324 



Genus Macropus. 



1510. A considerable proportion of the right superior maxillary bone of the 

 extinct Titan Kangaroo (Macropus Titan, Owen), with five molar teeth 

 in situ ; the crowns of the first and second are broken away, those of the 

 third and fourth are worn upon the summits of the two principal trans- 

 verse ridges, and those of the fifth molar are entire. The posterior molars 

 differ from those of the two largest existing species of Kangaroo, viz. 

 the Macropus major and Macr. laniger, in the more distinct development 

 of the posterior basal ridge, and in the more complex form of the median 

 longitudinal ridge connecting the two principal transverse eminences ; 

 they present the same differences with a less proportional breadth of the 

 tooth as compared with the equally gigantic extinct species called Ma- 

 cropus Atlas. 



From the alluvial or newer tertiary deposits in the bed of the Conda- 

 mine River, west of Moreton Bay, Australia. 



Presented by Lieut. -Col. Sir T. L. Mitchell, C. B. 



1510'. A corresponding portion of the right superior maxillary bone of the 

 great Red Kangaroo (Macropus laniger), with the four posterior or true 

 molar teeth in situ ; their roots are exposed from the outside. The 

 animal to which this jaw belonged was killed by Mr. Gould between the 

 rivers Murray and Adelaide, Australia ; it measured eight feet two inches 

 from the nose to the extremity of the tail, and was the largest Kangaroo 

 which he saw in Australia, or of which any record has reached Europe. 



Presented by John Gould, Esq., F.R.S. 



1511. A portion of the right ramus of the lower jaw of the Macropus Titan, 

 with the three posterior molar teeth ; these differ from the correspond- 

 ing molars of the Macropus major and Macropus laniger, as well as 

 from those of the extinct Macropus Atlas, in the greater anteropos- 

 terior extent of the anterior basal ridge or talon, and from the latter 

 species also in the greater antero-posterior extent of the base of the 

 two principal transverse eminences and in the absence of the posterior 



