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IOWA ACADEMY OF SCIENCE Vol. XXVIII, 1921 
most; the last ones that the animal would have acquired. He 
was well along in life, but not aged. The upper tooth measures 
13 1/4 inches by 8 inches by 3 1/2 inches and weighs a little over 
12 1/4 pounds. Its companion measures 14 inches by 6 1/4 
inches by 3 1/2 inches and weighs almost 12 pounds. All of these 
specimens are now in the Museum of Iowa Wesleyan College. 
Mr. J. H. Kephart has in his possession the enamel crown of 
a Mastodon tooth very much like that shown in figure 5a but about 
one-half inch smaller, which he found September, 1921, in Sugar 
creek northwest of Trenton in Section 33, Twp. 73 N, Range VII 
W. 
Iowa Wesleyan College 
Mount Pleasant, Iowa 
