No. 1.] ORIGIN OF HUMAN MONSTERS, 315 
Between the villi there are great masses of necrotic syn- 
cytial cells. There is more or less blood between the villi and 
occasionally small masses of leucocytes may be seen. A few 
of the villi are being invaded by their epithelial coverings. 
No. 324. 
Ovum, hemorrhagic and fleshy, 45 x 45 X 22 mm.,; embryo, 
rounded and 3% mm. long. 
Professor Brédel, Baltimore. 
The walls of the chorion are thin and fibrous and are lined 
by the amnion. The villi are few in number, fibrous, devoid 
of syncytium and imbedded in a large quantity of blood. Un- 
fortunately the embryo was lost while being imbedded, but 
the excellent drawing of it tells pretty well that its tissues and 
organs are markedly changed and deformed. 
No. 325. 
Ovum, 55 x 55 x 35 mm.; embryo, CeRee73 mim: 
Dr. Ballard, Baltimore. 
“The specimen was obtained from the same woman that 
gave No. 308. Last menstrual period, September 15; abor- 
tion, November 27, 1905. Periods regular monthly.”” The 
specimen was clean, well covered with villi and well hardened 
‘n formalin. The amnion and ccelom are filled with magma 
reticulé, in which is embedded the trunk of an embryo at- 
tached to the chorion by a thin cord. On the opposite side of 
the ovum the head is located, also imbedded in magma. Over 
the body of the embryo there is a greenish-colored nodule 
4 mm. in diameter, which proved to be the degenerated um- 
bilical vesicle. The legs are poorly formed and stubby. 
Sections of the chorion show that the mseoderm of the villi 
is hyaline, in which remnants of blood-vessels may be seen, 
with a normal number of round nuclei scattered through ite 
The syncytium also appears to be normal. Between the villi 
some mucus may be seen, in which there are leucocytes. No 
decidua is attached to the villi. 
The cord is thin at its attachment to the chorion, and it is 
slightly enlarged midway between the chorion and the em- 
