576 



PEOFESSOE OWEN ON THE FOSSIL MAMMALS OF AUSTEALIA. 



PLATE XXXIX. 



Fig. 1. Outside view of last upper molar (m 3) of a small, probably female, Uiprotodon. 

 Fig. 2. Outside view of last upper molar {m 3) of a larger, probably male, Di])rotodon. 

 Fig. 3. Sockets and ends of roots of penultimate and last upper molars. 

 Fig. 4. Outside view of lower incisor [an extent of an inch is wanting at the place of 

 fracture]. 



Fig. 5. Working surface of exposed end of lower incisor. 

 Fig. 6. Transverse section at its emergence from the socket. 

 Fig. 7. Side view of second upper incisor [i 2). 

 Fig. 8. Working surface of the same tooth. 



PLATE XL. 



Molar teeth of the lower jaw. 



Fig. 1, Outer side view of second molar (6? 4) of a young Biprotodon. 



Fig. 2. Working surface of second molar {d 4) of a young Uiprotodon. 



Fig. 3. Working surface of second molar of an older, probably female, Diprotodon. 



Fig. 4. Working surface of second molar of an old, probably male, Uiprotodon. 



Fig. 5. Outer side view of third molar (m 1) of a young Uiprotodon. 



Fig. 6. Working surface of third molar [m 1) of a young Uiprotodon. 



Fig. 7. Working surface of third molar [m 1} of an older, probably female, Uiprotodon. 



Fig. 8. Working surface of third molar (ml) of an old, probably male, Uiprotodon. 



Fig. 9. Outer side view of fourth molar {in 2) of a young Uiprotodon. 



Fig. 10. Working surface of fourth molar (m2) of a young Uiprotodon. 



Fig. 11. Working surface of fourth molar (w 2) of mature, probably male, Uiprotodon. 



Fig. 12. Outer side view of crown of germ of fifth molar of a young Uiprotodon. 



Fig. 13. Front view of fifth molar of a mature Uiprotodon. 



Fig. 14. Working surface of penultimate lower molar of Macropus Atlas. 



Fig. 15. Working surface of penultimate lower molar of a Malayan Tapir. 



Fig. 16. Working surface of crown of incomplete fifth molar of a young Uiprotodon. 



Fig. 17. Working surface of penultimate molar (m 2) of an old Uiprotodon. 



Fig. 18. Working surface of last molar {m 3) of an old Uiprotodon. 



Figures 1, 2, 5, 6, 9, 10, 12, 10 are from the same individual. 



All the figures are of the natural size. ■ 



PLATE XLI. 



Fig. 1. Outside view of anterior part of mandible and teeth (H, 4, m 1) of an immature 



IHprotodon : the first molar {d 3} is given in outline. 

 Fig. 2. Inside view of anterior part of the same mandible and teeth (H, d 3 restored in 



outline, 4, i/i 1). 



