90 



MAMMALIAN DENTITION 



Potorous : 



l|,O^,Pj,M|.total30. 



3 1 1 

 Dendrolagus : I — , C — , P — 



M-i total 30. 



Maeropus : 



l|, C^,Pj,m|. total 28, 



The progressive elongation and Ungulate-like appearance of 

 the jaws should be noted. The condyle is raised above the 

 molars thus entailing lengthening of the mandibular ramus 

 and narrowing of the coronoid process. 



Still another animal must be included in the study of the 



Fig. 28. — Dentition of Tasmanian Wombat (Phascolomys ursinus, 9.222-5). This animal 

 is the only gnawing type among the Marsupials. 



adaptations of the marsupial dentition, namely, Phascolomys 

 ursinus, the Tasmanian Wombat (Fig. 28). It is a herbivorous 

 animal but its dentition has taken on a gnawing character like 

 that of the most specialized placental Rodents. It is a noc- 

 turnal burrowing creature about as large as a badger but more 

 thickly set and feeds upon grass, other herbage and roots. 

 The tooth formula is: 



