THE TEETH OF PROBOSCIDEA. 



355 



fifth sixteen, the sixth from twenty-four to twenty-seven- 

 In the African elephant, in which the individual plates are 

 much broader, they are fewer in number (see page 361). 



FIG. 151 



10 flak Size. 



A reference to the accompanying figure will indicate how 

 the succession takes place. The tooth in reserve occupies a 

 position at an angle to that in use ; as it moves forwards 



(*) Side view of skull of young Indian Elephant. The teetli in use are 

 the second and third of the molars which displace one another from be- 

 hind forwards ; the anterior of these, corresponding to a milk molar in 

 other animals, is nearly worn out ; the residual fragment is separately re- 

 presented on the left. The tusk, of which only a short piece can be 

 shown, is indicated within the socket by dotted lines, by which also the 

 form of the pulp cavity is mapped out. 



A A 2 



