The Marmots are characterised by very long, powerful incisors, strong claws, indicating burrowing habits, and by a tail of medium length, somewhat thickly garnished with hair. They have short limbs, and from that results the slowness of movement peculiar to them. The Marmots inhabit different chains of mountains in Europe, Asia and North America. They have nearly all the same habits; so that it will suffice if we speak of the common species, the only one, in fact, which has been well studied. The Common Marmot lives on the high peaks of the Swiss and Savoy Alps, in the vicinity of the glaciers. It forms small societies, composed of two or three families, and digs out burrows on the slopes exposed to the sun. These burrows have the form of the letter Y; the galleries are so very narrow that it is with difficulty the human hand can be inserted into them. At the extremity of one of these oblique shafts is found a spacious chamber of an oval form, in which the proprietors rest and sleep. The Marmots in a state of nature live exclusively on herbage. They crop off the shortest grass with wonderful rapidity. During fine weather they love to stretch themselves out, frisk, play or bask in the rays of the sun. Remarkable for caution, they never leave their retreats without taking the greatest precaution; the old venturing first, after carefully inspecting the neighborhood, then the others following. Feeding, playing, or basking, they lose nothing of their vigilance, for as soon as one has the slightest suspicion of danger, it utters a sharp bark of warning, which is quickly repeated by those near it, and in an instant the whole band rush into their burrow, or fly towards some place of concealment. After the Alpine Marmot, we may mention the Quebec Marmot, the Maryland Marmot, or Woodchuck, which is peculiar to various parts of North America, and the Bobac or Poland Marmot. The Prairie Dog is an allied species, which lives in extensive communities in the wild prairies of North America; their villages, as the hunters term their burrows, extending sometimes many miles in length. They owe their name to the supposed resemblance of their warning cry to the bark of small Dog. HARES AND RABBITS. [Illustration: RABBITS.] The animals composing this family have twenty-two molar teeth, formed of vertical layers joined to each other; the ears are very large and funnel-shaped, covered with hair externally, almost nude internally; the upper lip cleft; the tail is short, furry and ordinarily elevated; the hind feet are much longer than those in front, and are provided with five toes, while the fore feet have only four; the claws are but little developed; the feet are entirely covered with hair, above as well as below.