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Proc. Yorksh. Geol. & Polyt. Soc. Vol. XII.P1.1.

G.M.Woodward del et lith.

HYBODUS BASANUS.

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Proc. Yorksh. Geol. & Polyt. Soc., Vol. XII., PI. III.

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12.

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VINE: PALEOZOIC CTENOSTOMATOUS POLYZOA.

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