﻿Edwards 
  — 
  Bacillaria 
  of 
  the 
  Occidental 
  Sea. 
  449 
  

  

  White 
  Beds 
  near 
  First 
  Poixt 
  on 
  the 
  N, 
  Shore 
  of 
  Soda 
  

  

  Lake. 
  

   Melosira 
  crenulata 
  F. 
  T. 
  K, 
  

  

  Crystals 
  of 
  calcium 
  carbonate. 
  Pieces 
  of 
  hornblende. 
  

  

  Lake 
  Bed 
  in 
  exposure 
  near 
  Lewis 
  Symonds 
  Ranch, 
  Mono 
  

  

  Lake, 
  California. 
  

   JDenticula 
  thermalis 
  F. 
  T. 
  K. 
  Synedva 
  ulna 
  P. 
  A. 
  C. 
  N. 
  

  

  The 
  rest 
  is 
  sand. 
  

  

  Lower 
  Lake 
  Beds, 
  Rfsh 
  Creek 
  Section, 
  Mono 
  Lake, 
  

   California. 
  

   Cocconeis 
  placeyitula 
  C. 
  G. 
  E. 
  Navicula 
  borealis 
  C. 
  G. 
  E. 
  

   J^aviciila 
  cuspidata 
  F. 
  T. 
  K. 
  " 
  sphcerophora 
  F. 
  T. 
  K. 
  

  

  tbrma 
  oraliculare. 
  Surirella 
  ovata 
  F. 
  T. 
  K. 
  

  

  Also 
  two 
  which 
  contained 
  no 
  fossils 
  of 
  any 
  kind. 
  

  

  Upper 
  Lake, 
  Beds 
  S. 
  Shore 
  of 
  Mono 
  Lake, 
  California. 
  

   Lake 
  Bonneville, 
  Utah. 
  

  

  It 
  will 
  be 
  observed 
  that 
  crystals 
  of 
  calcium 
  carbonate 
  are 
  

   found 
  in 
  several 
  specimens. 
  These 
  have 
  been 
  deposited 
  when 
  

   the 
  water 
  which 
  formed 
  the 
  Occidental 
  Sea 
  evaporated, 
  and 
  

   sodium 
  carbonate 
  is 
  also 
  formed 
  later 
  thrown 
  down 
  as 
  in 
  the 
  

   soil 
  that 
  is 
  left 
  and 
  in 
  the 
  soda 
  springs 
  which 
  are 
  common 
  all 
  

   over 
  the 
  Great 
  Plain. 
  Sodium 
  chloride 
  and 
  sodium 
  biborate 
  

   (borax) 
  are 
  common 
  in 
  waters 
  of 
  the 
  Great 
  Salt 
  Lake, 
  Utah, 
  

   and 
  Borax 
  Lake, 
  California. 
  

  

  It 
  will 
  be 
  noticed 
  that 
  the 
  forms 
  of 
  the 
  bacillaria 
  are 
  not 
  the 
  

   same 
  in 
  the 
  specimen 
  as 
  in 
  another. 
  But 
  this 
  is 
  the 
  rule 
  of 
  

   their 
  distribution. 
  How 
  different 
  are 
  the 
  forms 
  in 
  one 
  spring 
  

   from 
  another 
  only 
  a 
  few 
  feet 
  apart 
  and 
  in 
  fact 
  in 
  one 
  specimen 
  

   taken 
  from 
  a 
  river 
  from 
  another 
  taken 
  nearby. 
  The 
  forms 
  can 
  

   never 
  be 
  the 
  same 
  everywhere 
  in 
  a 
  deposit. 
  That 
  is 
  local 
  

   distribution. 
  

  

  It 
  will 
  be 
  interesting 
  to 
  note 
  what 
  C. 
  King 
  says 
  of 
  the 
  Eocene 
  

   lake 
  in 
  the 
  United 
  States 
  Exploration 
  of 
  the 
  Fortieth 
  Parallel, 
  

   vol. 
  I, 
  1878. 
  He 
  says 
  on 
  page 
  360, 
  " 
  As 
  yet 
  the 
  great 
  Eocene 
  

   lake, 
  whose 
  main 
  deposits 
  are 
  circumscribed 
  by 
  the 
  boundaries 
  

   of 
  the 
  basin 
  of 
  the 
  Colorado 
  Riv^er, 
  is 
  the 
  only 
  one 
  of 
  any 
  con- 
  

   siderable 
  geographical 
  area 
  known 
  in 
  the 
  middle 
  Cordillera 
  

   region. 
  In 
  its 
  earlier 
  stages 
  this 
  lake 
  was 
  coextensive 
  with 
  the 
  

   rocks 
  of 
  the 
  Vermilion 
  Creek 
  Period, 
  the 
  lowest 
  division 
  of 
  the 
  

   American 
  lacustrine 
  Eocene." 
  It 
  will 
  be 
  seen 
  that 
  King 
  places 
  

   the 
  lake 
  in 
  the 
  lowest 
  Eocene 
  where 
  it 
  merges 
  into 
  the 
  Creta- 
  

   ceons, 
  and 
  that 
  he 
  does 
  not 
  make 
  the 
  lake 
  much 
  larger 
  than 
  

   the 
  Yermilion 
  Creek 
  Period, 
  but 
  this 
  was 
  only 
  on 
  the 
  Fortieth 
  

   Parallel. 
  He 
  does 
  not 
  take 
  into 
  consideration 
  Mono 
  Lake 
  in 
  

   California, 
  or 
  the 
  Staked 
  Plain 
  of 
  Texas. 
  These 
  I 
  do, 
  as 
  also 
  

   Cash 
  Lake 
  in 
  California 
  and 
  other 
  places. 
  Thus 
  I 
  extend 
  the 
  

  

  Am. 
  Jour. 
  Scl 
  — 
  Fourth 
  Series, 
  Vol. 
  YIII, 
  No. 
  48.— 
  December, 
  1899. 
  

   31 
  

  

  