XITI 



riTYLUM CHORD ATA 



r>n?. 



largo ami prominent, tlio rest of the incisors and the canines being 

 smaller or absent. On the other liarul, in the polyprotodout forms 



Fic. nSS.— Teeth of Great Kangaroo (Kacropwi major). (After Owen.) 



Fig. IISO.— Front view of the skull of Tasmanian Devil (Sarcopldlus ursinus), showing 

 polypi-otodont and carnivorous dentition. (After Flower.) 



Fig. IIPO. —Teeth of upper jaw of Opossum (Didelph>/s marsicpialis), in all of which there 

 is no succession except in the last pre-niolar, the place of which is occupied in the young 

 animal by a molariform tooth represented in the figure below the line of the other teeth. 

 (After Flower and Lydekker.) 



(Figs. 1189, 1190). which are all more or less carnivorous, the 

 incisors are numerous and sub-equal and the canines large. There 

 are typically three pre-molars and four molars. A good example 



