The animal kingdom : arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy . e, and Jerboas; but we carry their subdivision much further, from considerations founded on the form of their grinders. The Marmots {Arctomys, Gm.)— Have, it is true, the inferior incisors pointed, as in the greater number of animals comprised in thegreat genus of Rats; but, as in the Squirrels [to which superior group they indubitably appertain],they have five molars on each side above, and four below, all of them sharply tuberculated; accord-ingly, some of
The animal kingdom : arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy . e, and Jerboas; but we carry their subdivision much further, from considerations founded on the form of their grinders. The Marmots {Arctomys, Gm.)— Have, it is true, the inferior incisors pointed, as in the greater number of animals comprised in thegreat genus of Rats; but, as in the Squirrels [to which superior group they indubitably appertain],they have five molars on each side above, and four below, all of them sharply tuberculated; accord-ingly, some of the species are inclined to eat flesh, and feed upon insects as well as vegetables. Theyhave four toes, and a tubercle in place of a thumb, to their fore-feet; and five toes to their hind other respects, these animals are nearly the direct reverse of the Squirrels; being heavy, with shortlimbs, a hairy tail of middle length or short, a large flat head, and they pass the winter in a state of • The Opossums were arrwiged among the Car^arin ill the iiuthots , t The iVoml).it presents the only inst.^nce ninoiigst the M,IT-. Fig 45.—The Ays aye. RODENTIA. 111 lethargy in deep holes, the entrance of which they close with a quantity of grass.* They live in society,ami are easily rendered tame. Two species are known in the Eastern continent. The Alpine Iklarmot (.Vim. nipiinu, Lin.), as large a liabbit,with a short tail, and yellowish-grey fur, more nsh-coloured towards the head, which inhabits lofty mountainsimmeiliately below the pen^etual snow line: and the Polish Marmot, or Uobac {M. bobac^ Lin.), the same size asthe other, and yellowish-grey, with a russet tint about the head ; it inhabits the lesser mountains ami hills fromIoland to Kamtschatka, and often burrows in the hardest g-roimd. Russian travellers in Ducharia mention someothers, as Aret. futviu, leptodactulm, and miuogariciu, which are perhaps not sufficiently determined. Americalikewise produces several
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