. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MORPHOLOGY OF THE MADREPORARIA. 39 of the mesenteries and septa. It is the manner of appearance of the septa beyond the primary six which separates the Rugosa from modern hexameral corals, a separation of the same signifi- cance as that by which zoologists distinguish cyclic hexameral actinians from zoanthid polyps. The presence of the smaller axial septum in the cardinal O-. FIG. 12. Arrangement of the septa in a young corallite of Streplelasina profundttni (Owen). At this early stage the septa are arranged in a manner very
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MORPHOLOGY OF THE MADREPORARIA. 39 of the mesenteries and septa. It is the manner of appearance of the septa beyond the primary six which separates the Rugosa from modern hexameral corals, a separation of the same signifi- cance as that by which zoologists distinguish cyclic hexameral actinians from zoanthid polyps. The presence of the smaller axial septum in the cardinal O-. FIG. 12. Arrangement of the septa in a young corallite of Streplelasina profundttni (Owen). At this early stage the septa are arranged in a manner very similar to those in the mature corallite of Hadi-opkyUitm (cf. Fig. I), while in the fully de- veloped corallite they are nearly radial. The septa show a slight inequality in number on each side, a condition also usually met with in recent zoanthid polyps. fossula of the Rugosa serves to confirm in a peculiarly direct manner the relationship of the group to the living Zoantheoe. As is well known, one of the characteristics of the zoanthid polyp is the occurrence of a single gonidial groove, sulcus, or siphono-. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
Size: 1584px × 1578px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
