MACEOPODIB^. 231 



33896. Fragment of the left maxilla, containing the last three true 

 molars ; from the same locality. Purchased, 1857. 



32903. Hinder part of the right ramus of the mandible, containing 

 {Fig.) the last two true molars ; from the same locality. This 

 specimen is the type, and is figured by Owen in the ' Phil. 

 Trans.' 1874, pi. Ixxxi. fig. 4, and pi. Ixxxii. figs. 3, 4, and 

 also in the ' Extinct Mammals of Australia,' pi. xcvi. fig. 4, 

 and pi. xcvii. figs. 3, 4. Same 



40005. Fragment of the right ramus of the mandible, containing 

 ra. 2 and m. 3 ; from the Pleistocene of Queensland. This 

 specimen is the type of Leptosiagon gracilis of Owen, and 

 is figured by him in the ^ Phil. Trans.' 1874, pi. Ixxvi. 

 figs. 11-15, and also in the ' Extinct Mammals of Aus- 

 tralia/ pi. Ixxxix. figs. 11-15. Allowing for the diff'er- 

 ence in their wear, the third molar of this specimen 

 presents no characters by which it can be distinguished 

 from the corresponding tooth of No. 32903. 



Presented hy Sir D. Cooper^ Bart.^ 1866. 



46917. Fragment of the right ramus of the mandible, showing the 

 imperfect m. 2 and m73 in use and m. 4 in alveolo ; from 

 the Pleistocene of Kirban, Mendoran, New South Wales. 

 The teeth of this specimen agree precisely with those of 

 the last. Presented by W. L. R. Gibhs, Esq., 1875. 



46916. Fragment of a left maxilla, from the same locality as the 

 preceding specimen, containing the last three true molars 

 in an imperfect condition, and not improbably belonging 

 to the same species. Same history. 



Genus STHENURUS, Owen\ 



Syn. Protemnodon, Owen ^ {in parte). 



The fourth upper premolar develops a complete inner and the 

 lower one a corresponding outer lobe, so that the worn crowns 

 of these teeth present oval, flat surfaces, and have no secant edge. 

 The true molars have no vertical enamel-folds, and are short and 



^ Phil. Trans. 1874, p. 264. 



2 Ihid. p. 274. In describing the immature maxillae (Phil. Trans. 1874, 

 pi. xxiii. fige. 4-9) on which Frotemnodon was founded, Owen mistook the inner 

 lobe of pm- 4 (which was the only part he saw) for the inner surface of the 

 outer lobe, and consequently concluded that there was no inner ridge or tubercle 

 to this tooth. He therefore regarded the tooth as being of a more secant type 

 than pm. 4 of Macropus, and consequently associated it with the secant lower 



