. Beginners zoology. Zoology. !04 BEGINNERS' ZOOLOGY except the rabbits, which have six (see Fig, 345). They are reacHly recognized by their lai'ge incisors. These teeth grow throughout Hfe, and if they are not constantly worn. Fig. 371. — Pouched Gopher {Geomys bursarius) x \, a. large, burrowing field rat, with cheek pouches for carrying grain. away by gnawing upon hard food, they become incon- veniently long, and may prevent closing of the mouth and cause starvation. The hard enamel is all on the front sur- face, the dentine in the rear being softer ; hence the in- cisors sharpen themselves
. Beginners zoology. Zoology. !04 BEGINNERS' ZOOLOGY except the rabbits, which have six (see Fig, 345). They are reacHly recognized by their lai'ge incisors. These teeth grow throughout Hfe, and if they are not constantly worn. Fig. 371. — Pouched Gopher {Geomys bursarius) x \, a. large, burrowing field rat, with cheek pouches for carrying grain. away by gnawing upon hard food, they become incon- veniently long, and may prevent closing of the mouth and cause starvation. The hard enamel is all on the front sur- face, the dentine in the rear being softer ; hence the in- cisors sharpen themselves by use to a chisel-like 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 Coleman, Walter M. Toronto : Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
