. The Ceratopsia. Ceratopsia. Fig. 14.—1, Right squamosal of Torosaurus gladius (type), No. 1831, Yale Museum; inferior view. 2, Right squamosal of Triceratops flabellatus (type), No. 1824, Yale Museum; inferior view. 3, Right squamosal of Ceratops montanus (cotype), No. 4802, U. S. National Museum; inferior view, e, Epoceipital; s, parietal surface; q, quadrate groove. All one-twentieth natural size. After Fig. 15.—Inferior view of right squamosal of Triceratops flabellatus (type), No. 1821, Yale Museum, e, Epoceipital; sp, surface for contact with parietal; ex, buttress for exoccipit
. The Ceratopsia. Ceratopsia. Fig. 14.—1, Right squamosal of Torosaurus gladius (type), No. 1831, Yale Museum; inferior view. 2, Right squamosal of Triceratops flabellatus (type), No. 1824, Yale Museum; inferior view. 3, Right squamosal of Ceratops montanus (cotype), No. 4802, U. S. National Museum; inferior view, e, Epoceipital; s, parietal surface; q, quadrate groove. All one-twentieth natural size. After Fig. 15.—Inferior view of right squamosal of Triceratops flabellatus (type), No. 1821, Yale Museum, e, Epoceipital; sp, surface for contact with parietal; ex, buttress for exoccipital; qg, quadrate groove; p, process overlapping quadratojugal; /, margin forming posterior border of lateral temporal fossa; pfs, postfrontal border; jp, process interposed between jugal and postfrontal; cxs. surface overlapped by exoc- cipital process. One-eighth natural size. partial absence of this character as of generic importance, and has made it distinctive of the genus Sterrholoj)hus, of which the present specimen was the type. To the present writer it would seem, however, that the difference in the rugosity of the external surface of the squamosal is due rather to a difference in the age of the different individuals, while i( may also have been, in part at least, a sexual character. In support of this view it may be mentioned that the rugosities on this surface are less distinct in those specimens where the sutures are less obliterated. 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 Hatcher, J. B. (John Bell), 1861-1904; Lull, Richard Swann, 1867-1957; Osborn, Henry Fairfield, 1857-1935; Marsh, Othniel Charles, 1831-1899. Washington, Govt. Print. Off.
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