PROFESSOR OWEN ON THE FOSSIL MAMMALS OF AUSTRALIA. 
575 
Description of the Plates. 
PLATE XXXV. 
Fig. 1. Side view of skull of Diprotodon australis: — one-fifth nat. size. 
Fig. 2. Back view of skull of Di'protodon australis : — one-fifth nat. size. 
Fig. 3. Front view of skull of Diprotodon australis : — one-fifth nat. size. 
Fig. 4. Proportions of malar and squamosal forming glenoid cavity : — one-fifth nat. size. 
Fig. 5. Side view of skull, in outline, of Macropus laniger : — one-fifth nat. size. 
PLATE XXXVI. 
Fig. 1. Outer side of first incisor, upper jaw: — nat. size. 
Fig. 2. Inner side of first incisor, upper jaw: — nat. size. 
[An extent of an inch of the tooth is wanting at the place of fracture.] 
Fig. 3. Outer or enamelled side of working extremity of a first, incisor. 
Fig. 4. Outer or enamelled side of working extremity of a first incisor from another 
individual. 
Fig. 5. Section, vertical and transverse, of premaxillary alveoli, with the first incisors, 
i 1, in situ: i 2, end of the socket of the second incisor; i 3, part of that of 
the third incisor. 
Fig. 6. Basal or inserted end of first incisor; the margin mutilated. 
Fig. 7. Basal or inserted end of second incisor. 
All the figures are of the natural size. 
PLATE XXXVII. 
Fig. 1. Outer side view of the right upper molars, in situ , of probably a female Diprotodon. 
Fig. 2. Grinding-surface of ditto. 
Fig. 3. The three last molars of another Diprotodon. 
Fig. 4. Grinding-surface of crown of last molar (m 3) of a larger Diprotodon. 
Fig. ,5. Front view of the same tooth. 
Fig. 6. Back view of the same tooth. 
All the figures are of the natural size. 
PLATE XXXVIII. 
Fig. 1. Outer side view of the right upper molars, in situ, of a large, probably male, 
Diprotodon. 
Fig. 2. Grinding-surface of ditto, with part of bony palate. 
Fig. 3. Hind surface of last molar (to 3) of another Diprotodon. 
Fig. 4. Front surface of the same tooth. 
All the figures are of the natural size. 
4 i 
MDCCCLXX. 
