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"Development of Aurelia. Above to the left, young scyphistoma with four perradial tentacles. Below to left, scyphistoma with sixteen tentacles and first constriction. To the right, strobila condition of the scyphistoma, consisting of thirteen metameric segments; the uppermost still possesses the sixteen tentacles of the scyphistoma; the remainder have no tentacles, but are ephyrae, each with eight bifid arms. each segment when detached becomes an ephyra." — Encyclopedia Britannica, 1893

Aurelia

"Development of Aurelia. Above to the left, young scyphistoma with four perradial tentacles. Below to…

"Surface view of the sub-umbrella or oral aspect of Aurelia aurita, to show the position of the openings of the sub-genital pits, GP. In the center is the mouth, with four perradial arms corresponding to its angles. The four sub-genital pits are seen to be interradial. x indicates the outline of the roof of a sub-genital pit; y, the outline of its floor or oral limit, in which is the opening." — Encyclopedia Britannica, 1893

Aurelia Aurita

"Surface view of the sub-umbrella or oral aspect of Aurelia aurita, to show the position of the openings…