﻿240 
  PROCKKDINGS 
  OF 
  THK 
  MALACOLOGICAL 
  SOCIKTY. 
  

  

  NOTE 
  ON 
  THE 
  ANIMAL 
  OF 
  THE 
  GENUS 
  CLEOPATRA. 
  

  

  By 
  E. 
  A. 
  Smith, 
  I.S.O. 
  

  

  Bead 
  11th 
  November, 
  1910. 
  

  

  The 
  animal 
  of 
  this 
  genus 
  does 
  not 
  appear 
  to 
  have 
  been 
  observed, 
  

   although 
  the 
  radula 
  of 
  C. 
  hulimoides 
  is 
  described 
  by 
  Troschel. 
  

   Mr. 
  H. 
  B. 
  Preston 
  kindly 
  gave 
  me 
  specimens 
  of 
  C. 
  ferruginea, 
  Lea, 
  

   and 
  C. 
  cingulata, 
  Martens, 
  which 
  he 
  had 
  received 
  from 
  Shinibi 
  Hills, 
  

   British 
  East 
  Africa. 
  These, 
  on 
  being 
  placed 
  in 
  tepid 
  water, 
  revived 
  

   after 
  a 
  period 
  of 
  some 
  months 
  in 
  a 
  dry 
  condition. 
  They 
  appear 
  to 
  be 
  

   very 
  sluggish 
  in 
  their 
  movements, 
  but 
  this 
  may 
  possibly 
  be 
  due 
  to 
  the 
  

   unnatural 
  conditions 
  under 
  which 
  they 
  now 
  exist. 
  The 
  animals 
  of 
  

   both 
  species 
  are 
  very 
  much 
  alike, 
  and 
  in 
  general 
  features 
  resemble 
  that 
  

   of 
  the 
  genus 
  Bithynia. 
  

  

  The 
  proboscis 
  in 
  C. 
  ferruginea 
  is 
  rather 
  large, 
  flattish, 
  extensile 
  and 
  

   contractile, 
  rather 
  blunt 
  at 
  the 
  end, 
  and 
  cleft 
  longitudinally, 
  streaked 
  

   across 
  with 
  fine 
  black 
  lines. 
  The 
  tentacles, 
  7-8 
  mm. 
  in 
  length, 
  are 
  

   very 
  slender, 
  and 
  acutely 
  pointed, 
  transparent, 
  but 
  speckled 
  with 
  black. 
  

   JTo 
  neck-lappets, 
  such 
  as 
  occur 
  in 
  Vivipara. 
  The 
  eyes 
  are 
  minute, 
  

   slightly 
  prominent, 
  and 
  situated 
  on 
  the 
  outer 
  side 
  of 
  the 
  tentacles 
  

   towards 
  the 
  base. 
  Foot 
  small, 
  broad, 
  widely 
  curved 
  in 
  front, 
  somewhat 
  

   auriculate 
  anteriorly 
  at 
  the 
  sides, 
  narrower 
  and 
  rounded 
  behind. 
  

   Above 
  of 
  a 
  semi 
  - 
  transparent 
  smoky 
  appearance, 
  mottled 
  with 
  

   yellowish 
  specks, 
  uniformly 
  pale 
  beneath. 
  

  

  On 
  removing 
  the 
  animal 
  from 
  its 
  shell 
  the 
  mantle 
  is 
  seen 
  to 
  be 
  of 
  

   a 
  bright-green 
  tint, 
  excepting 
  the 
  margin, 
  which 
  is 
  yellowish. 
  The 
  

   liver 
  also 
  is 
  of 
  a 
  similar 
  verdigris-green 
  colour. 
  

  

  In 
  C. 
  cingulata 
  the 
  foot 
  is 
  a 
  little 
  more 
  pointed 
  behind, 
  and 
  rather 
  

   more 
  distinctly 
  streaked 
  with 
  excessively 
  fine 
  black 
  lines. 
  There 
  are 
  

   yellowish 
  mottlings 
  between 
  the 
  streaks, 
  and 
  towards 
  the 
  margin 
  it 
  is 
  

   pale 
  and 
  unstreaked. 
  

  

  As 
  only 
  two 
  or 
  three 
  specimens 
  have 
  been 
  observed 
  it 
  cannot 
  be 
  

   said 
  whether 
  these 
  slight 
  differences 
  are 
  constant 
  or 
  not. 
  

  

  On 
  comparison 
  with 
  a 
  figure 
  of 
  Bithynia 
  tentaculata 
  given 
  by 
  

   Moquin-Tandon, 
  the 
  foot 
  is 
  seen 
  to 
  be 
  rather 
  shorter 
  and 
  more 
  

   pointedly 
  auriculate 
  in 
  front, 
  and 
  the 
  tentacles 
  are 
  more 
  acutely 
  

   tapering. 
  

  

  