The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . Except in Bdideus breviceps (Furbes, Proc. Zool. Soc, 1881,p. 188),. have two incisors below and as many as six above, threeon each side, but of these the first or central pair is themost fully developed. Though this division is extremely convenient, a difficultyin accepting it asmarking a radicalseparation of theorder into two pri-mary stocks is causedby the Peramelidse,which
The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . Except in Bdideus breviceps (Furbes, Proc. Zool. Soc, 1881,p. 188),. have two incisors below and as many as six above, threeon each side, but of these the first or central pair is themost fully developed. Though this division is extremely convenient, a difficultyin accepting it asmarking a radicalseparation of theorder into two pri-mary stocks is causedby the Peramelidse,which combine a poly-protodont form ofdentition with a pecu-liar structure of thehind feet, so exactlyresembling that ofsome of the best-marked diprotodonts,as the Kangaroos,that it is difficult tobelieve that it canhave been developedindependently. Tak-ing various combina-arcfostions of characters wvurointo consideration, the existing Marsupials readily groupthemselves into six very natural fcjnilies, the characters ofwhich can be thus defined :—A. Teeth rooted. a. Pobjjnotodmi. — Incisors numerous, small, subequal. Canines larger than the iucisors. Molars with 8liari>tubercles. a. Iucisors {. Hind feet with the four outer toes sub-equal, distinct, and a well-developed opposabl
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Keywords: ., bookauthorbaynesth, bookcentury1800, bookdecade1890, bookyear1892
