On an Extinct Chelonian Reptile ( Notochelys costata , Owen), from Australia

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Abstract
Hitherto the fossil reptilian remains transmitted to me for description from Austrralia have been limited to parts of the skeleton of asteh great horned Lacertian ( Megalania prisca , Ow.). The first evidence of a Chelonian from that continent was sent in the present year (1881), by our fellow Member Professor Archibald Liversidge, of the University of Sydney, New South Wales. He kinldy permitted a mould to be taken of the specimen, with the request that the original should be returned to him after a description and figure bad appeared. The mould and casts are in the British Museum, Cromwell Road. The specimen was found in a formation at Flinders River, Queensland; but the nature and age of the deposit are not stated. It is petrified and, with the imbedding matrix, of great weight. The fossil consists of an anterior portion of the carapace (fig. 1) and of the plastron (fig. 2) brought into unnaturally close contact by phosthumous pressure. The preserved part of teh plastron includes the right and left coalesced hyo- and hyposternals (fig. 2, hps,r , and hps, l ), indications of teh episternals and the entosternal; and, anterior to these parts of the plastron, both scapulo-acromial bones( 51 ) have been brought into view.

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