Mr. Corse's Observations on the 
232 
The fluted appearance of the grinder, and also the plaited 
form of the enamel of each tooth, are distinctly seen. 
AAAA. The divided surface of the portion of bone that was 
removed, to show the apex of the bony case of the grinders, 
and incipient alveolus of the fifth grinder. 
BB. The alveolus, as far as it is unconnected with the jaw. 
C. A small portion of the jaw bone, adhering inseparably to 
the alveolus. 
D. The incipient alveolus. 
E. The canal of communication between the alveoli. 
FF. The uneven surface of the grinder. 
GG. The fluted appearance of the grinder, by the junction 
of the different teeth of which it is composed. 
HH. The canal for the transmission of the blood-vessels and 
nerves which supply the teeth and lower jaw. 
Tab. X. 
Represents the seventh or eighth succeeding grinder, in the 
left side of the upper jaw of an elephant, in the completest state 
possible, though on a small scale, about half the natural size. 
The two anterior teeth are quite worn down to the fangs ; and 
the three farthest back are not so far advanced as to adhere to 
the teeth immediately before them. The denticuli of which the 
teeth appear to be formed, are larger than in young elephants. 
This grinder consists of twenty-three teeth. The anterior 
one is worn away ; twelve are in use ; and ten remain to come 
through the gum. The dark margin, round the grinding surface, 
shows where the mm was attached : it is also seen in Tab. VII. 
O 
By drawing lines parallel to the grinding surface of the teeth 
in the upper jaw, it will appear, that several of the anterior 
