A Monograph of the Trilobites of North America: with Coloured Models of the Species — Cryptolithus Tessellatus. Green. Cast No. 28, and Fig. 4.

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A Monograph of the Trilobites of North America: with Coloured Models of the Species Cryptolithus Tessellatus. Green. Cast No. 28, and Fig. 4. · ch 44/57

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