﻿Hay 
  — 
  Ages 
  of 
  Pleistocene 
  Deposits. 
  375 
  

  

  Megalonyx, 
  an 
  equid 
  (Equus 
  or 
  Pliohippus) 
  , 
  one 
  or 
  two 
  

   camelids 
  (Pliauchenia?) 
  , 
  a 
  deer, 
  a 
  leporid, 
  a 
  Testudo, 
  and 
  

   fish 
  remains. 
  While 
  these 
  authors 
  were 
  inclined 
  to 
  place 
  

   the 
  Ringold 
  in 
  the 
  Pleistocene, 
  they 
  had 
  doubts 
  on 
  the 
  

   subject. 
  It 
  has 
  been 
  supposed 
  that 
  at 
  the 
  Oregon, 
  the 
  

   Idaho, 
  and 
  the 
  Florida 
  localities, 
  there 
  has 
  occurred 
  a 
  

   mingling 
  of 
  remains 
  belonging, 
  some 
  to 
  the 
  Pleistocene, 
  

   others 
  to 
  the 
  Tertiary; 
  but 
  the 
  occurrence 
  of 
  this 
  com- 
  

   bination 
  through 
  accidental 
  admixture 
  in 
  so 
  many 
  differ- 
  

   ent 
  places 
  is 
  improbable. 
  To 
  the 
  writer 
  the 
  most 
  prob- 
  

   able 
  explanation 
  is 
  that 
  the 
  three 
  deposits 
  belong 
  to 
  the 
  

   first 
  stage, 
  the 
  Nebraskan, 
  of 
  the 
  Pleistocene. 
  

  

  TJ. 
  S. 
  National 
  Museum, 
  

   Washington, 
  D. 
  C. 
  

  

  Am. 
  Jour. 
  Sci.— 
  Fourth 
  Series, 
  Vol. 
  XLVH, 
  No. 
  281.— 
  May, 
  1919. 
  

   26 
  

  

  