The other boy in
the family had a total absence of irides, but he could see fairly
well with the left eye.
Anomalies of the Ears.--Bilateral absence of the external ears is
quite rare, although there is a species of sheep, native of
China, called the "Yungti," in which this anomaly is constant.
Bartholinus, Lycosthenes, Pare, Schenck, and Oberteuffer have
remarked on deficient external ears. Guys, the celebrated
Marseilles litterateur of the eighteenth century, was born with
only one ear. Chantreuil mentions obliteration of the external
auditory canal in the new-born. Bannofont reports a case of
congenital imperforation of the left auditory canal existing near
the tympanic membrane with total deafness in that ear. Lloyd
described a fetus showing absence of the external auditory meatus
on both sides. Munro reports a case of congenital absence of the
external auditory meatus of the right ear; and Richardson speaks
of congenital malformation of the external auditory apparatus of
the right side. There is an instance of absence of the auditory
canal with but partial loss of hearing. Mussey reports several
cases of congenitally deficient or absent aural appendages. One
case was that in which there was congenital absence of the
external auditory meatus of both ears without much impairment of
hearing.
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