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Updated: May 5, 2025
And it is remarkable that the tortoises, the snakes, and, the more modern forms of crocodile and lizard, and the amphibia and higher insects, are all cainozoic some of them were preceded by more or less transitory representatives, e.g., the Carboniferous Eosaurus and Permian Protosaurus the ancient Labyrinthodons and Urodelas, Chelonians and the amphicaelian crocodiles.
But throughout all, we see the rise, culmination, and decay of many transitory and apparently preparatory groups such as, for example, the Labyrinthodons and Urodelas preceding the modern types of Amphibia; ancient fish-forms preceding modern ones, and either dying out or leaving but a few and distant representatives; or again, the whole tribes of ancient Saurians, of which something has already been said.
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