﻿NEWTON 
  : 
  GEOLOGICAL 
  ZONES 
  AND 
  THEIR 
  MOLLUSCA. 
  305 
  

  

  It 
  is 
  among 
  the 
  Mesozoic 
  rocks 
  that 
  zonal 
  work 
  has 
  been 
  so 
  largely 
  

   and 
  successfully 
  accomplished 
  ; 
  and 
  speaking 
  of 
  quite 
  modern 
  years 
  

   there 
  is 
  no 
  doubt 
  that 
  the 
  investigations 
  of 
  Mr. 
  S. 
  S. 
  Buckman 
  on 
  the 
  

   Jurassics 
  and 
  of 
  Dr. 
  Rowe 
  on 
  the 
  Upper 
  Cretaceous 
  have 
  done 
  much 
  

   to 
  direct 
  attention 
  to 
  the 
  great 
  value 
  of 
  this 
  form 
  of 
  research, 
  besides 
  

   inspiring 
  the 
  collector 
  with 
  a 
  greater 
  zeal 
  for 
  his 
  field-work. 
  Since 
  

   the 
  publication 
  of 
  Dr. 
  E,owe's 
  first 
  memoir 
  on 
  the 
  Coastal 
  Upper 
  Chalk 
  

   of 
  this 
  country 
  in 
  1900, 
  a 
  number 
  of 
  observers 
  have 
  shown 
  their 
  

   interest 
  in 
  certain 
  local 
  developments 
  of 
  the 
  Chalk 
  and 
  their 
  zones, 
  

   and 
  the 
  issue 
  of 
  many 
  important 
  papers 
  has 
  been 
  the 
  direct 
  result 
  ; 
  

   although 
  such 
  works 
  are 
  not 
  referred 
  to 
  on 
  this 
  occasion 
  they 
  are 
  of 
  

   great 
  value 
  as 
  forming 
  part 
  of 
  the 
  history 
  of 
  zonal 
  geology. 
  

  

  