ELEPHAS PRIMIGENIUS. 225 
described as the “ thick-plated” variety of Mammoth’s 
molar; yet, nevertheless, exhibited the characteristic supe- 
rior breadth, as compared with the Indian Elephant, in a 
corresponding molar of which species divided into nine 
plates, the length of the crown was three inches, and its 
breadth one inch. 
A third upper molar of the Mammoth from the drift at 
Hinton, Somersetshire, has the crown divided into twelve 
plates, and measures three inches, four lines in length, and 
one inch and a half in breadth. This would be precisely 
the size of the molar tooth of the young Mammoth, figured 
in Cuvier’s ‘ Ossemens Fossiles, pl. vi., Eléphans, fig. 4, if 
the figure be, as I suspect, half the size of nature. Ina 
corresponding upper molar of an Indian Elephant of 
equal breadth, but greater length than the preceding, 
I found eleven lamellar divisions of the crown; the more 
common number is twelve or thirteen.* 
The number of the coronal plates of the fourth grinder 
in the Indian Elephant is fifteen or sixteen ; the greatest 
number in the last molar developed, the seventh or eighth 
in succession, 1s, according to Mr. Corse, twenty-two or 
twenty-three. The number of the coronal plates is subject 
to greater variation in the Mammoth, and increases in a less 
regular ratio in each succeeding molar. The fourth molar 
of the upper jaw, with an antero-posterior extent of from 
seven to nine inches, varies in the number of its plates from 
twelve or sixteen. 
The fifth molar, with an antero-posterior diameter of 
from ten to eleven inches, may have from sixteen to nine- 
teen plates. 
The largest upper molar of the Mammoth which I 
* This tooth begins to appear above the gum at the end of the second year ; 
and is shed during the ninth year. 
+ Philos. Trans. 1799, p. 224. 
