dentaire de Paris" there are
several milk-teeth, both of the superior and inferior maxilla, which
are fused together. Bloch cites a case in which there were two rows of
teeth in the superior maxilla. Hellwig has observed three rows of
teeth, and the Ephemerides contain an account of a similar anomaly.

Extraoral Dentition.--Probably the most curious anomaly of teeth is
that in which they are found in other than normal positions. Albinus
speaks of teeth in the nose and orbit; Borellus, in the palate;
Fabricius Hildanus, under the tongue; Schenck, from the palate; and
there are many similar modern records. Heister in 1743 wrote a
dissertation on extraoral teeth. The following is a recent quotation:--

"In the Norsk Magazin fur Laegevidenskaben, January, 1895, it is
reported that Dr. Dave, at a meeting of the Medical Society in
Christiania, showed a tooth removed from the nose of a woman aged
fifty-three. The patient had consulted him for ear-trouble, and the
tooth was found accidentally during the routine examination. It was
easily removed, having been situated in a small depression at the
junction of the floor and external wall of the nasal cavity, 22 mm.
from the external nares. This patient had all her teeth; they were
placed somewhat far from each other. The tooth resembled a milk canine;
the end of the imperfect root was covered with a fold of mucous
membrane, with stratified epithelium. The speaker suggested that part
of the mucous membrane of the mouth with its tooth-germ had become
impacted between the superior and premaxillary bones and thus cut off
from the cavity of the mouth. Another speaker criticised this fetal
dislocation and believed it to be due to an inversion--a development in
the wrong direction--by which the tooth had grown upward into the nose.
The same speaker also pointed out that the stratified epithelium of the
mucous membrane did not prove a connection with the cavity of the
mouth, as it is known that cylindric epithelium-cells after irritative
processes are replaced by flat ones."

Delpech saw a young man in 1829 who had an opening in the palatine
vault occasioned by the extraction of a tooth. This opening
communicated with the nasal fossa by a fracture of the palatine and
maxillary bones; the employment of an obturator was necessary. It is
not rare to see teeth, generally canine, make their eruption from the
vault of the palate; and these teeth are not generally supernumerary,
but examp