﻿148 
  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOCIETY. 
  

  

  Arioti 
  ater 
  (Linn.), 
  S.R., 
  St., 
  H., 
  F., 
  C, 
  Sw., 
  M. 
  

  

  — 
  intermedius, 
  Norm., 
  S.ll., 
  St., 
  H., 
  F., 
  M. 
  

  

  — 
  circumscriptus, 
  John., 
  S.R., 
  St. 
  

  

  Pyramidula 
  rotundata 
  (Miill.), 
  S.E.., 
  St., 
  M., 
  Holra. 
  

  

  Arianta 
  arhustorum 
  (Linn.), 
  S.E.., 
  F. 
  

  

  Helix 
  hortensis, 
  Miill., 
  F., 
  M., 
  Holm. 
  

  

  Cochlicopa 
  luhrica 
  (Miill.), 
  S.R., 
  St., 
  F., 
  M., 
  Holm, 
  Honton, 
  

  

  St. 
  Mary's. 
  

   Pupilla 
  muscorum 
  (Linn.), 
  M., 
  Holm. 
  

   Lamia 
  cylindracea 
  (Da 
  C), 
  S.R., 
  St., 
  F., 
  B., 
  M., 
  Honton, 
  

  

  St. 
  Mary's. 
  

  

  — 
  anglica 
  (Fer.), 
  S.R., 
  M., 
  Holm. 
  

   Balea 
  perversa 
  (Linn.), 
  M., 
  Holm. 
  

  

  Succinea 
  pfeifferi^ 
  Rossm., 
  S.R., 
  M., 
  Holm, 
  Honton. 
  

   Ancylasjlicviatilis 
  (Miill.), 
  H., 
  M., 
  Greenigo. 
  

   Limncea 
  pereger 
  (Miill.), 
  S.R., 
  St., 
  H., 
  M. 
  

  

  — 
  truncattda 
  (Miill.), 
  S.ll., 
  St., 
  F., 
  M., 
  Holm, 
  Honton. 
  

   Planorhis 
  Icevis, 
  Aid., 
  M., 
  Loch 
  Harray. 
  

  

  — 
  crista 
  (Linn.), 
  B., 
  M., 
  L. 
  Harray, 
  L. 
  Grsemeshall. 
  

   Theodoxus 
  Jliiviatilis 
  (Linn.), 
  M., 
  L. 
  Harray. 
  

  

  Pisidium 
  casertanum 
  (Poli), 
  S.R., 
  H., 
  F., 
  M., 
  L. 
  Grsemeshall. 
  

  

  — 
  nitidutn, 
  Jenyns, 
  M., 
  L. 
  Grseraeshall. 
  

  

  — 
  persotiattwi, 
  Malm, 
  S.R., 
  St., 
  H., 
  F., 
  M., 
  Honton, 
  L. 
  

   Graemeshall. 
  

  

  — 
  pimlhim, 
  Jenyns, 
  M., 
  L. 
  Harray. 
  

  

  — 
  militim. 
  Held, 
  S.R., 
  M., 
  L. 
  Harray. 
  

  

  — 
  subtruncafum, 
  Malm, 
  S.R., 
  H., 
  M., 
  L. 
  Graemeshall. 
  

  

  — 
  lilljehorgii, 
  Cless., 
  M., 
  L. 
  Kirbister, 
  L. 
  Graemeshall. 
  

   Spharium 
  corneum 
  (Linn.), 
  M., 
  L. 
  Kirbister. 
  

  

  S.R. 
  =: 
  South 
  Ronaldshay, 
  St. 
  = 
  Stroma, 
  B. 
  = 
  Burray, 
  H. 
  = 
  Hoy, 
  

   F. 
  = 
  Flotta, 
  C. 
  = 
  Cava, 
  Sw. 
  = 
  Switha, 
  M. 
  = 
  Mainland, 
  where 
  we 
  

   have 
  given 
  the 
  exact 
  localities 
  in 
  many 
  cases. 
  

  

  Shetland. 
  

  

  In 
  Shetland 
  the 
  area 
  examined 
  was 
  more 
  restricted 
  than 
  in 
  Orkney. 
  

   Collections 
  were 
  made 
  in 
  the 
  neighbourliood 
  of 
  Olna 
  Firth, 
  Busta 
  

   Voe, 
  Solium 
  Voe, 
  and 
  Voe, 
  all 
  in 
  the 
  parish 
  of 
  Delting 
  on 
  Mainland, 
  

   whilst 
  a 
  single 
  visit 
  to 
  Lei'wick 
  provided 
  a 
  few 
  species. 
  

  

  In 
  Shetland 
  there 
  is 
  much 
  less 
  cultivated 
  land 
  than 
  in 
  Orkney, 
  and 
  

   it 
  consists 
  nsually 
  of 
  small 
  walled-in 
  patches. 
  Lochs 
  and 
  streams 
  

   abound, 
  but 
  the 
  former 
  with 
  tlieir 
  stony 
  bottoms 
  do 
  not 
  as 
  a 
  rule 
  

   suit 
  Pisidia, 
  wliilst 
  the 
  latter 
  are 
  so 
  rapid 
  and 
  turbulent 
  that 
  Limnaese 
  

   are 
  not 
  usually 
  to 
  be 
  found 
  in 
  them. 
  Both 
  these 
  genera 
  are 
  probably 
  

   present 
  in 
  parts 
  of 
  most 
  of 
  the 
  lochs, 
  but 
  time 
  did 
  not 
  allow 
  of 
  much 
  

   investigation. 
  In 
  the 
  many 
  little 
  ponds, 
  pools, 
  and 
  small 
  ditches, 
  and 
  

   even 
  in 
  the 
  smallest 
  trickles 
  of 
  water, 
  Pisidia 
  often 
  abound 
  and 
  

   occasionally 
  Limncea 
  pereger 
  was 
  present. 
  Given 
  a 
  muddy 
  bottom, 
  

   Pisidia 
  seem 
  able 
  to 
  maintain 
  themselves 
  anywhere. 
  The 
  species 
  

   obtained 
  were 
  : 
  — 
  

  

  