. Seaside Studium der Naturgeschichte. Meerestiere. 42 MAKINE TIERE VON MASSACHUSETTS BAT. Ende Tentakel Projekt (siehe Abb. 45), immer mehr zahlreiche, wie Schwein. 46, obwohl sie nie sechzehn an der Zahl nicht überschreiten. Da sie in der Höhe Einschnürungen statt in verschiedenen Entfernungen entlang seiner Länge, jede solche Verengung gelappt um ihre Marge, bis endlich sieht es aus wie ein Haufen von scalloped Untertassen oder Festplatten zusammen aufgereiht (siehe Abb. 47). Das oberste dieser Festplatten Kg. 48. fällt und stirbt; aber alle anderen zu trennen, indem Sie die Vertiefung der Verengungen, und schwimmen Sie so wenig

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. Seaside studies in natural history. Marine animals. 42 MAKINE ANIMALS OF MASSACHUSETTS BAT. end tentacles project (see Fig. 45), growing more numerous, as in Pig. 46, though they never exceed sixteen in number. As it increases in height constrictions take place at different distances along its length, every such constriction being lobed around its margin, till at last it looks like a pile of scalloped saucers or disks strung together (see Fig. 47). The topmost of these disks Kg. 48. falls off and dies; but all the others separate by the deepening of the constrictions, and swim off as little free disks (Fig. 48), which eventually grow into the enormous Jelly-fish described above. These three phases of growth, before the relation between them was under- stood, have been mistaken for distinct animals, and described as such under the names of Scyphistoma, Strobila, and Bphyra. A/urelia. (Aweliaflavidula PiR. et Les.) Another large Discophore, though by no means to be compared to the Cyanea in size, is our common Aurelia (Figs. 49, 60) Its bluish-white disk measures from twelve to fifteen inches in diameter, but its dimensions are not increased by the tentacles, which have no great power of contraction and expansion, and form a short fringe around its margin, widening and narrowing Pig_ 49_ slightly as the tentacles are stretched or drawn in. It is quite trans- parent, as may be seen in Fig 49, where all the fine ramifications of the chymiferous tubes, as well as the ovaries, are seen through the vault of the disk. Fig. 60 represents the upper surface, with the ovaries around the mouth, occupying the same position as those of the Cyanea, though they differ from the latter in their greater rigidity, and do not hang down in the form of Fig. 48. Bphyra of a Discophore j Aurellii flaridula. (^Agaaaiz.) Fig. 49. Aurelia aeen in profile, reduced. (Agassiz, ). Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada

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