i> 
ee 
AM. “ee ia Vol. XVI, 1878. 
. Plate IV. 
v 
Padiat 
Ke 
== Post Tertiary. 
Pliocene. 
Tapir, ein geo —, 
— heri Myli 
uus Beds, 
sani Beds. 
Equ Elep. 
{ pean pet omens iakiiol. 
Protohippus, Aceratherium, Bos, 
Miocene. 
Eocene. 
aoe Cretaceous. 
—————————— 
—— — 
———ssso 
SSanTeeT 
————————— 
= Carboniferous. 
es. = 
- >, 
be ae Se 
a 
SSS 
MELE ET OOS 
————— Devonian. 
——— 
asa ee 
Miohippus Beds. 
Oreodon Beds. 
Brontotherium B 
Miohippus, Diceratherium, cinta 
{ Edentates (Moropus), Hywnod 
Eporeodon, Hyracodon, 
Mesohippus, Menodus, Elotherium 
Diplacodon Beds. 
Dinoceras Beds. 
(Green River B.) 
Lignite Series. 
Coryphodon Beds. 
Pteranodon Beds. 
Dakota Group. 
Epihippus, Amynodon 
{ Tinoceras, Tisdahieiniens Limnohyus, 
Orohippus, Helaletes, Colonoceras. 
Eohippus, Monkeys, Carnivores, Ungu- 
{ lates, Tillodonts, Rodents, Serpents. 
Hadrosaurus, Dryptosaurus, 
rds with Teeth ( Odontornithes), Hesper- 
eres Ichthyornis, Mosasaurs, 
Edestosaurus, Lestosau seh adestenn Uurus, 
Pterodactyls, Plesiosaurs. 
Atlantosaurus B. 
Dinosaurs, Apatosaurus, Gy sonatas? 
Nanosaurus. Turtles. Diplosauru 
Pte tyls. Dryolestes. 
Conn. River Beds, 
First Mammals (Marsupials), (Droma- 
therium). 
Dinosaur Footprints, Amphisaurus. 
Crocodiles ( belodon). 
Permian. 
Reptiles, Nothodon, Sphenacodon. 
Coal Measures. 
. 
First Reptiles (?) 
First known Amphibians (Labyrinth- — 
Silurian. 
PaLEvzoic, 
Subcarboniferous. pe 
Corniferous. 
Schoharie Grit. First known Fishes. * 
‘ 
Upper Silurian. 
Lower Silurian. a 
5 
= 
4 
Primordial. 3 
= 
2 
2 
Huronian. -& 
> 
° 
Zz 
Laurentian. 
SECTION oF THE Eartu’s Crust. 
TO ILLUSTRATE VERTEBRATE LIFE IN AMERICA. 
