PLATE III. 



All figures three-fourths natural size. 

 Mastodon floridaims. 



Fig. i. First lower right true molar. Outer view. From same individual as fig. 2. 



Fig. 2. First lower left true molar. From same individual as fig. i. 



Fig. 3. Mastodon from Nicaragua. Anterior portion of a lower right true molar. 



Fig. 4. Mastodon Floridanus. Posterior portion of last lower left true molar. 



Fig. 5. Posterior portion of lower right second true molar. 



