﻿86 
  THEOBALD 
  : 
  GEOLOGY 
  OE 
  PEGU. 
  

  

  numerous 
  as 
  are 
  sometimes 
  met 
  with 
  in 
  the 
  coarser 
  sandstones 
  of 
  the 
  

   group. 
  

  

  The 
  following 
  genera 
  have 
  been 
  noted 
  in 
  the 
  Pegu 
  group, 
  but 
  they 
  

   usually 
  occur 
  in 
  particular 
  beds, 
  and 
  are 
  absent 
  from 
  great 
  thicknesses 
  

   of 
  strata, 
  where 
  they 
  might 
  be 
  looked 
  for. 
  Those 
  marked* 
  are 
  

   common 
  : 
  — 
  

  

  * 
  Area. 
  

  

  

  

  * 
  Tellina. 
  

  

  

  Toredo. 
  

  

  * 
  Pecten. 
  

  

  

  

  Pectunculus. 
  

  

  

  * 
  Cardium. 
  

  

  Cardita. 
  

  

  

  

  Venus. 
  

  

  

  Ostrea. 
  

  

  Placuna. 
  

  

  

  

  Corbula. 
  

  

  

  Pinna. 
  

  

  Cytherea. 
  

  

  

  

  Anatina. 
  

  

  

  * 
  Tbracia. 
  

  

  Murex. 
  

  

  

  

  * 
  Conus. 
  

  

  

  Mitra. 
  

  

  Concbolepas. 
  

  

  

  

  * 
  Natica. 
  

  

  

  Eostellaria. 
  

  

  Dentalium. 
  

  

  

  

  * 
  Trocbus. 
  

  

  

  * 
  Turritella. 
  

  

  Orbitolites. 
  

  

  2 
  

  

  sp. 
  

  

  Ancillaria. 
  

  

  

  Cyprsea. 
  

  

  Balanus. 
  

  

  

  

  

  

  Hemifusus. 
  

  

  (Corals) 
  * 
  Flabellum. 
  

  

  * 
  Turbinolia. 
  * 
  

  

  Cladocera 
  

  

  

  A 
  few 
  small 
  crabs 
  are 
  not 
  uncommon 
  in 
  some 
  beds, 
  but 
  are 
  as 
  yet 
  

   undetermined. 
  Echinoderms 
  are 
  scarce 
  and 
  not 
  well 
  preserved. 
  

  

  Above 
  this 
  Kama 
  shale 
  occurs, 
  a 
  very 
  thick 
  series 
  of 
  sandstones 
  and 
  

   shales, 
  which 
  do 
  not 
  present 
  any 
  bed 
  sufficiently 
  well 
  marked, 
  either 
  

   by 
  mineral 
  character 
  or 
  fossil 
  contents, 
  to 
  serve 
  as 
  a 
  serviceable 
  horizon 
  

   for 
  the 
  division 
  of 
  the 
  group 
  ; 
  neither 
  for 
  the 
  same 
  reason 
  can 
  isolated 
  

   sections 
  of 
  this 
  part 
  of 
  the 
  group 
  be 
  collated, 
  and 
  an 
  idea 
  gained 
  of 
  its 
  

   total 
  thickness. 
  These 
  uppermost 
  beds 
  of 
  the 
  group 
  pass, 
  as 
  already 
  

   stated, 
  into 
  beds 
  which, 
  from 
  containing 
  mammalian 
  bones, 
  I 
  have 
  in- 
  

   cluded 
  in 
  the 
  fossil-wood 
  group 
  ; 
  and 
  an 
  uninterrupted 
  process 
  of 
  deposi- 
  

   tion 
  seems 
  to 
  have 
  gone 
  on 
  under 
  similar 
  marine 
  conditions 
  through 
  

   the 
  whole 
  series, 
  save 
  only 
  perhaps 
  as 
  respects 
  the 
  highest 
  bed 
  of 
  the 
  

   fossil-wood 
  series, 
  beneath 
  which 
  if 
  anywhere, 
  and 
  here 
  but 
  very 
  doubt- 
  

   fully, 
  can 
  any 
  break 
  in 
  the 
  sequence 
  of 
  beds 
  be 
  looked 
  for. 
  

  

  ( 
  *74 
  ) 
  

  

  