EXPLANATION OF THE PLATES. 



PLATE I. 



Fig. 1. Bird's eye view of the front, or small upper grinder of the 

 right side of an American Mastodon, dug up in the town of 

 Hempstead, Rockland county, state of New- York, about 

 34 miles from the city of New- York. Length, 4 5-8 inches, 

 breadth, 3 1-8 inches. 



Fig. 2. Bird's eye view of a tooth dug up in Middletown, Monmouth 

 county, state of New-Jersey, about 26 miles from the city of 

 New- York. Length, 9 8-8 inches breadth, 3 1-8 inches. It 

 is supposed to be allied to the Asiatic Elephant. 



Fig. 3. Bird's eye view of a tooth found on the Eastern shore of Ma- 

 ryland. (From Dr. Hayden.) Length, 8 l-a inches greatest 

 breadth, 4 inches. It is supposed to be allied to the African 

 Elephant. 



Fig. 4. Side view of Figure 1, with the roots broken. 



Fig. 5. Side view of Figure 2.- Showing the internal part of the tooth, 

 the external lamina of bone having cracked off. The white 

 substance exposed in this view, was of the same friable nature 

 as that in the roots of Figure 1, and 4. Greatest depth, 8 1-2 

 inches. 



JFig. 6. Side view of Figure 3. Greatest depth, 9 &8 inches. 



