red in the hospital of his city on February 26, 1806, of two
children, one black and the other a mulatto. She had been pregnant
eight months, and had had intercourse with a negro twice about her
fourth month of pregnancy, though living with the white man who first
impregnated her. Two placentae were expelled some time after the twins,
and showed a membranous junction. The children died shortly after birth.

Pregnancy often takes place in a unicorn or bicorn uterus, leading to
similar anomalous conditions. Galle, Hoffman, Massen, and Sanger give
interesting accounts of this occurrence, and Ross relates an instance
of triple pregnancy in a double uterus. Cleveland describes a
discharge of an anomalous deciduous membrane during pregnancy which was
probably from the unimpregnated half of a double uterus.

CHAPTER II.

PRENATAL ANOMALIES.

Extrauterine Pregnancy.--In the consideration of prenatal anomalies,
the first to be discussed will be those of extrauterine pregnancy. This
abnormalism has been known almost as long as there has been any real
knowledge of obstetrics. In the writings of Albucasis, during the
eleventh century, extrauterine pregnancy is discussed, and later the
works of N. Polinus and Cordseus, about the sixteenth century, speak of
it; in the case of Cordseus the fetus was converted into a lithopedion
and carried in the abdomen twenty-eight years. Horstius in the
sixteenth century relates the history of a woman who conceived for the
third time in March, 1547, and in 1563 the remains of the fetus were
still in the abdomen.

Israel Spach, in an extensive gynecologic work published in 1557,
figures a lithopedion drawn in situ in the case of a woman with her
belly laid open. He dedicated to this calcified fetus, which he
regarded as a reversion, the following curious epigram, in allusion to
the classical myth that after the flood the world was repopulated by
the two survivors, Deucalion and Pyrrha, who walked over the earth and
cast stones behind them, which, on striking the ground, became people.
Roughly translated from the Latin, this epigram read as follows:
"Deucalion cast stones behind him and thus fashioned our tender race
from the hard marble. How comes it that nowadays, by a reversal of
things, the tender body of a little babe has limbs nearer akin to
stone?" Many of the older writers mention this form of fetation as a
curiosity, but offer no explanation as to its cause. Mauriceau and de
Graaf