A Monograph of the Trilobites of North America: with Coloured Models of the Species — Ceraurus Pleurexanthemus. Green. Cast No. 33. Fig. 10.

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A Monograph of the Trilobites of North America: with Coloured Models of the Species Ceraurus Pleurexanthemus. Green. Cast No. 33. Fig. 10. · ch 50/57

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