﻿PKOCHEPINGS 
  OK 
  THK 
  M 
  A 
  LACOLOGICA 
  r, 
  SOCnCTT. 
  

  

  Natural 
  History 
  Museum 
  in 
  their 
  sliow-cases. 
  The 
  only 
  difference 
  

   between 
  their 
  grouping 
  and 
  Ball's 
  is 
  the 
  nominal 
  substitution 
  of 
  

   Tutufa, 
  Jouss., 
  for 
  the 
  sub-genus 
  he 
  calls 
  Bufonaria. 
  

  

  Notliing 
  is 
  commoner 
  than 
  for 
  opercula 
  to 
  be 
  misplaced, 
  turned 
  

   upside 
  down, 
  outside 
  in, 
  and 
  even 
  located 
  in 
  shells 
  they 
  do 
  not 
  belong 
  

   to. 
  Great 
  caution 
  is 
  needed 
  in 
  order 
  to 
  avoid 
  mistakes. 
  

  

  Species 
  whose 
  operculum 
  

   is 
  known. 
  

  

  Sub-genus 
  Bursa. 
  

   Sect. 
  Bursa. 
  

  

  albifasciata, 
  Sowb. 
  

   crumena, 
  Lam. 
  

   elegans, 
  Beck. 
  

   margaritula, 
  Desh. 
  

   nana, 
  Sowb. 
  

   rana, 
  L. 
  

  

  { 
  = 
  albifasciata, 
  Rve, 
  

   spinosa, 
  Lam. 
  

   thersites, 
  lledf. 
  

  

  Sect. 
  Marsxipina. 
  

  

  Sect. 
  Chasmotheca. 
  

  

  Sect. 
  Ranella. 
  

   bufonia, 
  Lara. 
  

   siphotiata, 
  Rve. 
  

   tuber 
  osissima, 
  live. 
  

  

  Sect. 
  Lampadopsis. 
  

   asperrima, 
  Dkr. 
  

   cruentata, 
  Sowb. 
  

   rhodostoma, 
  Desh. 
  

   thomce. 
  Orb. 
  

  

  Sect. 
  Cohibrellina. 
  

   ccelata, 
  Brod. 
  

   granularis, 
  Bolt. 
  

  

  var. 
  affinis, 
  Brod. 
  

  

  var. 
  livida, 
  live. 
  

  

  var. 
  ponderosa. 
  

   pustulosa, 
  Rve. 
  

   semigranosa, 
  Lam. 
  

  

  Sub-genus 
  Aspa. 
  

   Sect. 
  Aspa. 
  

  

  marginata, 
  Gmel. 
  

  

  Source 
  of 
  information. 
  i 
  

  

  Species 
  whose 
  operculum 
  

   is 
  not 
  known. 
  

  

  M.B. 
  cavitensis, 
  Beck 
  

  

  M.M., 
  J.R.T. 
  fijmisis, 
  AVats. 
  

  

  Ph.D.,J.R.T., 
  A.H.C. 
  neglecta, 
  Sowb. 
  

   J.R.T., 
  A.H.C. 
  nobilis, 
  Rve. 
  

  

  M.B. 
  

  

  ).McA., 
  A.H.C. 
  

   M.M.,J.C.M., 
  A.H.C. 
  

   J. 
  CM. 
  

  

  crassa, 
  Dillw. 
  

  

  foliata, 
  Brod. 
  

  

  grayana, 
  Dkr. 
  

   rugosa, 
  Sowb. 
  

   ve)i,ustula, 
  Rve. 
  

  

  papilla, 
  Wood. 
  

  

  M.B., 
  A.H.C. 
  

   J.C.M., 
  A.H.C. 
  

   A.H.C. 
  

  

  M.B. 
  

  

  Ph.D., 
  J.R.T. 
  

   Ph.D., 
  A.H.C. 
  

   M.B. 
  

  

  M.B., 
  A.H.C. 
  

   M.E., 
  M.M. 
  

   M.M., 
  J.R.T. 
  

   Ph.D., 
  M.M. 
  

   Ph.D. 
  

   M.B. 
  

   J.R.T. 
  

  

  M.B., 
  McA., 
  A.H.C. 
  

  

  caudisata, 
  Lam. 
  

   { 
  = 
  condita, 
  Dillw.). 
  

  

  ^ 
  In 
  this 
  hst, 
  M.B., 
  M.M. 
  mean 
  the 
  British 
  and 
  Manchester 
  Museums, 
  McA. 
  

   the 
  McAndrew 
  Collection 
  at 
  Cambridge, 
  J.C.M., 
  J.R.T., 
  Ph.D., 
  A.H.C. 
  

   mean 
  respectively 
  Dr. 
  J. 
  C. 
  Melvill's, 
  Mr. 
  TomUn's, 
  M. 
  Dautzenberg's, 
  

   and 
  my 
  own 
  collections. 
  

  

  