ON A SUPPOSED NEW SPECIES OF NOTOTHERIUM. By C. W. De Vis, M.A. For some time it has appeared with increasing probability that the series of Nototheroid jaws forming part of the Queensland collection includes representatives of a Nototherium distinct from N. mitcJielli, Ow., distinct also from N. mermis, Ow., a species which has not as yet been met with by the collectors or friends of the Museum. The suspicion originally based on the very backward position of the inlet of the dental canal in a mandibular fragment, was partially confii-med by a mandible retaining one of its premo-lars ; but this tooth was ground down almost to its base, and al-though it presented appearances irreconcileable with those which would probably be yielded by a premolar of N .mitchelli (as identified by Sir E.. Owen) similarly abraded, it did not, or rather could not, va. such condition inspire full confidence in its distinctiveness. All such ground for hesitation has however been removed by the the acquisition of a lately adult jaw in which the premolar is well preserved ; the specific differences displayed by it are obvious, and may be allowed to determine the presence of a third species in the drifts of the Darling Downs, for which may be proposed the name, if an excusable one, Nototherium dunexse. Diagnostic characters: — Tusk-like incisors well developed; pre-molar (p") small, subtriangular, uniiobate; inlet of dental canal much behind postmolar angle and much above alveolar level ; exterobasal ridges of molars interrupted ; talons anterior and posterior well-developed; molars gradually enlarged; inner symphysial curve opposite hinder lolje of m\
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