The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . lastron composed of 9plates but covered with 13 shields. This family, still representedby nearly 30 species, widi 8 genera, is found in South Americaand in Australia. Chelys fimhriata, the matamata in the rivers ofGuiana and North Brazil; total length about 3 ft; with animaldiet. Hydromedusa, tectifera, with very long nock, m Brazil,much resembling Chelodina. longicollis of the Australian region. Family 3. Carettocheh-didac.—Caretlochelys inscitlpta, the onlyspecies, in the Fly river of
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . lastron composed of 9plates but covered with 13 shields. This family, still representedby nearly 30 species, widi 8 genera, is found in South Americaand in Australia. Chelys fimhriata, the matamata in the rivers ofGuiana and North Brazil; total length about 3 ft; with animaldiet. Hydromedusa, tectifera, with very long nock, m Brazil,much resembling Chelodina. longicollis of the Australian region. Family 3. Carettocheh-didac.—Caretlochelys inscitlpta, the onlyspecies, in the Fly river of New Guinea; still imperfectly peculiar turtle seems to stand in the same relation to the Chely-didae and to the Trionychidae as do the Chelonidae to the Testu-dinidae by the transformation of the limbs into paddies with only twoclaws, an4 the complete reduction of the horny shields upon theshell, which is covered with soft skin. The plastron is composedof 9 plates; the 6 neural plates are all separated from one anotherby the costals. The premaxilla is single, as elsewhere only in. Fig. -Upper view of the Turtle of the Euphrates {TrionyXeupkratica). Chelys and in the Trionychidae. The neck Is short and of shell about 18 in. Super-family 3. Trio nyc ho idea.—The shell is very flat and muchsmaller than the body, and covered with soft leathery skin, buttraces of horny structures arc still represented, especially in theyoung of some species, by numerous scattered little spikes on theback of the shell and even on the soft parts of the back. The limbsare short, broadly webbed and only the three inner digits are pro-vided with claws. Head and neck are retractile, bendmg in a sig-moid curve in a vertical plane. The jaws are concealed by softlip-like flaps and the nose forms a short soft proboscis. _ The tem-poral region is not covered in by any arches; the quadrate is trumpet-shaped as in the Chelydidae, but the jugular arch is pelvis i
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
