331 



of the bone differs in a marked degree in the two extinct gigantic species. 

 The characteristic production of the outer and posterior angle of the 

 outer condyle and the deep small cavity above it are as well marked in 

 this as in the preceding fossil. 



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. 



1529. The distal end of the right femur of a smaller individual, perhaps a 



female, of the same species apparently as the preceding fossil : it shows 

 that the inner division of the rotular articular surface is more prominent 

 and extensive than in the Macropus major : the general correspondence 

 is very close ; the circumference of this fragment is ten inches. 



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. 



1530. A segment, two inches long, from the middle of the shaft of the left 



tibia of a Kangaroo, probably Macropus Titan. On the fractured surface 

 may be seen the characteristic compact walls of the medullary cavity, 

 and the absence of a loose cancellous structure on the inner surface : the 

 fragment also shows the commencement of that rough flattened surface, 

 below the external ridge of the tibia, to which the hbula is attached. 

 This fragment is four inches seven lines in circumference ; the corre- 

 sponding tibia, one foot nine inches long, of a large male Macropus 

 laniger is three inches and a half in circumference at the corresponding 

 part of the shaft. 



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. 



1531. The os calcis of a Kangaroo, either Macropus Atlas or Macropus Titan : it 



measures four inches in length, but has belonged to a young animal, as 

 the line of the junction of the terminal epiphysis is not obliterated. It 

 differs from the os calcis of the Macropus major not only in size, but in 



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