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Fusulina cylindrica, a typical foraminiferal shell forming rocks in the later Paleozoic. A single shell enlarged and partly sectioned to show interior.

Fusulina Cylindrica

Fusulina cylindrica, a typical foraminiferal shell forming rocks in the later Paleozoic. A single shell…

A foraminiferal shell or the Miliola type. Note that each new chamber covers all preceding ones. Important limestone builder.

A Foraminiferal Shell

A foraminiferal shell or the Miliola type. Note that each new chamber covers all preceding ones. Important…