﻿MAI-I 
  GROUP. 
  123 
  

  

  ladder 
  is 
  required 
  to 
  enter 
  it. 
  There 
  is 
  nothing 
  in 
  the 
  composition 
  of 
  

   the 
  rock 
  to 
  explain 
  the 
  origin 
  of 
  the 
  cavity, 
  and 
  I 
  am 
  inclined 
  to 
  con- 
  

   sider 
  it 
  due 
  to 
  marine 
  action, 
  and 
  to 
  have 
  been 
  enlarged 
  from 
  some 
  

   original 
  small 
  fissure 
  or 
  hollow 
  in 
  the 
  rock 
  by 
  means 
  of 
  waves 
  and 
  tidal 
  

   action, 
  when 
  the 
  face 
  of 
  the 
  cave 
  stood 
  not 
  far 
  from 
  low 
  water 
  mark.* 
  

  

  X. 
  — 
  Mai-i 
  (Cretaceous) 
  Group. 
  

  

  No 
  rocks 
  of 
  Cretaceous 
  age 
  can 
  be 
  proved, 
  as 
  far 
  as 
  our 
  present 
  

   knowledge 
  goes, 
  to 
  occur 
  within 
  the 
  limits 
  of 
  Pegu, 
  though, 
  as 
  I 
  have 
  

   remarked, 
  it 
  is 
  by 
  no 
  means 
  improbable 
  that 
  some 
  of 
  the 
  beds 
  included 
  

   in 
  the 
  Negrais 
  group 
  may 
  be 
  of 
  this 
  age 
  ; 
  but 
  the 
  occurrence 
  of 
  beds 
  

   of 
  this 
  age 
  in 
  the 
  adjoining 
  district 
  of 
  Sandoway 
  is 
  too 
  important 
  to 
  be 
  

   passed 
  over 
  without 
  reference. 
  The 
  occurrence 
  of 
  rocks 
  of 
  Cretaceous 
  

   age 
  on 
  the 
  eastern 
  side 
  of 
  the 
  Bay 
  of 
  Bengal 
  was 
  first 
  established 
  in 
  

   1872, 
  by 
  the 
  discovery 
  near 
  Mai-i, 
  in 
  the 
  northern 
  part 
  of 
  the 
  Sandoway 
  

   district, 
  of 
  a 
  single 
  specimen 
  of 
  Ammonites 
  inflates 
  Sow. 
  The 
  specimen 
  

   was 
  found 
  in 
  the 
  bed 
  of 
  a 
  small 
  stream, 
  and 
  had 
  evidently 
  weathered 
  out 
  

   of 
  the 
  shales 
  in 
  which 
  the 
  bed 
  of 
  the 
  stream 
  lay, 
  but 
  curiously 
  enough, 
  it 
  

   was 
  unaccompanied 
  by 
  any 
  other 
  fossil 
  whatever, 
  though 
  I 
  devoted 
  a 
  

   day 
  to 
  the 
  careful 
  examination 
  of 
  the 
  spot. 
  The 
  specimen 
  was 
  not 
  

   perfect, 
  but 
  of 
  its 
  identity 
  with 
  the 
  Cenomanien 
  A. 
  inflatus 
  Sow, 
  Dr. 
  

   Stoliczka, 
  to 
  whom 
  I 
  submitted 
  the 
  specimen, 
  had 
  not 
  the 
  slightest 
  doubt. 
  

   The 
  Sandoway 
  district, 
  which 
  stretches 
  from 
  Mai-i 
  to 
  Gwah, 
  a 
  distance 
  

   of 
  one 
  hundred 
  and 
  twenty-four 
  miles, 
  belongs 
  to 
  the 
  province 
  of 
  

   Arakan, 
  and 
  on 
  this 
  account 
  no 
  less 
  than 
  from 
  the 
  wild, 
  uninhabited^ 
  

   and 
  inaccessible 
  character 
  of 
  the 
  greater 
  portion 
  of 
  it, 
  has 
  received 
  only 
  

   a 
  very 
  cursory 
  examination, 
  sufficient 
  to 
  give 
  a 
  general 
  idea 
  of 
  its 
  

   geological 
  structure 
  and 
  relation 
  to 
  the 
  adjoining 
  districts 
  of 
  Pegu. 
  

  

  * 
  This 
  cave 
  is 
  tenanted 
  by 
  great 
  numbers 
  of 
  a 
  Rhinolopbine 
  bat 
  which 
  Dr. 
  Dobson 
  

   identifies 
  as 
  Phyllorhina 
  larvata, 
  Horsfield, 
  of 
  a 
  dark 
  slaty 
  hue, 
  as 
  in 
  the 
  Khasi 
  Hill 
  race. 
  

  

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