﻿Equus 
  Beds. 
  

   Phohippus 
  Beds. 
  

  

  Mioliippus 
  Beds. 
  

   Oreodon 
  Beds. 
  

   BrontotheriumBe 
  

  

  Heliobatis 
  Beds. 
  

   Coryphodon 
  Beds. 
  

  

  A( 
  kuiinsaiii 
  1.1':; 
  llc-il:-- 
  

   Baptanodon 
  Beds. 
  

   Hallopus 
  Beds. 
  

  

  Nothodon 
  Beds. 
  

  

  

  ^ 
  

  

  L±\S\\SS\V£ 
  

  

  Dinichthys 
  Beds. 
  

   Lower 
  Devonian. 
  

  

  Heliobatis, 
  Amia, 
  Lepiih 
  

  

  S 
  Ctii-iipliwlOH, 
  JCtihippi, 
  

   \ 
  Tillodonts, 
  Kodents, 
  S 
  

  

  Ceraiops, 
  Ti-ia-ral-npx, 
  Jinn 
  

   Mmninals, 
  Cimolomys, 
  

  

  lXuHIJIIIIJ.1, 
  Slil.JuilOn 
  . 
  Bll' 
  

  

  s 
  (Dromutherium) 
  . 
  

  

  Section 
  to 
  il 
  

  

  A.TE 
  VERTEBRATE 
  LlEE 
  IK 
  AMERICA 
  

  

  