﻿46 
  4 
  Mr. 
  H. 
  B. 
  Preston 
  on 
  

  

  with 
  rather 
  coarse, 
  very 
  oblique, 
  transverse 
  stria? 
  ; 
  suture 
  

   somewhat 
  deeply 
  impressed; 
  labrum 
  sinuous, 
  white, 
  scarcely 
  

   reflexed, 
  the 
  margins 
  not 
  joined, 
  though 
  it 
  is 
  continued 
  for 
  

   some 
  distance 
  along 
  the 
  parietal 
  wall; 
  aperture 
  almost 
  irre- 
  

   gularly 
  triangular, 
  furnished 
  with 
  two 
  oblique 
  parietal 
  

   lamellae, 
  of 
  which 
  the 
  lower 
  is 
  the 
  coarser, 
  a 
  short 
  lamella 
  on 
  

   the 
  outer 
  lip, 
  a 
  coarse 
  basal 
  denticle, 
  and 
  a 
  coarse 
  oblique 
  

   lamella 
  on 
  the 
  columella. 
  

  

  Alt. 
  1*5, 
  diam. 
  maj. 
  1mm. 
  

  

  Hab. 
  Between 
  Rumruti 
  and 
  Mount 
  Kenia, 
  British 
  East 
  

   Africa. 
  

  

  Ennea 
  heniana, 
  sp. 
  n. 
  (Fig. 
  3.) 
  

  

  Shell 
  small, 
  ovately 
  cylindrical, 
  white, 
  somewhat 
  polished; 
  

   whorls 
  8, 
  the 
  first 
  five 
  rather 
  rapidly 
  increasing, 
  sculptured 
  

   with 
  obsolete, 
  oblique, 
  transverse 
  striae, 
  which 
  become 
  more 
  

   accentuated 
  on 
  the 
  last 
  whorl 
  behind 
  the 
  labrum, 
  the 
  last 
  

   whorl 
  tri-strangulate 
  ; 
  suture 
  impressed 
  ; 
  umbilical 
  area 
  exca- 
  

   vated, 
  depressed, 
  and 
  finally 
  narrowing 
  to 
  a 
  shallow 
  chink 
  ; 
  

   labrum 
  white, 
  continuous 
  ; 
  columella 
  descending 
  rather 
  

   obliquely 
  ; 
  aperture 
  irregularly 
  rectangular, 
  armed 
  with 
  an 
  

   almost 
  vertical 
  parietal 
  plait, 
  which 
  bifurcates 
  above 
  where 
  

   it 
  reaches 
  the 
  margin 
  of 
  the 
  peristome, 
  a 
  denticle 
  and 
  below 
  

   this 
  a 
  lamella 
  on 
  the 
  outer 
  lip, 
  a 
  rather 
  coarse 
  basal 
  erect 
  

   lamella 
  and 
  an 
  inwardly 
  curved 
  lamella 
  on 
  the 
  columella. 
  

  

  Alt. 
  3'5, 
  diam. 
  maj. 
  1"5 
  mm. 
  

  

  Aperture: 
  alt. 
  '75, 
  diam. 
  nearly 
  *5 
  mm. 
  

  

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

   British 
  East 
  Africa 
  ; 
  a 
  single 
  specimen 
  was 
  also 
  taken 
  in 
  the 
  

   lower 
  country 
  between 
  Rumruti 
  and 
  Mount 
  Kenia. 
  

  

  Ennea 
  optata, 
  sp. 
  n. 
  (Fig. 
  4.) 
  

  

  Shell 
  cylindrically 
  ovate, 
  moderately 
  solid, 
  whitish, 
  polished, 
  

   shining 
  ; 
  whorls 
  7£, 
  flat, 
  the 
  earlier 
  whorls 
  rather 
  rapidly 
  

   increasing, 
  the 
  later 
  very 
  slowly 
  increasing, 
  marked 
  with 
  

   transverse 
  arcuate 
  striaj, 
  which 
  become 
  finer 
  on 
  the 
  later 
  

   whorls, 
  and 
  very 
  fine 
  wavy 
  spiral 
  striaB, 
  the 
  last 
  whorl 
  bi- 
  

   strangulate 
  behind 
  the 
  labrum; 
  suture 
  linear; 
  umbilical 
  

   area 
  shallowly 
  excavated, 
  but 
  without 
  regular 
  perforation 
  ; 
  

   labrum 
  white, 
  thickened, 
  reflexed 
  ; 
  aperture 
  irregularly 
  sub- 
  

   quadrate, 
  armed 
  with 
  a 
  rather 
  crookedly 
  curved 
  parietal 
  

   lamella 
  on 
  the 
  right 
  side, 
  a 
  somewhat 
  coarse 
  lamella 
  situate 
  

   between 
  two 
  denticles 
  on 
  the 
  inner 
  margin 
  of 
  the 
  outer 
  lip, 
  a 
  

   basal 
  tooth-like 
  lamella 
  and 
  a 
  broad 
  bifurcate 
  lamella 
  on 
  the 
  

   columella. 
  

  

  