. Annals of natural history. Natural history; Botany; Zoology; Geology. 192 Mr. Owen on the Mammalian Remains, molar bears exactly the same proportion to the above-mentioned fossil posterior molar, which obtains in the corresponding teeth of the recent Macaci, I have no doubt that the two fossil teeth belong to the same extinct species of Macacus. The inferior molars in the genus Didelphys differ from the tooth in question in having the anterior and external angle cut off as it were vertically. 2. A portion of Jaw with one of the False Molars of a Mam- miferous Species, probably allied to the
. Annals of natural history. Natural history; Botany; Zoology; Geology. 192 Mr. Owen on the Mammalian Remains, molar bears exactly the same proportion to the above-mentioned fossil posterior molar, which obtains in the corresponding teeth of the recent Macaci, I have no doubt that the two fossil teeth belong to the same extinct species of Macacus. The inferior molars in the genus Didelphys differ from the tooth in question in having the anterior and external angle cut off as it were vertically. 2. A portion of Jaw with one of the False Molars of a Mam- miferous Species, probably allied to the Ge7ius Didelphys. (Fig. 2.) There is no tooth so little characteristic, or upon which a determination of the genus could be less safely founded, than one of the false molars of the smaller carnivorous and omnivo- rous Fe7^(E and Marsupialia. A large, laterally compressed, sharp-pointed middle cone or cusp, with a small posterior, and sometimes also a small anterior talon, more or less distinctly developed, is the form common to these teeth in many genera of the above orders. It is on this account, and because the tooth of the fossil in question (fig. 2 a.) dif- Fig. 2 a. fers in the shape of the middle and size of the accessory cusps from that of any known species of Didelphys, that I regard its refer- ence to that genus as premature, and the affi- nities of the species to which it belongs as outside, nat. size, awaiting further evidence before they can be determined be- yond the reach of doubt. Mr. Charlesworth, by whom the present fossil was first described and figured*, has accurately specified the differences above alluded to in the shape of the crown of the tooth as compared with the false molars of the true Opossums : they are seen in the more equiFateral or sym- metrical shape of the middle cusp, the greater development of the posterior talon, and the presence of the anterior talon at the base of the middle cusp : the grounds on which his de- termination of the fossil w
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