ith intrauterine or extrauterine
life; but the associated anomalies (e.g., atresia ani) may be sources
of danger. If not noticed at birth, it is not usually discovered till
adult life, and even then the discovery is commonly accidental.

3. With regard to the functions of the pelvic viscera, urine may be
passed by both penises, by one only, or by neither. In the last
instance it finds exit by an aperture in the perineum. There is reason
to believe that semen may be passed in the same way; but in most of the
recorded cases there has been sterility, if not inability to perform
the sexual act.

4. All the degrees of duplication have been met with, from a fissure of
the glans penis to the presence of two distinct penises inserted at
some distance from each other in the inguinal regions.

5. The two penises are usually somewhat defective as regards prepuce,
urethra, etc.; they may lie side by side, or more rarely may be
situated anteroposteriorly; they may be equal in size, or less commonly
one is distinctly larger than the other; and one or both may be
perforate or imperforate.

6. The scrotum may be normal or split; the testicles, commonly two in
number, may be normal or atrophic, descended or undescended; the
prostate may be normal or imperfectly developed, as may also the vasa
deferentia and vesiculae seminales.

7. The commonly associated defects are: More or less completely septate
bladder, atresia ani, or more rarely double anus, double urethra,
increased breadth of the bony pelvis with defect of the symphysis
pubis, and possibly duplication of the lower end of the spine, and
hernia of some of the abdominal contents into a perineal pouch. Much
more rarely, duplication of the heart, lungs, stomach, and kidneys has
been noted, and the lower limbs may be shorter than normal.

CLASS XI.--Cases of fetus in fetu, those strange instances in which one
might almost say that a man may be pregnant with his brother or sister,
or in which an infant may carry its twin without the fact being
apparent, will next be discussed. The older cases were cited as being
only a repetition of the process by which Eve was born of Adam. Figure
63 represents an old engraving showing the birth of Eve. Bartholinus,
the Ephemerides, Otto, Paullini, Schurig, and Plot speak of instances
of fetus in fetu. Ruysch describes a tumor contained in the abdomen of
a man which was composed of hair, molar teeth, and other evidences of a
fetus. Huxham repo