. Fourteen weeks in zoology. Zoology. CLASS mammals: order eodentia. 95 up hedgehog into the water; when the frightened animal, unrolling itself for an instant, will be caught by its crafty enemy before it can close up again. Mg. 155. ORDER RODENTIA. General Characteristics.âThe Eodents (gnawers) lack canine teeth, but have two upper and lower incisors fitted to gnaw bark, roots, woody stems, nuts, etc. These are long, slightly curved, chisel-edged, and deeply rooted in the jaw. Friction upon each other and constant growth at the base keep the edges sharp.* The molars are generally ridged tran
. Fourteen weeks in zoology. Zoology. CLASS mammals: order eodentia. 95 up hedgehog into the water; when the frightened animal, unrolling itself for an instant, will be caught by its crafty enemy before it can close up again. Mg. 155. ORDER RODENTIA. General Characteristics.âThe Eodents (gnawers) lack canine teeth, but have two upper and lower incisors fitted to gnaw bark, roots, woody stems, nuts, etc. These are long, slightly curved, chisel-edged, and deeply rooted in the jaw. Friction upon each other and constant growth at the base keep the edges sharp.* The molars are generally ridged transversely and the lower jaw moves backward and forward to aid in mastication. Most of the order have clavicles, and hence rotary motion of the fore paws, between which they hold their food while Skull of a Eodent. Q O With clavicles MOLAR TEETH WITH HOOTS ; TAIL LONG, It i- i THINLY HAIRED. J Tail varying, SCALY. Tail long, partially naked. Tail flattened, SCALY. Tail long, BUSHY. Tail short, BRISTLY. Jumping Monte. Moiue, Without clavicles ; MOLAR TEETH WITHOUT BOOTS; ,f i GeorayidaB, GopJier. y CastoridEB, Beaver. \ SciuridE, Squirrel. i HystricjdEB, Porcupine. Caviidse, Guinea Pig. [ Tail short, FURRY. â Leporidie, Giiiti' Bate. Jaculidae.âJumping Mice are remarkable for their cheek- pouches and long, zigzag leaps. There is but a single species In N"orth America. * If one of the incisors be brolcen off, its opposite continues to grow, some- times curving, in wliicti case at lengtti it loclis the jaw, and the wretched animal etarves to death. 5. 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 Steele, Joel Dorman, 1836-1886. New York, Chicago [etc. ] A. S. Barnes & Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1872
