. Carnegie Institution of Washington publication. THE UPPER TRIASSIC OF WESTERN TEXAS. 59 face of the skull the relation of the transverse to the pterygoid is very different in the two forms. In M. planirostris and pleimngeri the transverse lies external to the process of the pterygoid and articulates with it laterally instead of underlying it; the outer corner of the dependent process is formed entirely by the transverse; the palatine foramen is small, but lies anterior to the middle of the transverse; the quadrate process of the pterygoid is shorter and articulates with an elongate process o
. Carnegie Institution of Washington publication. THE UPPER TRIASSIC OF WESTERN TEXAS. 59 face of the skull the relation of the transverse to the pterygoid is very different in the two forms. In M. planirostris and pleimngeri the transverse lies external to the process of the pterygoid and articulates with it laterally instead of underlying it; the outer corner of the dependent process is formed entirely by the transverse; the palatine foramen is small, but lies anterior to the middle of the transverse; the quadrate process of the pterygoid is shorter and articulates with an elongate process of the quadrate; the suture, as figured by McGregor, lies, at least on the lower face, near to the basisphenoid process of the pterygoid; there is but a small interpterygoid space and the parasphenoid process is short or in large part covered by the pterygoids; the internal nares are directly beneath the external nares; the inner edges of the palatines are elevated, but do not show the rugosity which appears on these bones in Promystriosuchus. It is apparently this ele- vated edge of the palatines which Huene' refers to as the median edge of the B FIG. 24.—Phytosauriis (Machceroprosopus), after Mehl. A. Lateral view of skull. B. Upper view of skull. C. Posterior view of skull. D. Posterior view of skull of Mystriosuchus, after McGregor. E. Posterior view of skull of Phytosaurus kappfi. Lettering as usual. COMPARISON WITH Most of the material representing this genus was recovered from the Triassic coal-beds of Egypt, Chatham County, North Carolina. Most of the skulls, as reported by McGregor, are in a very fragmentary condition; a single skull, lacking the anterior end, permits of some comparison. The antorbital opening extends beyond the anterior edge of the external nares; the orbits have a considerable lateral presentation; the parieto-squamosal bar is depressed; the squamosal region extends well posterior to the occipital condyle; the palatine vac
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