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"A genus of cephalapodous mollusca, pretty generally known by the name of Paper Nautilus, and in consequence of similarity in the form of the shell, often confounded with the genus Nautilus, but in fact much more nearly allied to the Poulpe (Octopus)." — Chambers' Encyclopedia, 1875

Argonaut

"A genus of cephalapodous mollusca, pretty generally known by the name of Paper Nautilus, and in consequence…