﻿17 
  

  

  NOTE 
  ON 
  A 
  WHITE 
  SPECIMEN 
  OF 
  ENA 
  MONTANA 
  (DKAP.). 
  

  

  Ey 
  H. 
  OVEKTON. 
  

  

  Read 
  14th 
  December, 
  1917. 
  

   Whilst 
  spending 
  a 
  few 
  davs 
  at 
  Painswick, 
  Gloucestershire, 
  early 
  in 
  

   September, 
  1914, 
  I 
  found 
  a 
  tine 
  specimen 
  of 
  Mia 
  montana 
  f. 
  albina, 
  

   Moquin-Tandon, 
  on 
  the 
  trunk 
  of 
  a 
  beech-tree 
  in 
  a 
  wood 
  neai" 
  

   Sheepscombe 
  ; 
  further 
  repeated 
  research 
  failed 
  to 
  reveal 
  a 
  second 
  

   example. 
  The 
  specimen 
  in 
  question 
  is 
  fully 
  grown, 
  with 
  the 
  

   periostracum 
  in 
  excellent 
  condition 
  and 
  not 
  worn 
  as 
  in 
  tlie 
  case 
  of 
  the 
  

   majority 
  of 
  the 
  type-specimens, 
  which 
  were 
  very 
  plentiful, 
  in 
  company 
  

   with 
  Clausilia 
  Jaminata 
  (Montagu) 
  and 
  its 
  form 
  albina, 
  jMoq.-Tandon, 
  

   many 
  of 
  which 
  were 
  decollated, 
  Clausilia 
  hidentata 
  (Strom), 
  and 
  

   Mia 
  ohscura, 
  Miiller. 
  

  

  The 
  specimens 
  of 
  Hygromia 
  drioJata 
  (Pfr.) 
  collected 
  in 
  the 
  same 
  

   wood, 
  with 
  the 
  exception 
  of 
  the 
  immature 
  examples, 
  all 
  appeared 
  to 
  

   have 
  the 
  periostracum 
  very 
  much 
  worn, 
  a 
  characteristic 
  which 
  I 
  have 
  

   also 
  noticed 
  in 
  Ditcham 
  Wood, 
  Hants. 
  One 
  would 
  naturally 
  expect 
  

   that 
  in 
  a 
  wood 
  where 
  the 
  shells 
  have 
  protection 
  against 
  the 
  elements 
  

   the 
  periostracum 
  would 
  be 
  more 
  perfect. 
  

  

  DESCKIPTION 
  OF 
  TWO 
  NEW 
  SPECIES 
  OF 
  LAND 
  MOLLUSCA. 
  

   J3y 
  G. 
  K. 
  Gdde, 
  F.Z.S. 
  

   B,eaA 
  11th 
  Jamiary, 
  1918. 
  

   Two 
  apparently 
  undescribed 
  forms 
  of 
  land 
  mollusca 
  were 
  placed 
  in 
  

   my 
  hands 
  for 
  identification 
  by 
  Mr. 
  H. 
  C. 
  Fulton. 
  The 
  one 
  from 
  

   Assam 
  is 
  represented 
  by 
  only 
  four 
  specimens, 
  while 
  of 
  the 
  Tonkin 
  

   form 
  several 
  have 
  been 
  received. 
  

  

  Khasiella 
  fultoni, 
  n.sp. 
  

  

  Shell 
  perforate, 
  depressedly 
  conoid, 
  subangulate 
  at 
  the 
  periphery, 
  

   pale 
  corneous, 
  radiately 
  and 
  closely 
  costulate 
  above, 
  the 
  costulse 
  

   gradually 
  disappearing 
  below 
  the 
  periphery, 
  smooth 
  and 
  shining 
  

   below 
  with 
  traces 
  of 
  spiral 
  sculpture; 
  spire 
  low, 
  apex 
  subacute, 
  

   whorls 
  8, 
  closely 
  wound, 
  slightly 
  convex 
  above, 
  the 
  last 
  subangulate 
  

   at 
  the 
  periphery, 
  not 
  descending, 
  swollen 
  below; 
  aperture 
  slightly 
  

   oblique, 
  subovate 
  ; 
  peristome 
  obtuse, 
  slightly 
  thickened 
  ; 
  basal 
  

   margin 
  arcuate, 
  outer 
  obtusely 
  angled, 
  columellar 
  obliquely 
  ascending; 
  

   umbilicus 
  perforate. 
  

  

  Diam. 
  maj. 
  18"5, 
  min. 
  17 
  mm.; 
  alt. 
  9 
  mm. 
  

  

  Sah. 
  — 
  Assam. 
  

  

  Type 
  in 
  British 
  Museum. 
  

  

  Intermediate 
  between 
  K. 
  vidua, 
  Blanf.,' 
  and 
  A', 
  climaderica, 
  Bens.^ 
  

   From 
  the 
  former 
  it 
  differs 
  in 
  having 
  a 
  lower 
  spire, 
  by 
  its 
  larger 
  

   diameter, 
  and 
  closer 
  and 
  more 
  regular 
  costul^e, 
  while 
  from 
  the 
  latter 
  

   it 
  may 
  be 
  separated 
  by 
  its 
  convex 
  whorls, 
  wider 
  aperture, 
  and 
  smallei" 
  

   protoconch; 
  the 
  costulae 
  are 
  also 
  less 
  pronounced 
  below 
  the 
  periphery. 
  

   From 
  both 
  it 
  differs 
  in 
  its 
  perforated 
  umbilicus. 
  It 
  is 
  also 
  related 
  

  

  ^ 
  Hanley 
  &Theobald, 
  Conch. 
  Ind., 
  1875, 
  p. 
  52, 
  pi. 
  exxx, 
  figs. 
  2, 
  3. 
  

   ^ 
  Benson, 
  Journ. 
  Asiat. 
  Soc. 
  Bengal, 
  vol. 
  v, 
  1836, 
  p. 
  352. 
  

  

  VOL. 
  XIU. 
  — 
  AUGUST, 
  1918. 
  2 
  

  

  