. Report of the Geological Survey of Ohio. Geology; Paleontology; Mines and mineral resources; Zoology; Paleobotany; Botany. 10 PALEONTOLOGY OF OHIO. as described and figured by Pander and Owen, consists of six pieces; the central rhomboidal plate (" ventro-median") being detached from the Ventbal Shield op Dikichxhts Tebbelu, K. One-tentli natural size. triangular plate which forms the middle of the anterior margin (" pre- ventro-median "). In Dinichthys, these two bones, having almost exactly the same form, are united by a narrow bony band. It is almost certain also that
. Report of the Geological Survey of Ohio. Geology; Paleontology; Mines and mineral resources; Zoology; Paleobotany; Botany. 10 PALEONTOLOGY OF OHIO. as described and figured by Pander and Owen, consists of six pieces; the central rhomboidal plate (" ventro-median") being detached from the Ventbal Shield op Dikichxhts Tebbelu, K. One-tentli natural size. triangular plate which forms the middle of the anterior margin (" pre- ventro-median "). In Dinichthys, these two bones, having almost exactly the same form, are united by a narrow bony band. It is almost certain also that they were connected in Coccosteus, though it is possible that the isthmus that united them was cartilaginous. The union of these bones is plainly seen in Pander's figures ( Tleber die Placodermen des DevonisoJien Systsms. Taf. 5, Fig. 1, No. 13.) The anterior pair of lateral plates {pre-ventro-laterals of Owen) are relatively longer and narrower in Dinichthys than in Coccosteus, and their anterior angles are more prominent; but these differences are of trifling import. The anterior margin of these plates, as well as that of the pre- veniro-median is strongly reflexed. This character is indicated by a double line, and is common to the plastrons of both the genera under consideration. The posterior lateral plates {post-ventro-laterals of Owen) are broader. 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 Geological Survey of Ohio. Columbus, Nevins & Myers, state printers
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