354 



Fig. 3. Left side view of the same fossil. 



Fig. 4. Plight side of fore part of the same fossil. 



Fig. 5. Front view of premaxillary part of the same fossil. 



Pig. C. Fractured surface of ditto, showing transverse section of the implanted part of 

 the incisors, 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 LVIII. 



Fig. 1. Base of skull and working-surface of the teeth of the upper jaw, Phascolomys 

 platyrhinus. 



Fig. 2. Part of base of skull, with fractured and working-surface of some molar teeth, 



Phascolomys medius. 

 Fig. 3. Left side view of the same fossil. 

 Fig. 4. Posterior fractured end of the same fossil. 



Fig. 5. Front view of premaxillaries and fractured incisors of the same fossil. 

 Fig. 6. Inner side view of exposed part of the three anterior molars and fore lobe of the 

 fourth molar of the same fossil. 



PLATE LIX. 



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, i, t, of 



the same fossil. 

 Fig. 5. Hind fractured end of left ramus of the same fossil. 



PLATE LX. 



Fig. 1. Under view of part of upper jaw and molar teeth, Phascolomys magnus. 



Fig. 2. Left side view of the same fossil. 



Fig. 3. Inner side view of the right molars of the same fossil. 



Fig. 4. Upper view of the same fossil. 



Fig. 5. Anterior fractured surface of the same fossil, with sections of the base of the 

 incisors, ?', i. 



Fig. 6. Third molar and hind half of second molar, Phascolomys magnus : the working- 

 surface is shown below. 

 Fig. 7. Part of upper jaw, with molar teeth, Phascolomys medius (from a photograph). 



