. Zoology for high schools and colleges. Zoology. ORDER OF RODENTS. 583 condyles of the lower jaw are longitudinal, not received in spe- cial glenoid sockets,but gliding freely backwards and forwards in longitudinal furrows. The feet are adapted for walking and climbing or burrowing, the claws being well developed. A peculiarity in the incisors is that they grow out as fast as they are worn down ; this is due to the fact that the pulp is persistent; the enamel in front causes them to wear away. Kg. 503.—American Flying Squirrel (Sciuroplerus volucella) behind so that they are chisel-shaped. Th
. Zoology for high schools and colleges. Zoology. ORDER OF RODENTS. 583 condyles of the lower jaw are longitudinal, not received in spe- cial glenoid sockets,but gliding freely backwards and forwards in longitudinal furrows. The feet are adapted for walking and climbing or burrowing, the claws being well developed. A peculiarity in the incisors is that they grow out as fast as they are worn down ; this is due to the fact that the pulp is persistent; the enamel in front causes them to wear away. Kg. 503.—American Flying Squirrel (Sciuroplerus volucella) behind so that they are chisel-shaped. The species are pro- lific, live mostly on vegetable food, and are of small size; the muskrat, beaver, and capybara being the largest mem- bers of the group. The flying squirrels (Fig. 503) take short flights by means of the expansion of the skin between the fore and hind legs. The Norway lemmings are notice- able for their remarkable migrations from the elevated. 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York, H. Holt and Company
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
