﻿NUMMULITIC 
  OR 
  EOCENE 
  GROUP. 
  91 
  

  

  is 
  at 
  present 
  known 
  to 
  the 
  West 
  bank 
  of 
  the 
  river. 
  Towards 
  the 
  frontier 
  

   these 
  rocks 
  form 
  a 
  regular 
  belt 
  of 
  country 
  intervening- 
  between 
  the 
  

   Triassics 
  to 
  the 
  "West 
  and 
  the 
  newer 
  Tertiaries 
  to 
  the 
  East 
  ; 
  but 
  South 
  

   of 
  the 
  point 
  where 
  the 
  Triassics 
  disappear, 
  the 
  precise 
  extent 
  of 
  the 
  

   Nummulitic 
  group 
  to 
  the 
  West 
  is 
  uncertain, 
  from 
  its 
  joining, 
  if 
  not 
  

   blending 
  with, 
  the 
  altered 
  rocks 
  of 
  the 
  Southern 
  portion 
  of 
  the 
  Arakan 
  

   hills, 
  which 
  are 
  almost 
  devoid 
  of 
  organic 
  remains, 
  or 
  present 
  so 
  few 
  as 
  

   to 
  be 
  useless 
  for 
  any 
  purpose 
  of 
  sub-division 
  of 
  the 
  group, 
  or 
  even 
  for 
  

   estimating 
  its 
  geological 
  age. 
  

  

  For 
  these 
  altered 
  rocks 
  of 
  the 
  Southern 
  region, 
  I 
  have, 
  therefore 
  been 
  

   forced 
  to 
  accept 
  a 
  provisional 
  classification 
  and 
  name, 
  callino- 
  them 
  

   Negrais 
  beds, 
  from 
  their 
  being 
  very 
  characteristically 
  displayed 
  about 
  

   Cape 
  Negrais, 
  at 
  the 
  Southern 
  termination 
  of 
  the 
  Arakan 
  rano-e. 
  These 
  

   beds 
  probably 
  include, 
  could 
  we 
  only 
  establish 
  the 
  fact, 
  members 
  of 
  the 
  

   Eocene 
  group, 
  with 
  a 
  large 
  preponderance 
  of 
  beds 
  of 
  an 
  older 
  group 
  of 
  

   Cretaceous 
  age 
  — 
  the 
  southern 
  extension 
  of 
  beds 
  which, 
  in 
  the 
  Sando- 
  

   way 
  district, 
  we 
  can 
  declare 
  on 
  meagre, 
  but 
  unquestionable 
  fossil 
  evi- 
  

   dence 
  to 
  be 
  Cretaceous. 
  

  

  It 
  is, 
  however, 
  certainly 
  not 
  among 
  the 
  altered 
  rocks 
  of 
  the 
  Southern 
  

   portion 
  of 
  the 
  Arakan 
  range 
  (the 
  Negrais 
  beds 
  of 
  my 
  present 
  classi- 
  

   fication) 
  that 
  any 
  hopeful 
  attempt 
  can 
  be 
  made 
  to 
  separate 
  these 
  two 
  

   groups, 
  Eocene 
  and 
  Cretaceous, 
  from 
  one 
  another, 
  partly 
  from 
  the 
  altera- 
  

   tion 
  the 
  beds 
  have 
  been 
  subjected 
  to, 
  and 
  the 
  consequent 
  obliteration 
  

   therein 
  of 
  any 
  fossils 
  they 
  may 
  have 
  formerly 
  contained 
  (and 
  to 
  some 
  

   such 
  cause 
  it 
  seems 
  impossible 
  not 
  to 
  refer 
  the 
  general 
  unfossiliferous 
  

   character 
  of 
  the 
  limestones 
  within 
  this 
  area), 
  and 
  partly 
  to 
  the 
  wild 
  

   forest-clad 
  and 
  uninhabited 
  character 
  of 
  the 
  hills 
  which 
  quite 
  debars 
  

   one 
  from 
  effecting 
  anything 
  like 
  a 
  close 
  examination 
  of 
  them. 
  

  

  On 
  the 
  frontier 
  line, 
  going 
  West, 
  the 
  Nummulitic 
  group 
  is 
  first 
  

   met 
  with 
  at 
  sixteen 
  and 
  a 
  half 
  miles 
  from 
  the 
  river, 
  and 
  attains 
  a 
  

   breadth 
  of 
  seventeen 
  miles. 
  A 
  few 
  miles 
  to 
  the 
  South 
  of 
  this 
  point 
  the 
  

  

  ( 
  279 
  ) 
  

  

  