| Fishes. |
| | |
|Erian or Devonian. |_Articulata_--Insects |Acrogens
| | and higher Crustaceans. |and
| |_Vertebrata_--Fishes, |Gymnosperms.
| | Ganoid and Placoid. |
| | |
|Carboniferous. |_Mollusca_--Pulmonata |Acrogens,
| | (Land Snails). |Gymnosperms,
| |_Articulata_--Myriapods, |Endogens?
| | Arachnidans (Gallyworms,|
| | Spiders and Scorpions). |
| |_Vertebrata_--Batrachians|
| | or Amphibians prevalent.|
| | |
|Permian. |_Vertebrata_--Lacertian |
| | or Lizard-like |
| | Reptiles. |
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III. |Triassic. |_Vertebrata_--Higher |
SECONDARY| | Reptiles prevalent; |
OR | | Marsupial Mammals. |
MESOZOIC | | |
PERIOD. |Jurassic. |_Vertebrata_--Great |Endogenous
| | prevalence of higher |trees.
| | Reptiles; Fishes, |
| | homocerque; Earliest |
| | Birds. |
| | |
|Cretaceous. |_Vertebrata_--Decadence |Angiospermous
| | of reign of Reptiles; |Exogens.
| | Ordinary Bony Fishes. |
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IV. |Eocene. |_Vertebrata_--Mammals |Exogens
TERTIARY | | prevalent, especially |prevalent.
OR | | Pachyderms; Cycloid |
CAINOZOIC| | and Ctenoid Fishes |
PERIOD. | | prevalent. |
| |First _living_ |Some Moder