. Comparative dental anatomy. Teeth; Dentistry. THE TEETH OF MAMMALS 127 the canines are feeble in most species, garoos (Fig. 41) have the formula,— The Kan- 3-3 l-i 0-0 0-0 1-1 1-1 m. 4-4 4-4 28. The upper central incisors are large cutting teeth; the lower centrals are large and chisel-shaped, and project forward horizontally with an interval between them (Fig. 41-A). The two halves of the. Fig. 41-A.—Roentgenogram of teeth of Kangaroo (Macropus gigan- teus). (By Dr. E. H. Skinner.) lower jaw are separate and movable, for shearing grass with the horizontal lower incisors. The ca- nines
. Comparative dental anatomy. Teeth; Dentistry. THE TEETH OF MAMMALS 127 the canines are feeble in most species, garoos (Fig. 41) have the formula,— The Kan- 3-3 l-i 0-0 0-0 1-1 1-1 m. 4-4 4-4 28. The upper central incisors are large cutting teeth; the lower centrals are large and chisel-shaped, and project forward horizontally with an interval between them (Fig. 41-A). The two halves of the. Fig. 41-A.—Roentgenogram of teeth of Kangaroo (Macropus gigan- teus). (By Dr. E. H. Skinner.) lower jaw are separate and movable, for shearing grass with the horizontal lower incisors. The ca- nines are absent, and the premolars are shaped for cutting and well developed. The molars have tubercular ridged crowns. The Bandicoots have canines and more incisors than the Kangaroos, with the molar series more cuspidate. The American Opossum has the formula,—. 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 Thompson, Alton Howard, 1849-1914; Dewey, Martin, 1881-. St. Louis, C. V. Mosby
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