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Typical modern crinoid

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Typical modern crinoid.jpg Typical Pennsylvanian crinoidal limestoneThumbnailsTypes of symmetry in a fossil coralTypical Pennsylvanian crinoidal limestoneThumbnailsTypes of symmetry in a fossil coralTypical Pennsylvanian crinoidal limestoneThumbnailsTypes of symmetry in a fossil coralTypical Pennsylvanian crinoidal limestoneThumbnailsTypes of symmetry in a fossil coralTypical Pennsylvanian crinoidal limestoneThumbnailsTypes of symmetry in a fossil coralTypical Pennsylvanian crinoidal limestoneThumbnailsTypes of symmetry in a fossil coralTypical Pennsylvanian crinoidal limestoneThumbnailsTypes of symmetry in a fossil coral