. Text-book of zoology for schools and colleges. Zoology. Fig. 155.—a, Skull of the Beaver (after Owen); B, DiaOTfan of one of the incisor teeth of a Bodent, showing the chisel-shaped point, a Enamel; d Soft tooth-substance (dentine). incisors in the upper jaw (sometimes four), but there are never more than two in the lower jaw. The molar teeth are few in number (rarely more than four on each side of each jaw). The feet are usually furnished with five toes each. The most characteristic point about the Rodents is to be found in the structure of the incisor teeth, which are adapted for continuou
. Text-book of zoology for schools and colleges. Zoology. Fig. 155.—a, Skull of the Beaver (after Owen); B, DiaOTfan of one of the incisor teeth of a Bodent, showing the chisel-shaped point, a Enamel; d Soft tooth-substance (dentine). incisors in the upper jaw (sometimes four), but there are never more than two in the lower jaw. The molar teeth are few in number (rarely more than four on each side of each jaw). The feet are usually furnished with five toes each. The most characteristic point about the Rodents is to be found in the structure of the incisor teeth, which are adapted for continuous gnawing. They grow from persistent pulps, and consequently continue growing as long as the animal ]Pia. 156.—Hamster (Criaetm vulgarit). They are large, long, and curved, and are covered in front with a layer of hard enamel, so that the softer parts of the tooth. 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 Nicholson, Henry Alleyne, 1844-1899. New York, D. Appleton and Co.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
