. An introduction to the study of zoology. Zoology. 298 AN INTRODUCTION TO ZOOLOGY. tivity, their teeth, grow inconveniently long, through want of use, and may even cause the death of the animal by penetrating the opposite jaw. Hence a tame rat, if not allowed at large, should be supplied with a piece of wood to gnaw at. The outside edge of. Fig. 121.—Kodent dentition al a Marsupial, the Wombat, PIuiscalom]/s ITombat. Dental Formula, —— _; incisors and molars both growing from persistent pulps. .4, upper jaw; B, lower jaw; C, single molar. these incisors is protected by hard enamel, while the
. An introduction to the study of zoology. Zoology. 298 AN INTRODUCTION TO ZOOLOGY. tivity, their teeth, grow inconveniently long, through want of use, and may even cause the death of the animal by penetrating the opposite jaw. Hence a tame rat, if not allowed at large, should be supplied with a piece of wood to gnaw at. The outside edge of. Fig. 121.—Kodent dentition al a Marsupial, the Wombat, PIuiscalom]/s ITombat. Dental Formula, —— _; incisors and molars both growing from persistent pulps. .4, upper jaw; B, lower jaw; C, single molar. these incisors is protected by hard enamel, while the inside edge is not; hence the inner edge wears down first, and thus the outside edge is always kept very sharp. Similar sharp edges of enamel are maintained on the molars by the presence of edges of 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 Lindsay, B. London, S. Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
