Female Nautilus without Shell

An illustration of a female nautilus without the shell. “c, points to the concave margin of the mantle-skirt leading into the sub-pallial chamber; g, the mid-foot or siphon; k, the superficial origin of its retractor muscles closely applied to the shell and serving to hold the animal in tis place; l, the sipjuncular pedicle of the visceral hump broken off short; v,v, the superior and inferior ophthalmic tentacles.” (Britannica, 1910)

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