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The COELENTERATA. The Tabulate Corals have existed from the Silurian epoch to the present day, but I am not aware that the ancient 'Heliolites' possesses a single mark of a more embryonic or less differentiated character, or less high organization, than the existing 'Heliopora'. As for the Aporose Corals, in what respect is the Silurian 'Paleocyclus' less highly organized or more embryonic than the modern 'Fungia', or the Liassic Aporosa than the existing members of the same families?

As for the Aporose Corals, in what respect is the Silurian Paloeocyclus less highly organised or more embryonic than the modern Fungia, or the Liassic Aporosa than the existing members of the same families?

As for the Aporose Corals, in what respect is the Silurian Paloeocydus less highly organized or more embryonic than the modern Fungia, or the Liassic Aporosa than the existing members of the same families? The Mollusca.

The COELENTERATA. The Tabulate Corals have existed from the Silurian epoch to the present day, but I am not aware that the ancient 'Heliolites' possesses a single mark of a more embryonic or less differentiated character, or less high organization, than the existing 'Heliopora'. As for the Aporose Corals, in what respect is the Silurian 'Paleocyclus' less highly organized or more embryonic than the modern 'Fungia', or the Liassic Aporosa than the existing members of the same families?