234 MALL. [Vor. XTX. 
is very rich in villi, which at its rounded end is composed 
wholly of blood. The entire tumor is encapsulated with a 
layer of pus. Between the villi the meshes are filled with 
Fic. 223b—Diagram of the structure of the mole. B, blood and fibrin; 
P, pus; S, syncytium; NS, necrotic syncytium; V, villi. 
syncytium, which often give the picture of a cancer. Where 
the syncytial cells are far removed from the blood they are 
often necrotic. 
No. 226. 
Ovum, 60 x 60 x 30 mm.; embryo, C. R., 24 mm. 
Dr. West, Bellaire, Ohio. 
“The woman, mother of three children, menstruated last 
on March 3 and aborted on May 29.” The ovum is covered 
with a few large villi two mm. in diameter at their base, and 
irregular clots of blood. Elsewhere it is smooth. The amnion 
is filled with a granular mass, which was swept out easily 
when opened. Between the amnion and chorion there is an 
irregular mass of mother’s blood, which is partly organized, 
showing that the chorion had ruptured some time before the 
abortion took place. The tissues of the villi and the chorion 
are somewhat fibrous, with very few degenerated blood-ves- 
