No. 1.] ORIGIN OF HUMAN MONSTERS. 323 
“Last period four weeks ago. About ten days ago some 
bleeding, which repeated itself at intervals, and was finally 
followed by the abortion.” 
Examination of the mass proves that it is made up mostly 
of uterine mucous membrane, decidua, blood and pus, and 
contains a cavity 15 mm. in diameter. The chorion can still 
be made out as a fibrous band, infiltrated on the outside with 
leucocytes, and on the inside with small masses of syncytial 
cells. At points the chorion forms branches, which ramify 
partly through the mole. These are accompanied with syn- 
cytial cells and leucocytes. 
The embryo is pretty well destroyed, of the five-weeks 
stage, and infiltrated with round cells. The head and back 
have fallen off, leaving only the viscera attached to the um- 
bilical cord. 
No. 336. 
Ovum, 35 X 25 x 15 mm.; embryo, 8 mm. 
Dr. West, Bellaire, Ohio. 
The ovum is smooth, one end being covered with well- 
developed villi. Their mesoderm is hyaline, with scattered 
nuclei containing some remains of blood-vessels. The main 
wall of the chorion is fibrous and infiltrated with blood-cells 
from the embryo. Within there is a cavity (15 x Io mm.) 
filled with granular magma and containing the umbilical 
vesicle and the embryo, which is closely encircled by the 
amnion. 
The embryo is somewhat distorted, with large blood-vessels 
filled with blood and tissues infiltrated with rounds cells. The 
muscle wall of the ventricle of the heart is normal in appear- 
ance and there is every evidence that it kept beating until the 
last. What is especially noteworthy is that the circulation 
with the chorion has been cut off, the cord being atrophic and 
infiltrated, but instead the large omphelo-mesenteric vessels 
are filled with blood and spread over the yolk sac. The walls 
of this, however, are necrotic. 
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