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Exceedingly beautiful in the tropic seas are those small physali, a species of Acaleph�, known to sailors as "Portuguese110 men-of-war."

The name was first applied to the Jelly-fish tribe, but later was made to include the true Medus� or jelly-fishes, and others.—Other forms are Acaleph and Acalephan.

The color of this pretty Acaleph varies from a greenish hue to green, with a faint tinge of red, or to a reddish brown.

While Polyps live for many years, and Star-fishes and Sea-urchins require ten or fifteen years to attain their full size, the short existence of the Acaleph, with all its changes, is accomplished in one year.

But if they are linked together as a connected series, then the lowest Acaleph should stand next in structure above the highest Polyp, and the lowest Echinoderm next above the highest Acaleph.