224 Mr. Corse’s Observations on the 
second set of grinders make their appearance, as I could never 
get an elephant to open his mouth in such a manner as to per- 
mit me to examine his teeth accurately; but, when the elephant 
is about two years old, the second set are completely in use. 
At this period, the third set begin to cut the gum. From 
the end of the second to the beginning of the sixth year, the 
third set come gradually forward, as the jaw lengthens, not 
only to fill up this additional space, but also to supply the place 
of the second set, which are, during the same period, gradually 
worn away, and their fangs absorbed. 
From the beginning of the sixth to the end of the ninth 
year, the fourth set of grinders come forward, to supply the 
gradual waste of the third set. 
After this period, several other sets are produced. In what 
time these succeeding grinders come forward, in proportion to 
their predecessors, I have not been able to ascertain ; but, from 
the data already given, I conclude, that every succeeding grinder 
takes at least a year more than its predecessor to be completed ; 
consequently, that the fifth, sixth, seventh, and eighth set of 
grinders (a further succession I have not been able to trace) 
will take from five to eight years, (and probably much longer,) 
each set, before the posterior lamina has cut the gum. 
The milk grinders consist each of four teeth or laminae ; the 
second set of grinders of eight or nine laminae ; the third set of 
twelve or thirteen; (Tab. VI. Fig. 1.) the fourth set of fifteen; 
and so on, to the seventh or eighth set, when each grinder con- 
sists of twenty-two or twenty-three, (Tab. X. and XI.) which 
is the greatest number I have observed. 
All these circumstances considered, I may venture to affirm, 
that the formation of the teeth and mode of dentition, in the 
