‘OF REPTILES PRECEDED THE AGE  OURING THIS AGE THE REPTILES APPEARED, 
0} ‘ama AND IS REPRESENTED IN FLOURISHED GREATLY. AND DECLINED AT 
OUS PARTS OF THE WORLD BY MARINE, | ITS CLOSE TO THEIR PRESENT IMPORTANCE — 
AND FREBH-WATER DEPOSITS | THE MAMMALS APPEAREO WELL DOWN IN 
INTO sey GREAT PERIODS, | THIS AGE BUT REMAINED SMALL AND 
iC, JURASSIC AND CRETACEOUS. | SCARCE UNTIL ITS END. 
MAMMALS IN LARGE NUMBERS 
.| TRUE LIZARDS and SPRENODONS 
TURTLES 
NUMEROUS BONY FISHES [TELEOSTS) 
CARNIVOROUS DINOSAURS 
HERBIVOROUS DINOSAURS 
LAST PLESIOSAURS 
FIRST SOFT-SHELLEO TURTLES 
MODERN TAILED AMPHIBIANS (SALAMAMDERS) 
BIRDS, PROBABLY TOOTHED 
HED ino TOOTHLESS PTEROOACTYLS 
|OINOSAURS 
BONY FISHES (reveosrs) SHARKS 
TRUE LIZARDS an DOUCHOSAURS 
HERBIVOROUS DINOSAURS )cciancoo 
$ CARNIVOROUS DINOSAURS (mecarosau 
2 eas | PTERODACTYLS, TOOTHED and TOOTHLESS 
COMANCHE MOSASAURS 
; ; ICHTHYDSAURS and PLESIOSAURS 
WEALD EN CROCODILES. TURTLES. 
POTOMAC SHARKS and GANOID FISHES 
CHIMAROID FISHES 
its 
& 
5 
iQ 
iN 
PRIMITIVE MAMMALS (MARSUPIALS, IN 
aa0 MULTITUBERCULATES) 
CARNIVOROUS DINOSAURS (CERATOSAURUS) 
HERBIVOROUS DINDSAURS (ATLANTUSAURUS)| 
PT 
4 iS 
| CHTHYOSAURS (TOOTHED and TOOTHLESS) 
PLESIOSAURS. PTEROOACTYLS/TOOTHED) 
SMALL PRIMITIVE MAMMALS — 
LONG NOSED ees ITHLEDSAURS} 
ISAURS and PLESIOSAUR: 
ICHTHYD: 
FIRST HERBIVEROUS DINOSAURS 
TURTLES. PTERGDACTYLS 
SHARKS and CHONOROSTEAN FISHES 
REPTILE MAMMALS (DROMATHERLUM, 
TRITYLOOON, MICROLESTES) 
Nie OEE FIRST CARNIVOROUS DINOSAURS 
and CONN. and NEW JERSEY| [LAST LABYRINTHODONTS 
RINTHODONTS| 
FIRST PLESIOSAURS|NOTHOSAURS) 
FIRST REPTILES|COTYLOSAURS, 
| PROGANDSAURS and PELYCOSAURS) 
SHARKS. LUNG FISHES. 
CHONDROSTCAN ont COOSSOFTERYGMN FISHES 
PRIMITIVE AMPHIBIANS (STEGO- 
CEPHALIA, mostur omar: SPLoES) 
PRIMITIVE SHARKS ané LUNG FISHES 
SMONDEDSTEAN isd CROSSOPTERYSAN FISHES 
| AGE OF AMPHIBIANS 
DIVISIONS OF THE AGE OF REPTILES 
Characteristic fossil reptiles, amphibians and fishes, and the formations in which they are found 
30 
