No. 1.] ORIGIN OF HUMAN MONSTERS. 159 
of the cord is infiltrated with cells, in addition to the nu- 
cleated cells of the cord, and it has very ragged edges. It 
appears as if the embryo had gradually fallen off, piece by 
piece, leaving the ragged stump of a cord. The blood-vessels 
of the cord are but sparsely filled with blood. At the base of 
the cord there is a remnant of the umbilical duct. Apparently 
the chorion is normal. 
No. 29. 
Chorion, 30 mm. in diameter. 
Dr. W. D. Booker, Baltimore. 
The ovum is covered with but few atrophic villi, and within 
no trace of an embryo can be found. The ccelom is filled with 
a cheesy mass or granular magma, like that usually found 
within the amnion of pathological embryos. After the magnia 
had been searched through most completely, the portions of 
the chorion which might have a remnant of an embryo at- 
tached were stained and cut into serial sections, but nothing 
whatever could be found. 
Sections of the chorion show that its walls and villi are 
fibrous and thickened. There is no amnion present. The syn- 
cytial layer is very extensive over the villi and chorion, in- 
vading them at points. Immediately over the syncytium of 
the villi, and occasionally between them, there is a gelatinous 
envelope, which at times appears fibrinous. Within this en- 
velope there are many leucocytes with fragmented nuclei. 
No. 30. 
Embryo, C. R., 60 mm. 
From Dr. Snively, Waynesboro, Pa. 
The woman from whom it was obtained is colored, and — 
menstruated last from April 5 to 12. On June 19 she had 
her first pains, which continued until the 21st, when the abor- 
tion occurred, i. ¢., 77 days after the beginning of the last 
period. 
The specimen is apparently normal with the exception of a 
hernia of the liver into the umbilical cord. The communica- 
