CHAPTER XXXW- 
THE EDENTATES,—Order EDENTATA. 
THe Mammals described in this chapter, which include the sloths, ant-eaters, and 
armadillos of South America, together with two Old World groups, are collectively 
characterised by the total absence of front teeth, while in a few instances their 
jaws are entirely toothless. Strictly speaking, therefore, the title of the group 
applies only to those of its representatives as present the latter feature; but if we 


= ALZY LVI CAS 
SELEZ 
MARS 
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THE GREAT ANT-EATER. 
regard the term as indicating the absence of front teeth alone, it will be applicable 
to the whole group, so far as existing forms are concerned. 
In addition to this absence of front or incisor teeth, the Edentates are also 
characterised by the simple structure of their cheek-teeth, which are composed 
solely of ivory and cement, without any trace of enamel. Moreover, these teeth 
never form distinct roots, but grow continuously throughout life, and have their 
pulp-cavities open inferiorly. Then, again, these animals usually lack a functional 
series of milk-teeth ; although in two instances such teeth are developed, which in 
one case cut the gums and come into use. 
