. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. white: osteology of seymouria baylorensis broili 335 notch. The supratemporal forms the anterior half of the process at the (Fig. 3) posterior side of the otic notch. It excludes the tabular from contact with the tympanic membrane. Squamosal. The squamosal shows considerable departure from the usual condition in the early tetrapods in that it forms a little more than half of the superior border of the otic notch. Normally in the Palaeozoic Amphibia the otic notch is not deep and the squamosal extends only to the anter
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. white: osteology of seymouria baylorensis broili 335 notch. The supratemporal forms the anterior half of the process at the (Fig. 3) posterior side of the otic notch. It excludes the tabular from contact with the tympanic membrane. Squamosal. The squamosal shows considerable departure from the usual condition in the early tetrapods in that it forms a little more than half of the superior border of the otic notch. Normally in the Palaeozoic Amphibia the otic notch is not deep and the squamosal extends only to the anterior angle. Trcmatops is an exception to this rule, since the squamosal extends a short distance along the superior. Ec^t/ Fig. 6. View of posterior half of skull with postorbital region removed, x 1. border from the anterior angle of the otic notch. Since the relation- ships of the intertemporal and supratemporal to the squamosal have not changed appreciably, it seems probable that the squamosal has been incised by the otic notch. The very deep otic notch seems to indicate that Seymouria possessed a very large tympanic membrane. Ventrally the squamosal overlaps the quadratojugal broadly on the outside. Anteriorly it unites with the jugal and postorbital in an interdigitating suture. Dorsally it underlaps the intertemporal and supratemporal. The portion of the process under the supratemporal extends for- ward, downward, and backward, and is united with the quadrate ramus of the pterygoid in a broad overlapping suture (Fig. 6). An isolated squamosal^ (Fig. 2, A, B, and C) No. 1090, shows the extent of the sutural contact. Posteriorly the squamosal overlaps the ascending ramus of the quadrate. The vertical extent of this contact is about 15 mm. This is proportionally a greater contact that is found in most. 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 ma
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
