. Breviora. 1969 PROBELESODON LEWISI 15 anteriorly, the inner surface is grooved for a narrow meckelian canal which extends from a point just behind the symphysis back to a point where it is covered by the prearticular. Below, and partially covering this meckelian groove, is a thin and narrow splenial, which takes a minor part in the symphysis and extends backward to a point on the posterior margin of the dentary above its angular process. Of other elements of the "normal" reptilian internal surface of the jaw, there is, in the material, little positive evidence of the coronoid, whic
. Breviora. 1969 PROBELESODON LEWISI 15 anteriorly, the inner surface is grooved for a narrow meckelian canal which extends from a point just behind the symphysis back to a point where it is covered by the prearticular. Below, and partially covering this meckelian groove, is a thin and narrow splenial, which takes a minor part in the symphysis and extends backward to a point on the posterior margin of the dentary above its angular process. Of other elements of the "normal" reptilian internal surface of the jaw, there is, in the material, little positive evidence of the coronoid, which was presumably present in life as a thin flake of bone on the inner surface of the dentary in the region of the base. Fig. 6. Lateral view of the lower jaw of Probelesodon 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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