Remains of M: mn ee Sc. 295 
county, about fifteen miles 
9° 27’ N. and longitud 
Iam not aware, tha 
before been discovered in this country north of Georgia and Vir- 
ginia.t The tooth was found in the gravelly bank of Salt Creek, 
a tributary of Whitéwater River, which flows into the Great Mi- 
ami River near its junction with the Ohio. It was uncovered by 
a freshet, which had washed away the alluvial bank so as to ex- 
mire the tooth to view. 
Dimensions.—Length, 13 inches; greatest depth, 6 tat ; 
width of grinding surface, 34 inched length of grinding surface, 
6 inches; width at the bottom of socket, 3 inches. 
Its weight is now eleven pounds and four ounces; when first 
found, and previous to being dried, it weighed fourteen pounds. 
Seven inches of the face or crown of the tooth, had not grown or 
protruded beyond the gum or jaw, so that but six inches had, at 
the death of the animal, ever been used in mastication. Wheth- 
er the remaining seven inches would have grown longer, or 
whether this tooth belonged to the front or the back part of the 
jaw and was naturally imperfect in this respect, I am unable to 
determine. From front to rear, it has considerable lateral curva- 
ture, diverging at the centre, one inch fromaright line. 
he “‘erusta petrosa” still possesses considerable hardness, but 
in many places has scaled off. Those “ wedges” as Dr. Buckland 
calls them, which had not appeared above the jaw, upon the out- 
Side of the tooth, have much the appearance of ribs in a skeleton, 
hot being so thickly covered with the “ crusta” as the rest of the 
tooth. The lower ends of the “ wedges” or fangs stand separate 
from each other about half an inch, and form transverse rows of 
tounded flattish points or partitions finished off with ivory, and 
exceedingly smooth and highly polished, except those which 
have not grown beyond the jaw, these being hollow at the ends 
and bringing to view the enamel of the “ wedge.” The tooth is 
not so deep at the ends as in the middle, the ends of the roots 
forming nearly a segment of acircle. The parts of those “‘ wedg- 
€s” which had not finished their growth, present nearly sharp 
Points of enamel, each wedge branching and forming three sev- 
Raises about 8° 
é iets trap ascertained, but estimated by the maps and the distance from 
incin 
: i The ae Treatise and Hitchcock’s Geology are the only authorities at 
and, 
