274 MALL. [Vor. XIX. 
and fully one millimeter in diameter; there are also numerous 
vessels in the villi of the chorion. The tissue of the chorion 
is hyaline, with a diminished number of nuclei in it. 
Undoubtedly the foetus escaped in some way shortly before 
the abortion, the membranes and cord remaining some time, 
long enough to undergo these changes. The blood-vessels of 
the cord and chorion are empty, but well developed. 
No. 280. 
Mole) 40x25 3.25 0m: 
Dr. Magness, Baltimore. 
Within the mole, which is said to be five or six weeks old, 
Fic. 280.—Photograph of the mole. 1% times. 
there is an irregular cavity with smooth walls, measuring 
10x 5x 5 mm. Sections were cut of the thick hemorrhagic 
walls, which showed that the walls of the chorion are thin, 
with considerable reticular magma attached to them on the 
inside. No amnion was found. The villi are not very large, 
are well developed, contain remnants of blood-vessels and are 
covered with a mass of necrotic syncytium. The blood and 
mucus over the syncytium is filled with leucocytes, which 
invade the mesoderm of many of the villi. It is probable that 
the whole ovum has been dead for several weeks, the embryo 
and the amnion having been destroyed entirely. 
