Elements of comparative zoology (1904) Elements of comparative zoology elementsofcompa00king Year: 1904 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 oesophagus 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.
Elements of comparative zoology (1904) Elements of comparative zoology elementsofcompa00king Year: 1904 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 oesophagus 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 marine.
Size: 1281px × 1562px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
