
  the 
  outer 
  lip, 
  opposite 
  

   which 
  is 
  situate 
  a 
  similar 
  denticle 
  of 
  about 
  equal 
  size 
  on 
  the 
  

   columella. 
  

  

  Alt. 
  4, 
  diam. 
  maj. 
  2*25 
  mm. 
  

  

  Aperture 
  : 
  alt. 
  1, 
  diam. 
  nearly 
  '75 
  mm. 
  

  

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

   British 
  East 
  Africa. 
  

  

  Eitnca 
  swiph'cima, 
  sp. 
  n. 
  (Fig. 
  8.) 
  

  

  Shell 
  cylindrical, 
  very 
  thin, 
  almost 
  membranaceous, 
  per- 
  

   forate, 
  pale 
  greenish 
  white 
  ; 
  whorls 
  6, 
  the 
  first 
  four 
  rapidly 
  

   increasing, 
  transversely 
  striate, 
  the 
  stria? 
  becoming 
  obsolete 
  

   on 
  the 
  later 
  whorls 
  ; 
  suture 
  well 
  impressed 
  ; 
  umbilicus 
  very 
  

   narrow, 
  nearly 
  concealed 
  by 
  the 
  outward 
  expansion 
  of 
  the 
  

   columella; 
  columella 
  descending 
  obliquely, 
  a 
  thin 
  white 
  

   callus 
  joining 
  it 
  with 
  the 
  lip 
  above 
  ; 
  labrum 
  thin, 
  white, 
  

   scarcely 
  reflexed 
  ; 
  aperture 
  broadly 
  and 
  shortly 
  inversely 
  

   auriform, 
  edentulate. 
  

  

  Alt. 
  5, 
  diam. 
  maj. 
  2 
  mm. 
  

  

  Aperture: 
  alt. 
  1, 
  diam. 
  '75 
  mm. 
  

  

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

   British 
  East 
  Africa. 
  

  

  Ihapaia 
  rumrutiensis, 
  sp. 
  n. 
  (Fig. 
  9.) 
  

  

  Shell 
  perforate, 
  small, 
  depressedly 
  turbinate, 
  moderately 
  

   solid, 
  dark 
  straw-colour 
  ; 
  whorls 
  3£, 
  rather 
  rapidly 
  increasing, 
  

   marked 
  with 
  lines 
  of 
  growth, 
  the 
  last 
  angled 
  at 
  the 
  periphery 
  ; 
  

   suture 
  impressed 
  ; 
  base 
  of 
  shell 
  somewhat 
  inflated, 
  sculptured 
  

  

  