PROFESSOR OWEN ON THE FOSSIL MAMMALS OF AUSTRALIA. 



257 



PLATE XXXV. 



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). 



PLATE XXXVI. 



Fig. 1. Outside view of part of the right mandibular ramus and teeth, Phascolomys 



(Phascolonus) gig as. 

 Fig. 2. Inside view of part of left ramus and teeth of the same mandible. 

 Fig. 3. Working-surface of the right molars of the same mandible. 

 Fig. 4. Working-surface of the right mandibular ramus of a larger Phascolomys gigas. 



PLATE XXXVII. 



Fig. 1. Upper view of the lower jaw and teeth, Phascolomys {Phascolonus) gigas. 



Fig. 2. Anterior fractured surface of right ramus of the same jaw. 



Fig. 3. Posterior fractured surface of right ramus of the same jaw. 



Fig. 4. Posterior fractured surface of another mandibular ramus, Phascolomys gigas. 



PLATE XXXVIIL 



Fig. 1. Hind view of mandible, Phascolomys (Phascolonus) gigas. 

 Fig. 2. Hind view of mandible, Phascolomys latifrons. 

 Fig. 3. Portion of left mandibular ramu^ of a large Phascolomys gigas. 

 Fig. 4. Upper surface of the same fossil. 



Fig. 5. Portion of left mandibular ramus, Phascolomys parvus. 

 Fig. 6. Upper surface of the same fossil, 



PLATE XXXIX. 



Fig. 1. Upper surface of fore part of mandible, Phascolomys gigas. 



Fig. 2. Under surface of the same fossil. 



Fig. 3. Back view, showing roots of incisors [i') and anterior molars [d 3) of the same fossil. 



Fig. 4. Under surface of fore part of mandible, Phascolomys vombatus. 



MDCCCLXXII. 2 M 



