8 
Oolite : 24. Lower Oolite [Inferior Oolite or Bajocien, and Great 
Oolite or Bathonien) ; 24, Middle Oolite [Oxford Clay or Callovien 
and Oxfordien ; Coral Rag or Corallien ; 25,Upper Oolite [Kimmer- 
idge Clay or Kimmeridgien and Purbeck and Portland Beds or Port- 
landien ]. 
First appearance of Acrodont Saurians (Lizards with teeth sol¬ 
dered to the jaws] and, in Europe, of Free [stemless] Crinoids*. 
Reign of Pterodactyls ; Ganoids ; Placoids ; Macroural 
[lobster-like] Decapods ; Free Crinoids; Zoophytes. 
Period of PhascolotJierium and Thylacotherium [Marsupials] ; and 
Of ICHTHYOSAURIANS. 
26. Wealdesi INeocomien]. 
First appearance of web-footed Birds [Natatoiies] culmination of 
the type of Reptiles. 
Reign of Deinosaurians, yiz : Megalosaurus [40 feet in length] Ig- 
uanodon [60 feet], Pelorosaurus (80 feet), and Ilylmosaurus ; and of 
Crocodilians. 
VIII. CKETA€E6U§ AGE. 
First appearance of Angiosperms [more than 100 species] and 
Palms ; Brachyural (crab-like) Decapods ; Cycloids [soft-finned] 
and Ctenoid (spinny-finned) Fishes ; true Crocodiles *; Grallatores; 
Whales. Decline of Cephalopods ; Icthyosaurs ; Plesiosaurs; 
Deinosaurs. 
Reign of Ammonites ; Reptiles ; Rudistes ; Bryozoa ; Echi- 
noids ; Foraminifera ; Squalodonts (sharks with sharp teeth); 
Oysters. 
Earlier Cretaceotas : 27, Dacota Gr.; 28, Benton Gr. ; 29, Nio¬ 
brara Gr. 
Period of Liriodendron *, Quercus*, Cornus *, Fagus *, Populus*, Sa- 
lix *, Alnus*, Sassafras *, Liquidambar*, Taxodium *, (Angiospermous 
trees); Oysters; Asterioids ; Ammonitidae. 
Eater Cretaceoit§ : 30, Pierre Gr. ; 31, Fox Hills Gr. 
Period of Ammonitidae; Belemnitidae; Oysters; Nautilus*, Tere- 
brgtulina; Mosasaurus (a marine, carnivorous, acrodont lizard); Cro- 
codilus * ; Lamna *, Otodus, Oxyrhina , (Squalodonts) ; Ptychodus 
(Cestraciont) ; Priscodelphinus (Cetacean) ; Rhizopods; few corals. 
[In Europe the Cretaceous is divided into GREEN SAND : con¬ 
sisting of Lower Green Sand ( Aptien ); Gault (Albien) ; Upper 
Green Sand ( Cenomanien) and WHITE CHALK: consisting of 
Lower White Chalk ( Turonien ); Upper White Chalk ( Senonien ); 
M^estricht ( JDanien ). The Green Sand Stage seems to be wanting 
in America.] 
hi. cenozoic time 
Dawn and culmination of the present order of nature. 
Reign of Mammals. 
IX. TERTIARY A€!E. 
First appearance of Serpfnts and of nearly all the orders of 
Mammals and Birds. 
Reign of Mammals ; Sharks. 
Introduction of Reptiles and Fishes approaching to exist¬ 
ing forms. The Deinosaurs, Pterosaurs, Enaliosaurs, Am- 
