. Comparative dental anatomy. Teeth; Dentistry. 134 COMPARATIVE DENTAL ANATOMY there is a corresponding antero-posterior move- ment of the jaw. In some of the semi-carnivo- rous species, like the rats and mice, the molars are tubercnlate, and much wear renders them cup-shaped like the much-worn molars of man. The American Beaver (Fig". 44) is one of the larg-. FlG. 44.—Teeth of Beaver (Castor canadensis). Occlusal view. est living members of the order. It has the formula,— 1_1 c' 0-0 P 0-0 4-4 It has exceedingly large, strong, scalpriform in- cisors, with which it cuts down small trees fo
. Comparative dental anatomy. Teeth; Dentistry. 134 COMPARATIVE DENTAL ANATOMY there is a corresponding antero-posterior move- ment of the jaw. In some of the semi-carnivo- rous species, like the rats and mice, the molars are tubercnlate, and much wear renders them cup-shaped like the much-worn molars of man. The American Beaver (Fig". 44) is one of the larg-. FlG. 44.—Teeth of Beaver (Castor canadensis). Occlusal view. est living members of the order. It has the formula,— 1_1 c' 0-0 P 0-0 4-4 It has exceedingly large, strong, scalpriform in- cisors, with which it cuts down small trees for the purpose of building the dams for which it is fa- mous. The molars are strong, with the tissues arranged like those of the molars of the Ungulates for the purpose of reducing the resisting vege-. 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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