. American animals; a popular guide to the mammals of North America north of Mexico, with intimate biographies of the more familiar species. Mammals. RODENTS OR GNAWING ANIMALS (Glires) Animals of this group may be recognized at once by the peculiar arrangement of their teeth. In the front of the mouth are two large conspicuous teeth (incisors) in each jaw, which meet vertically like two pairs of chisels, and form a very power- ful apparatus for gnawing or cutting. The remaining teeth are broad flat-topped grinders (molars) placed in the back of the mouth while between the two, where the teari
. American animals; a popular guide to the mammals of North America north of Mexico, with intimate biographies of the more familiar species. Mammals. RODENTS OR GNAWING ANIMALS (Glires) Animals of this group may be recognized at once by the peculiar arrangement of their teeth. In the front of the mouth are two large conspicuous teeth (incisors) in each jaw, which meet vertically like two pairs of chisels, and form a very power- ful apparatus for gnawing or cutting. The remaining teeth are broad flat-topped grinders (molars) placed in the back of the mouth while between the two, where the tearing teeth (canines) of the carnivorous animals are situated, the jaws are quite bare. The large gnawing teeth are further peculiar in being curved and. Longitudinal section through Beaver skull. I Incisor tooth showing long curved base. M The four molars. (After Lydekker.) deeply rooted in the jaws, while they also grow continuously from the base as they wear away at the tip, so that they never become "worn ; Rodents range in size from the beaver to the mouse and in habits they exhibit the greatest diversity; some are burrowers, as the gophers and marmots, others are terrestrial as the rabbits, still others Uke the muskrat are aquatic, while the flying squirrel is even able to launch himself through the air. 71. 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 Stone, Witmer, 1866-1939; Cram, William Everett, 1871-. New York, Doubleday, Page & Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmammals, bookyear1902
