234 
Mr. Corse’s Observations on the 
In this and the preceding plate, the enamel and centre of 
each tooth appear higher than the divisions between the teeth. 
A. The condyle. 
B. The coronoid process. 
C. The apex of the alveolus. 
DDD. The section of the portion of the jaw bone and alveo- 
lus, which were removed to show the grinder in situ. 
EE. The division between the alveolus and jaw bone, where 
there is only a membranous attachment. 
FF. The spongy substance of the alveolus, which becomes 
thicker as it advances forward, and from which the alveolar 
processes shoot up between the roots of the teeth, in proportion 
as they are lengthened. 
GG. The grinding surface employed in masticating the food. 
HHH. Three anterior fangs, considerably lengthened, but 
still hollow. 
1 1. The bony lamella, or incipient roots of the posterior teeth. 
Tab. XII. 
Represents a grinder of the upper jaw, divided longitudinally, 
and its surface polished, to show the structure. The anterior 
fang is solid, almost to the extremity, and part is already ab- 
sorbed, where it appears rough and ulcerated. The hollow that 
formerly existed between the three next teeth and their roots 
is filled up ; and the ossification of the fangs to the bodies of 
the teeth, is seen proceeding regularly backwards. 
The roots of the four teeth farthest back are still very hollow. 
The centres of the four anterior ones are completely filled up ; 
and the progress of ossification is less complete as you go 
back. 
