No. 1.] ORIGIN OF HUMAN MONSTERS. 273 
uterine glands. All in all, this specimen reminds one of 
Peters’s ovum very much. ‘There are some leucocytes in the 
decidua, but no accumulations of them, indicating inflamma- 
tion of the uterus. 
I consider this specimen one in which the embryo has been 
destroyed, leaving a normal chorion without an embryo. 
No. 279. 
Fleshy chorion, 100 x 60 x 60 mm. Into the cavity the 
umbilical cord, 30 x 5 mm., projects. 
Dr. Kemp, Baltimore. 
Part of the chorion is hemorrhagic; the rest appears nor- 
mal. Sections show that the villi are nearly normal, with a 
deficient amount of syncytium over them, even where they 
are well imbedded in blood. Within there is an amnion, and 
the worm-like process which proves to be the umbilical cord, 
with its three blood-vessels. The vessels are well developed 
Fic. 279.—Photograph of a section of the specimen showing the cavity 
and cord within. Slightly reduced. 
