PROFESSOE OAVEN ON THE FOSSIL MAMMALS OF AUSTRALIA. 



577 



PLATE XLII. 



Fig. 1. Section of upper molars (771 1, m 2, m 3) of a mature, not old, Mprotodon. 

 Fig. 2. Inside view of mandible and teeth of ditto: reduced to one-sixth. 

 Fig. 3. Back view of mandibular condyle : reduced to one-sixth. 

 Fig. 4. Front view of ditto. 



Fig. 5. Section of anterior part of mandible and incisor tusk of an immature iJipro- 

 todon. 



PLATE XLIIL 



Fig. 1. Axis, or vertebra dentata: — nat. size. 

 Fig. 2. Portion of atlas vertebra : — nat size. 



PLATE XLIV. 



Fig. 1. Front view of axis. 



Fig. 2. Under view of axis. 



Fig. 3. Back view of axis. 



Fig. 4. Back view of third cervical vertebra. 



Fig. 5. Back view of an anterior dorsal vertebra. 



Fig. 6. Side view of the same dorsal vertebra. 



Fig. 7. Side view of a succeeding dorsal vertebra. 



Fig. 8. Back view of the same vertebra. 



Fig. 9. Side view of the body of a lumbar vertebra. 



Fig. 10. Back view of ditto. 



Fig. 11. Under view of ditto. 



Fig. 12. Epiphyses of the body of a cervical vertebra: a, edge- or side-view. 

 Fig. 13. Epiphyses of the body of a lumbar vertebra: a, edge-view. 

 All the figures are one-third the natural size. 



PLATE XLV. 

 Fig. 1. Outer surface or "dorsum" of the left scapula. 

 Fig. 2. Inner or subscapular surface of the left scapula. 

 Fig. 3. Articular end, with glenoid cavity of the left scapula. 



One-third the nat size. 



PLATE XLVI. 



Fig. 1. Back view of left humerus. 

 Fig. 2. Front view of left humerus. 

 Fig. 3. Proximal end of left humerus. 

 Fig. 4. Distal end of left humerus. 



Fig. 5. Inner side view of distal third of a right humerus. 



One-third the nat. size. 



