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A monograph of the British fossil Crustacea Pl. VII . Pal Soc DEVONIAN CRUSTACEA SUB ORDER EURYPTERIDA iding dfilct uil Day StJn lLiinlljed lJth PTERYGOTUS ANCLICUS Agasstx Figs fortions of Chelate Antenna Figs ons of Palpi Figs Tortious of Smmmina Feci Pl VII Illustration biodiversitylibrary org title Woodward Henry