MACROPODIDiE. 237 



46310. Hinder part of the right ramus of the mandible, containing 

 {Fig.) the last three true molars and a fragment of ^71 ; from 

 the Pleistocene of King's Creek, Clifton, Queensland. 

 This specimen is the type, and is figured by Owen in the 

 ' Phil. Trans." 1874, pi. Ixxvi. figs. 7-10, under the name 

 of Pachysiagon otuel, and also in the ' Extinct Mammals 

 of Australia,' pi. Ixxxix., as Procoj^todon pusio. 



Presented hy G. B. King, Esq., 1874. 



46310 a. The greater part of the symphysis and right ramus of the 

 {Fig.) mandible, showing portions of ^^^2 and ^73 and the entire 

 i^Ti : from Queensland. Figured by Owen in the ' Extinct 

 Mammals of Australia,' pi. xci. figs. 2, 3, as P. pusio. 



Same history. 



38759. Part of the right ramus of the mandible, containing the 

 {Fig.) five cheek-teeth ; from Queensland. Figured by Owen, 



op. cit. pi. xci. fig. 5, as P. pusio. 



Presented hy F. N. Isaac, Esq., 1861. 



38760. Fragment of the left ramus of the mandible, showing ^TS 



and m. 4, in which the enamel-folds are more strongly 

 marked than in the preceding specimens ; from Darlino- 

 Downs, Queensland. 



Presented hy F. J\\ Isaac, Esq., 1861. 



Genus PALORCHESTES, Owen/. 



The mandibular symphysis is anchylosed, and both this and the 

 ramus are elongated ; the diastema is long. The premolars are like 

 those of Stlienurus ; the true molars are without corrugations of the 

 enamel, and have no distinct anterior talon ; in the lower molars 

 the median longitudinal bridge is tail, and forms the continuation 

 of the curved outer extremity of the hinder ridge. There are no 

 palatal vacuities ; and the lower incisors are spatulate. 



In the absence of an anterior talon the upper true molars resemble 

 those of the existing Macropus magnus, Owen ; while the lower 

 ones approximate to those of some specimens of Nototlierium. 



Palorchestes azael, Owen -. 



Syn. Palorchestes crassus, Owen ^. 



This is the type and only species, and is the largest known member 



1 PhU. Trans. 1874, p. 797. - Ihid. p. 798. 



3 Trans. Zool. Soc. vol. xi. p. 7 (1880). 



