. Seaside studies in natural history. Marine animals. Fig. 12. fim>\ Kg. Fig. 11. Fig. 13. Arachnactis bracliiolata A. Ag., greatly magnified, Younfr Arachoactig seen so as to show the mouth. Among the nomadic Polyps is a small floating Actinia, called Arachnactis, (Pig. 11,) from its resemblance to a spider. They are found in great plenty floating about during the night, feeling their way in every direction by means of their tentacles, which are large in proportion to the size of the animal, few in number, and turned downward when in their natural attitude. The partitions and the dige
. Seaside studies in natural history. Marine animals. Fig. 12. fim>\ Kg. Fig. 11. Fig. 13. Arachnactis bracliiolata A. Ag., greatly magnified, Younfr Arachoactig seen so as to show the mouth. Among the nomadic Polyps is a small floating Actinia, called Arachnactis, (Pig. 11,) from its resemblance to a spider. They are found in great plenty floating about during the night, feeling their way in every direction by means of their tentacles, which are large in proportion to the size of the animal, few in number, and turned downward when in their natural attitude. The partitions and the digestive cavity en- closed between them are short, as will be seen in Fig. 11, when compared to the general cavity of the body floating balloon-like above them. Around the mouth is a second row of shorter ten- tacles, better seen in a younger speci- men (Fig. 12). This Actinia differs from those described above, in having two of the sides flattened, instead of being perfectly circular. Looked at from above (as in Pig. 13) this differ- ence in the diameters is very percepti- ble ; there is an evident tendency to- wards establishing a longitudinal axis. In the sea-anemone, this disposition is only hinted at in the slightly pointed folds or projections on opposite sides of the circle formed by the mouth, which in the Arachnactis are so elongated as to produce a somewhat narrow slit (see Fig. 12. Young 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 Agassiz, Elizabeth Cabot Cary, 1822-1907; Agassiz, Alexander, 1835-1910, joint author. Boston, J. R. Osgood and Company
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