. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. CROCODILIANS, LIZARDS, AND SNAKES. 243 process is median, short, and deourved. The iscliia have a long, com- mon suture, and are deflected downward, meeting at less than a right angle. Tuber a prominent angle. The ilium presents a short subacute angle, representing the crista. There is a deep posterior notch of the acetabulum. In Dipsosaurus dorsaUs all the teeth on the maxillary bone are tri- cuspidate; those on the premaxillary are mostly
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. CROCODILIANS, LIZARDS, AND SNAKES. 243 process is median, short, and deourved. The iscliia have a long, com- mon suture, and are deflected downward, meeting at less than a right angle. Tuber a prominent angle. The ilium presents a short subacute angle, representing the crista. There is a deep posterior notch of the acetabulum. In Dipsosaurus dorsaUs all the teeth on the maxillary bone are tri- cuspidate; those on the premaxillary are mostly simple, but one or two external ones show a rudimental lateral cusp. In the only known species the colon is well developed, and the small intestine is elongate. Its habits are herbivorous, as I have taken remains of flowers from their stomachs. DIPSOSAURUS DORSALIS Baird and Girard. Dipsosaurus dorsalis Hallowell, Proc. Acad. Nat. Sci. Phila., VII, 1854, p. 92; Kept. U. S. Expl. Surv., XIII, Pt. 4, p. 7, pi. vi, fig. 1.—Baird, U. S. Mex. Bound. Surv., Herp., 1859, p. 8, pi. xxxii, figs. 7-13.—Bocourt, Miss. Sc. Mex., Kept., 1874, p. 146.—Boulenger, Cat. Liz. Brit. Mus., 2d ed., , II, p. 201.—Van Denburgh, Proc. Cal. Acad. Sci., 1895, p. 92. Crotaphytus dorsalis Baird and Gikard, Proc. Acad. Nat. Sci. Phila., 1852, p. Fig. 18. DirsosAURus DORSAUS Baird and Girard. Xf. Fort Yuma, Arizona. Cat. No. 2730, Head small, scarcely as wide as the neck, or more than half the length of hind foot; rather longer than broad; muzzle blunt: forehead sloping very rapidly. A single gular fold. The scales on the chin large, granular, and nearly even. A conspicuous ridge on the back from head to middle of tail, formed of a single series of scales larger. 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 work.
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