XVI 



OEDER AND SUCCESSION OF LIFE, 



ESPECIALLY AS REFERRED TO IN THE FOLLOWING SKETCHES. 



The subjoined tabulation exhibits proximately the stages at which the 

 great ascending sections of Plants and Animals make their first appear- 

 ance in the stratified systems : 



QUATERNARY. 



TERTIARY. 



CRETACEOUS. 



f Man. Plants and animals o 

 I existing species and distribu 

 I tion ; a few genera recently 

 (^ extinct. 



j Placental mammals. Plants 

 I and animals of existing or 

 \ ders ; a large proportion, 

 however, of extinct genera 

 ^ and species. 



(Marsupial mammals, birds, 

 reptiles, fishes, shell-fish, 

 Crustacea, zoophytes ; palms, 

 . coniferae, ferns, lycopods, 



OOLITIC. 

 TRIASSIC. 



f Marsupial mammals, birds, 

 reptiles, fishes, shell - fish, 

 ( Crustacea, zoophytes; palms, 

 j cycads, coniferac, ferns, ly- 

 ^ copods, sea-weeds. 



PERMIAN. f Reptiles, fishes, shell-fish, crus- 



< tacea, zoophytes; coniferse, 

 CARBONIFEROUS. ( f erns> lycopods, sea- weeds. 



OLD RED SAND- 

 STONE. 



SILURIAN. 

 j I CAMBRIAN. 



w ( 



LAURENTIAN. 



Fishes, shell- fish, Crustacea, 

 zoophytes; ferns, lycopods, 

 sea-weeds. 



( Shell-fish, Crustacea, worm- 

 t tracks, zoophytes; sea- weeds. 



( Crustacea, worm-burrows, and 

 ( zoophytes. 



( Traces of lowly or foramini- 

 ( feral organisms. 



