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PROFESSOR OWEN ON THE FOSSIL MAMMALS OF AUSTRALIA. 
Explanation of the Plates. 
PLATE XXXII. 
Fig. 1. Base of skull and working-surface of the teeth of the upper jaw, Phascolomys 
latifrons. 
Fig. 2. Part of base of skull, with working-surface of some molar teeth, Phascolomys 
medius. 
Fig. 3. Left side view of the same fossil. 
Fig. 4. Eight side of fore part of the same fossil. 
Fig. 5. Front view of premaxillary part of the same fossil. 
Fig. 6. Fractured surface of ditto, showing transverse section of the implanted part of 
the incisors, i, i. 
Fig. 7. Inner side view of the crowns of the three anterior molars and fore lobe of the 
fourth molar of the same fossil. 
PLATE XXXIII. 
Base of skull and working-surface of the teeth of the upper jaw, Phascolomys 
platyrhinus. 
Part of base of skull, with fractured and working-surface of some molar teeth, 
Phascolomys medius. 
Left side view of the same fossil. 
Posterior fractured end of the same fossil. 
Front view of premaxillaries and fractured incisors of the same fossil. 
Inner side view of exposed part of the three anterior molars and fore lobe of the 
fourth molar of the same fossil. 
PLATE XXXIV. 
Fig. 1. Outside view of portion of right mandibular ramus, Phascolomys medius. 
Fig. 2. Inner side view of the same fossil. 
Fig. 3. Upper view and grinding-surface of molar teeth of a mutilated mandible of 
Phascolomys medius. 
Fig. 4. Front fractured end, with section of implanted part of the lower incisors of the 
same fossil. 
Fin. 5. Hind fractured end of left ramus of the same fossil. 
O 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
