There is no superfluous room taken up in the Naples aquarium for the fish that may be studied in aquariums elsewhere. Only the rarest, the strangest, the most curious creatures are here to be seen. But one room of the beautiful building devoted to the zoölogical station, which stands on that street of Naples running along the sea, is shown to the public. One walks into it from the level of the street, and the transition from the light outside to strange semi-darkness is as if one were to suddenly find himself walking upon the bottom of the sea. The light comes only from above, shining through water of many hundreds of cubic feet, on to what seems at first a garden of moving flowers behind tanks of clear glass, which seem, so complete is the illusion, not like glass at all, but water. The visitor walks along dark alleys lined on both sides with these brilliant tanks, and the beautiful sea animals are so close that it seems easy to touch them. It is like being in a narrow, dark theater with the stage all around and about, strangely illuminated, not by footlights, but by a radiance from above. There are about thirty tanks in all, and at the very first of these glass-walled vats we stopped entranced. Behind it were piles of rocks shining in the water, and from every crevice grew what seemed brilliant flowers, but of colors so soft and waxlike that they were almost more lovely than our flowers of earth. "Surely these deep red ones that cover the rocks to the left are a species of aster, and these are cacti, and these, yes, these reddish-brown one are chrysanthemums and nothing else." But even as we spoke we saw the petals of first one, then another, flower wave back and forth, and in and out, with curious curling movements, as none of our flowers do, even in the most various winds, and then from above a long pole was suddenly thrust down into the water, at the end of which was stuck a piece of raw red meat about as large as a walnut. It was the keeper come to feed his strange charges. Again and again were the bits of meat thrust down into the hearts of the sea flowers, and then we discovered with a kind of shock that these asters and cacti and chrysanthemums were not flowers at all, but flesh-eating animals, and that each waving petal was a mouth, by which the creature sucked in the blood of the meat. When all the juice had been extracted from the meat, the many mouths attached to each seeming flower, that had been tightly curled upon the raw flesh, now unfolded again into their petal-like positions in a circle, one over the other, and the meat, now but a tiny ball of dry pulp, slowly sank to the bottom of the tank. What the calyx was like, or whether it had any body at all, we could not see, so entirely hidden was it behind these many waving, armlike mouths.