177 



108.— Tooth of Mylodon. 



109.— Tooth of Mylodon. 



107, the external view of the right branch of the lower 

 jaw of mylodon. Figs. 108 and 109, the simple teeth 

 of mylodon, showing the depth of their implantation. 

 The cavity at the base of the tooth is seen at «, Fig. 



108. As in the sloth, the megatherium, and megalonyx, 

 these teeth, formed for crushing leaves, are composed of 

 a central pillar of coarse ivory, immediately invested 

 with a thin layer of fine dense ivory, and the whole sur- 

 rounded with a thick coating of cement. 



From the structure of these teeth it is evident that the 



