16 
W. L. WILLIAMS. 
1 
the left side—owing doubtless to pain induced by pressure on 
the two affected molars, and consequent mastication of food 
on the right side only—had become worn wedge-shaped, so that 
the superior passed down outside of the inferior teeth, the 
two rows closing together like shears, the beveled sides com¬ 
ing in contact instead of the tables. Beyond this deformity, 
which was uniform with all the left teeth, no abnormality 
could be detected by an oral examination, and hence no means 
were so offered distinguishing the diseased from the healthy 
teeth. 
Free openings were made over the region of both the 
fourth inferior and superior left molars, and the affected teeth, 
which were now plainly recognizable by the touch, were 
driven out with punch and mallet, the accumulated pus 
and detached dental tissue were carefully removed, the pus- 
cavities thoroughly cleansed and dressed antiseptically. The 
recovery from the operation on the inferior maxilla was 
prompt and complete, while that of the superior was tardy, 
the alveolus having been seriously injured in driving through 
it the greatly enlarged irregular fang of the affected tooth 
(Fig. 6) which left an opening requiring several months for 
healing. 
The deformity of the remaining teeth was so great that it 
could not be overcome, but the recovery was sufficiently com¬ 
plete that the mare has since maintained good health and 
flesh while doing ordinary farm work and breeding, while the 
external blemish is quite insignificant. 
Under class C, Aberrations of the Papilla, the only sub¬ 
class, Radicular Odontomes, is well illustrated in Figs 8, 9, 
10, 12 and 13, three of which offer something of special inter¬ 
est. 
Fig. 13# represents the fourth superior molar from an aged 
pony whose history could not be traced, but had doubtless 
had a fistulous opening over the tooth-fang for several years. 
Not fully realizing the extent of the disease, a free opening 
was made to the bottom of the fistula, and the rough, carious 
portions as carefully removed as possible ; but this proved of 
no avail and later the tooth was extracted by trephining and 
