XIII 



PHYLUM CHORDATA 



531 



are all more or less carnivorous, the incisors are numerous and sub- 

 equal and the canines large. There are typically three pre-molars 



FIG. 1119. Teeth of Great Kangaroo ^(Macropus major)} r (Aiter Owen.) 



FIG. 1120. Front view of the skull of Tasmanian Devil (Sarcophilus ursinus), showing 

 j polyprotodont and carnivorous dentition. (After Flower.) 



FIG. 1121. Teeth of upper jaw of Opossum (Diddphys marsupialis), all of which are 

 unchanged except the last premolar, the place of which is occupied in the young animal by 

 a molarLform tooth represented in the figure below the line of the other teeth. (After Flower 

 and Lydekker.) 



and four molars. A good example of the diprotodont arrangement is 

 theKangaroo(Macropus) (Fig. 11 19), which has the dental formula 

 .312 4T 



* r c ' 6'*' 2' m - 4 = 34 



M M 2 



