. Seaside studies in natural history. Marine animals. 56 MARINE ANBIALS OF MASSACHUSETTS BAT. Eucope, wliich darts tlirougli the water at full speed, hardly stop- ping to rest for a moment. If the Oceania be disturbed it flattens its disk, and folds itself up somewhat in the shape of a bale (see Fig. 69), remaining perfectly still, with the tentacles stretching in every direction. When the cause of alarm is removed, it Jig. 69. gently expands again, re- suming its natural outline and indolent attitudes. The number of these animals is amazing. At certain sea- sons, when the weather is favorable
. Seaside studies in natural history. Marine animals. 56 MARINE ANBIALS OF MASSACHUSETTS BAT. Eucope, wliich darts tlirougli the water at full speed, hardly stop- ping to rest for a moment. If the Oceania be disturbed it flattens its disk, and folds itself up somewhat in the shape of a bale (see Fig. 69), remaining perfectly still, with the tentacles stretching in every direction. When the cause of alarm is removed, it Jig. 69. gently expands again, re- suming its natural outline and indolent attitudes. The number of these animals is amazing. At certain sea- sons, when the weather is favorable, the surface of the sea may be covered with them, for several miles, so thickly that their disks touch each other. Thus they remain packed together in a dense mass, allowing themselves to be gently drifted along by the tide till the sun loses its intensity, when they retire to deeper waters. Some points, not yet observed, are still wanting to com- plete the history of this Jelly-fish. By comparing such facts, however, as are already collected respecting it, with our fuller knowledge of the same process of growth in the Eucope, Tima, and Melicertum, we may form a tolerably correct idea of its de- velopment. It is hatched from a Olytia. {Clytia bicophora Ag.) In Figs. 70 - 73 we have the Acalephian and Hydroid stages of the Clytia (Fig. 73), another very pretty little Jelly-fish, closely allied to the Oceania. When first hatched, like the Oceania, it is very convex, almost thimble-shaped (see Fig. 70), but a little later the disk flattens and becomes more open, as in Fig. 71. In Fig. 72, we have a branch of the Hydroid, a Campanularia, greatly magnified, with tlie annulated reproductive calycle at^ tached to it, and crowded with Jelly-fishes ready to make their escape as soon as the calycle bursts. The adult Clytia (Fig. 73) is somewhat smaller and more active than the Oceania, and Fig. Attitude assumed by Oceania when Please note that these images are
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