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The polypiaria were in such abundance as to form whole strata of themselves. The crinoidea and echinites were also extremely numerous. Shell mollusks, in hundreds of new species, occupied the bottoms of the seas of those ages, while of the swimming shell-fish, ammonites and belemnites, there were also many scores of varieties. The belemnite here calls for some particular notice.
We found five small kinds of sea-leeches; and among three kinds of star-fish, the Asterias Echinites, the large radii of which easily inflict a severe wound; another had the form of the Asterias Luna, was eight inches in diameter, without radii, and had more the appearance of a round loaf of bread somewhat flattened.
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