302 



two flattened facets of the shaft of the tibia meet at the same open angle, 

 as in the present fragment, which accords in size, colour and mineralized 

 condition with the portions of the jaw of the Diprotodon australis, Nos. 

 1460 and 1461. 



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.Ii. 



1484. The distal end, apparently of a fibula, of a large mammalian quadruped: 



it presents a subtrihedral form, and is seven inches in circumference ; the 

 centre of the shaft is occupied by a close cancellous texture ; the arti- 

 cular extremity is much abraded, but a trace of the line of union of the 

 epiphysis to the shaft may be discerned. This fragment presents the 

 same ponderous mineralized condition as the preceding specimen. 



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. 



1485. A fragment of apparently the proximal end of a long bone of a large 



quadruped. It is trihedral, slightly twisted, and acquires a form which 

 yields an oval transverse section as it descends. A portion of a nearly 

 flat articular surface projects obliquely forwards, and from above down- 

 wards and inwards : the upper part of this surface is defined by a groove, 

 which sinks into a slight depression ; above this the bone rises in the 

 form of a broad flattened process, which has been broken off about two 

 inches below the articular surface ; there is the orifice of a canal for the 

 medullary artery, which, on the supposition that this is a proximal end of 

 the bone, is directed slightly upwards ; the broken end of the bone below 

 this part shows no medullary cavity, but a close cancellous texture, bounded 

 by a compact wall from one to two lines in thickness : the circumference 

 of this extremity of the fragment is seven inches. It presents the same 

 heavy mineralized condition as the foregoing specimens. 



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

 mine River, west of Moreton Bay, x\ustralia. 



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



