. Elements of comparative zoology. Zoology. 170 SYSTEMATIC ZOOLOGY. tions of the mesenterial filaments can be more readily absorbed. Further details of structure are better given. FIG. 17.—Model of a Scyphozoan, part of the wall cut away to show the internal structures. At the top is the oral disc with three tentacles. The o?sophagus extends, in the centre, into the digestive cavity, the cavity being subdivided by radial septa. In the cut edges of the walls and septa the ectoderm is left white, the entoderm is divided into blocks. in treating of the two subclasses into which the Scyphozoa are
. Elements of comparative zoology. Zoology. 170 SYSTEMATIC ZOOLOGY. tions of the mesenterial filaments can be more readily absorbed. Further details of structure are better given. FIG. 17.—Model of a Scyphozoan, part of the wall cut away to show the internal structures. At the top is the oral disc with three tentacles. The o?sophagus extends, in the centre, into the digestive cavity, the cavity being subdivided by radial septa. In the cut edges of the walls and septa the ectoderm is left white, the entoderm is divided into blocks. in treating of the two subclasses into which the Scyphozoa are divided, merely saying here that all are 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 Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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