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Updated: May 24, 2025
Then on the foraminifera, which secretes a shell of lime from the water. Then on a step higher to the polycystina, which secretes a shell, or skeleton of flint-like material from the water. Then come the sponges. Then the coral-animals, anemones and jelly-fish. Then come the sea-lilies, star-fish, etc. Then the various families of worms. Then the crabs, spiders, centipedes, insects.
Among the Reports of the United States Exploring Expedition, two important works from the pen of Professor Dana made their appearance; one on "Zoophytes," which treats at length on "Corals and Coral-Animals," and the other on "Coral-Reefs and Islands."
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