﻿PEGU 
  GROUP. 
  87 
  

  

  There 
  are 
  some 
  slight 
  means, 
  however, 
  of 
  judging 
  of 
  the 
  position 
  

   of 
  some 
  of 
  the 
  highest 
  beds 
  of 
  the 
  present 
  group, 
  as, 
  for 
  instance, 
  the 
  

   occurrence 
  of 
  a 
  species 
  of 
  Turritella, 
  hardly 
  distinguishable 
  from 
  one 
  now 
  

   living 
  on 
  the 
  coast, 
  which 
  seems, 
  where 
  it 
  occurs 
  plentifully, 
  to 
  mark 
  a 
  

   high 
  position 
  in 
  this 
  group 
  ; 
  and 
  the 
  same 
  may 
  be 
  said 
  of 
  a 
  species 
  of 
  

   coral 
  (Flabellum) 
  which 
  first 
  appears 
  in 
  the 
  Cytlierea 
  Promensis 
  bed 
  at 
  

   Prome, 
  but 
  seems 
  to 
  range 
  as 
  high 
  as 
  the 
  above-mentioned 
  Turritella. 
  

   Characteristic 
  of 
  this 
  Turritella 
  horizon 
  and 
  the 
  passage 
  beds 
  into 
  the 
  

   fossil- 
  wood 
  group 
  is 
  another 
  coral 
  (Cladocera) 
  , 
  very 
  commonly 
  seen 
  in 
  

   hard 
  sandstone, 
  and 
  the 
  commonest 
  and 
  best 
  marked 
  fossil 
  in 
  them, 
  

   although 
  by 
  no 
  means 
  an 
  abundant 
  species 
  anywhere. 
  

  

  Except 
  in 
  the 
  Kama 
  shale, 
  foraminifera 
  are 
  scarce 
  throughout 
  the 
  

   beds 
  of 
  this 
  group. 
  A 
  single 
  specimen 
  of 
  an 
  Orbitolite 
  was 
  found 
  in 
  the 
  

   Cytlierea 
  Promensis 
  bed, 
  opposite 
  Prome, 
  which, 
  when 
  perfect, 
  might 
  

   have 
  been 
  the 
  size 
  of 
  a 
  shilling, 
  but 
  with 
  a 
  thickness 
  no 
  greater 
  than 
  

   cardboard. 
  A 
  careful 
  search, 
  however, 
  failed 
  to 
  discover 
  a 
  second 
  specimen. 
  

   Another 
  species 
  of 
  Orbitolite 
  forms 
  the 
  characteristic 
  fossil 
  in 
  a 
  hardish 
  

   sandstone 
  on 
  the 
  bank 
  of 
  the 
  Irrawadi, 
  a 
  little 
  above 
  the 
  lime-hill 
  ; 
  but 
  

   unfortunately 
  the 
  position 
  of 
  the 
  bed 
  is 
  not 
  very 
  clear, 
  neither 
  does 
  

   the 
  fossil 
  occur 
  anywhere 
  else 
  that 
  I 
  know 
  of. 
  A 
  perfect 
  specimen 
  must 
  

   have 
  measured 
  five 
  or 
  six 
  inches 
  across, 
  with 
  a 
  thickness 
  of 
  not 
  more 
  

   than 
  the 
  tenth 
  of 
  an 
  inch, 
  and 
  these 
  organisms 
  are, 
  in 
  parts 
  of 
  the 
  rock, 
  

   packed 
  together 
  so 
  closely 
  that 
  the 
  section 
  of 
  them 
  on 
  the 
  surface 
  

   suggests 
  the 
  idea 
  of 
  a 
  cross-cut 
  through 
  a 
  bundle 
  of 
  little 
  pancakes. 
  

  

  Echinoderms 
  are 
  of 
  extreme 
  rarity 
  throughout 
  this 
  group, 
  save 
  in 
  a 
  

   bed 
  which 
  I 
  shall 
  presently 
  describe, 
  whose 
  position 
  is 
  quite 
  problematical. 
  

   The 
  occurrence, 
  however, 
  of 
  a 
  species 
  of 
  Pseudo-diadema 
  is 
  remarkable 
  

   from 
  the 
  Cretaceous 
  affinities 
  which, 
  in 
  the 
  opinion 
  of 
  Dr. 
  Stoliczka, 
  it 
  

   would 
  seem 
  to 
  indicate 
  — 
  a 
  view 
  supported 
  by 
  the 
  very 
  Cretaceous 
  aspect 
  

   of 
  many 
  of 
  the 
  squaline 
  teeth 
  so 
  abundantly 
  found 
  in 
  many 
  beds 
  of 
  

   the 
  group. 
  These 
  fossils 
  {Pseudo-diadema) 
  are 
  met 
  with 
  at 
  a 
  few 
  spots 
  

  

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  275 
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