PEDIGREE OF THE EDENTATES 



Armadillo 



LIVING 



PLEISTOCENE * 



PLIOCENE 



MIOCENE 



OLIGOCENE 



EOCENE 



The Edentates are a peculiarly South American group of quadrupeds. They evolved In that 

 continent during the Age of Mammals from small ancestors into a great variety of widely different 

 animals some of huge size. The progressive steps in their evolution and divergence can be traced 

 in the successive geologic formations. The lines of the diagram represent their genealogy and rela- 

 tionships, dotted where questionable, drawn in full when reasonably certain. The outime sketches 

 represent a few of the better-known forms, all drawn to the same scale of size; the crosses represent 

 other stages in the evolution of each race that have been found as fossils in each epoch 



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