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PEOFESSOE OWEN ON THE FOSSIL MAMMALS OF AUSTEALIA. 



PLATE XL. 



Fig. 1. Inner side view of the fore part of a right mandibular ramus and teeth., Phasco- 

 lomys gigas. 



Fig. 2. Outer side view of incisor of the same fossil. 



Fig. 3. Working-surface of the same incisor. 



Fig. 4. Transverse section of the same incisor. 



Fig. 5. Outer side view of the same fossil (without reversing). 



Fig. 6. Upper view of a portion of the left mandibular ramus and last four molars of a 

 smaller Phascolomys gigas. 



All the figures are of the natural size : the symbols and letters of reference are 



explained in the text. 



