4o6 
EASTERN ETHIOPIA 
XXXII 
In these circumstances, the tooth continuing to grow in 
a circle, its point will sometimes re-enter the jaw, 
penetrate its own pulp chamber, and form a com¬ 
plete ring of ivory. I have seen several canines 
from hippopotamuses wTich have formed two-fifths of 
The hippopotamus is an ugly and apparently awkward brute, but it 
can make its way up a steep bank with remarkable quickness. 
a circle and one which is a complete ring, the growung 
point and the root being in actual contact. It is 
difficult to imagine the agony associated with such 
an untoward condition. The tusks of boars are liable to 
a similar abnormal growth, and among savage races 
of men such circular teeth are worn as charms. I have 
