﻿374 
  Hay 
  — 
  Ages 
  of 
  Pleistocene 
  Deposits. 
  

  

  Aphelops, 
  Procamelus, 
  and 
  Hipparion. 
  Hipparion 
  

   reaches 
  also 
  into 
  the 
  Aftonian 
  stage; 
  and 
  remains 
  of 
  a 
  

   camel 
  found 
  at 
  Ocala, 
  Forida, 
  have 
  been 
  identified 
  as 
  

   those 
  of 
  Procamelus. 
  It 
  mnst 
  certainly 
  be 
  admitted 
  that 
  

   the 
  other 
  genera 
  might 
  have 
  attained 
  the 
  Nebraskan. 
  

   Considering 
  the 
  strong, 
  peculiarly 
  Pleistocene 
  element 
  

   found 
  in 
  the 
  Alachuan 
  fauna, 
  the 
  writer 
  is 
  inclined 
  to 
  

   believe 
  that 
  the 
  beds 
  belong 
  to 
  the 
  earliest 
  Pleistocene 
  

   rather 
  than 
  to 
  the 
  Pliocene. 
  There 
  do 
  not 
  appear 
  to 
  be 
  

   in 
  the 
  collections 
  made 
  in 
  them 
  any 
  considerable 
  chances 
  

   for 
  admixture 
  of 
  fossils 
  of 
  different 
  ages. 
  Whether 
  or 
  

   not 
  Sellard's 
  Dunnellon 
  belongs 
  with 
  the 
  Alachua 
  clays 
  

   may 
  be 
  regarded 
  as 
  questionable. 
  

  

  In 
  southwestern 
  Idaho 
  there 
  is 
  a 
  deposit 
  which 
  has 
  

   been 
  called 
  by 
  Cope 
  the 
  Idaho 
  beds. 
  Merriam 
  has 
  dis- 
  

   cussed 
  the 
  age 
  of 
  these 
  clays 
  in 
  his 
  paper 
  cited 
  above 
  (p. 
  

   431). 
  They 
  have 
  been 
  regarded 
  as 
  belonging 
  to 
  the 
  

   Pliocene 
  or 
  even 
  the 
  Miocene. 
  From 
  these 
  beds 
  Cope 
  

   described 
  twenty-two 
  species 
  of 
  fresh-water 
  fishes. 
  Mer- 
  

   riam 
  presents 
  a 
  list 
  of 
  the 
  mammals 
  that 
  have 
  been 
  found 
  

   in 
  the 
  same 
  beds. 
  Among 
  them 
  are 
  species 
  of 
  Equus, 
  a 
  

   rhinoceros 
  belonging 
  either 
  to 
  Aphelops 
  or 
  to 
  Teleoceras, 
  

   and 
  a 
  species 
  of 
  Procamelus. 
  That 
  is, 
  here 
  is 
  a 
  fauna 
  

   quite 
  like 
  that 
  of 
  the 
  Alachua 
  clays. 
  Leidy's 
  Mastodon 
  

   mirificus 
  (Stegomastodon 
  mirificws) 
  occurs 
  there 
  like- 
  

   wise. 
  Merriam 
  regards 
  this 
  as 
  a 
  Pliocene 
  species, 
  but 
  it 
  

   has 
  been 
  found 
  in 
  the 
  Aftonian 
  of 
  Iowa; 
  and 
  Leidy's 
  

   type 
  quite 
  certainly 
  belonged 
  to 
  the 
  Pleistocene. 
  

  

  Dr. 
  W. 
  D. 
  Matthew 
  (Bull. 
  Amer. 
  Mus. 
  Nat. 
  Hist., 
  Vol. 
  

   XVI, 
  p. 
  321) 
  has 
  referred 
  to 
  a 
  small 
  collection 
  of 
  mam- 
  

   mals 
  which 
  had 
  been 
  made 
  somewhere 
  in 
  the 
  Oregon 
  

   desert. 
  The 
  deposits 
  had 
  been 
  considered 
  by 
  Cope 
  as 
  

   belonging 
  to 
  the 
  Pliocene, 
  doubtless 
  because 
  it 
  had 
  con- 
  

   tained 
  Hipparion, 
  Teleoceras, 
  and 
  camels 
  of 
  the 
  genus 
  

   Camelops, 
  or 
  possibly 
  of 
  Procamelus. 
  It 
  contained 
  like- 
  

   wise 
  bones 
  of 
  Elephas 
  and 
  Equws. 
  In 
  short, 
  we 
  have 
  here 
  

   the 
  same 
  unusual 
  assemblage 
  of 
  genera 
  that 
  are 
  met 
  with 
  

   in 
  Florida 
  and 
  in 
  Idaho. 
  Merriam 
  and 
  Buwalda 
  15 
  have 
  

   discussed 
  the 
  Eingold 
  formation, 
  found 
  along 
  the 
  Colum- 
  

   bia 
  river, 
  in 
  Franklin 
  county, 
  "Washington. 
  A 
  vertebrate 
  

   fauna, 
  not 
  determinable 
  specifically, 
  but 
  consisting 
  of 
  

   about 
  eight 
  forms, 
  was 
  found. 
  This 
  included 
  a 
  species 
  of 
  

  

  "Bull. 
  Dopt. 
  Geol. 
  Univ. 
  Calif., 
  vol. 
  10, 
  pp. 
  255-264. 
  

  

  f 
  

  

  