﻿152 
  PROCKKDINGS 
  OF 
  TUK 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  Pisidia. 
  — 
  Pisidmm 
  \iUjehorgii, 
  Cless,, 
  from 
  Orkney, 
  was 
  the 
  only 
  

   known 
  species 
  from 
  the 
  three 
  comital 
  divisions, 
  so 
  that 
  tlie 
  new 
  

   records 
  are 
  a 
  considerahle 
  extension 
  of 
  our 
  knowledge. 
  We 
  are 
  

   greatly 
  indebted 
  to 
  Mr. 
  B. 
  B. 
  Woodward 
  for 
  his 
  kindly 
  determination 
  

   of 
  the 
  species 
  of 
  this 
  genus. 
  

  

  DESCEIPTION 
  OF 
  AMPULLABIA 
  MERMODI, 
  N.SP. 
  

  

  By 
  G. 
  B. 
  SoAVERBY, 
  F.L.S. 
  

  

  Read 
  9th 
  May, 
  1919. 
  

  

  In 
  the 
  Proceedings 
  of 
  this 
  Society 
  (vol. 
  viii, 
  p. 
  345; 
  ix, 
  p. 
  56; 
  and 
  

   xii, 
  p. 
  65) 
  I 
  gave 
  a 
  synopsis 
  of 
  the 
  family 
  Anipullariida), 
  terminated 
  

   with 
  an 
  index 
  that 
  formed 
  a 
  list 
  of 
  the 
  350 
  names 
  that 
  have 
  been 
  

   given 
  to 
  supposed 
  species. 
  Of 
  these 
  only 
  190 
  were 
  actual 
  species; 
  

   the 
  remainder 
  were 
  placed, 
  either 
  as 
  mere 
  synonyms, 
  or 
  as 
  varietal 
  

   names. 
  

  

  In 
  order 
  to 
  complete 
  my 
  catalogue, 
  as 
  far 
  as 
  possible, 
  I 
  am 
  

   constrained 
  to 
  add 
  a 
  species 
  of 
  which 
  photographs 
  have 
  been 
  kindly 
  

   sent 
  me 
  by 
  Monsieur 
  Mermod, 
  of 
  the 
  Geneva 
  Natural 
  History 
  

   Museum. 
  Believing 
  it 
  to 
  be 
  a 
  species 
  hitherto 
  undescribed, 
  I 
  propose 
  

   to 
  name 
  it 
  in 
  his 
  honour. 
  

  

  Ampullaria 
  meemodi, 
  n.sp. 
  

   Testa 
  ovata, 
  solidiuscula, 
  vix 
  umbilicata 
  ; 
  spira 
  breviter 
  conica 
  ; 
  

   anfractus 
  3| 
  convex! 
  rotundati, 
  sutura 
  anguste 
  canaliculata 
  sejuncti; 
  

   anfractus 
  ultimus 
  convexus, 
  longitudinaliter 
  irregulariter 
  tenuiter 
  

  

  