. Comparative zoology, structural and systematic. For use in schools and colleges. Zoology. Fig. 191.—a MeQusa, seen in profile and from below, showing central polypite, ping their sides, like the opening and shutting of an um- brella, with great regularity. They are frequently phos- phorescent when disturbed. Some are quite small, resembling little glass bells; the common Aurelia is over a foot in diameter when full grown; while the Cyanea, the giant among Jelly-fishes, sometimes meas- ures five feet, with tentacles forty feet long. When dried, nothing is left but a film of membrane weigh- in
. Comparative zoology, structural and systematic. For use in schools and colleges. Zoology. Fig. 191.—a MeQusa, seen in profile and from below, showing central polypite, ping their sides, like the opening and shutting of an um- brella, with great regularity. They are frequently phos- phorescent when disturbed. Some are quite small, resembling little glass bells; the common Aurelia is over a foot in diameter when full grown; while the Cyanea, the giant among Jelly-fishes, sometimes meas- ures five feet, with tentacles forty feet long. When dried, nothing is left but a film of membrane weigh- ing only a few grains. There are two representative types: the Lucernaria, the Umbrella-acalepli, having a short pedicel on the back radiating and marginal for attachment; tcntaclcs disposcd in eight groups around the margin, the eight points alternating with the four partitions of the body-cavity and the four corners of the mouth; not less than eight radiating ca- nals, and no membra- nous v^eil. The common species on the Atlantic shore, generally found attached to eel-grass, is an inch in diameter, of a green color. Disco- jphora, the ordinary Jel- ly-fish, is free and oceanic. It differs from the Lucernaria in its usually larger size and solid disk, four radiating ca- nals, which ramify and open into a circular vessel, and a " veil," or shelf, always running around the mouth of the disk.'". Fio. \^1.—Liicernaria auricula attached to a piece of sea-weed; natural size. The one on the right is abnormal, having a ninth tuft of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Orton, James, 1830-1877. New York, Harper and brothers
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