170 _ MALL. [Vov. XIX. 
ened it was found to be of firm consistency and of a very red 
color, indicating that it must be pathological. Later, when it 
was cut in half, there was found within it a spherical cavity, 
20 mim. in diameter, lined with a smooth, fibrous membrane 
and filled with a clear fluid which permitted of a careful in- 
spection of its interior. On one side of the cavity there was 
a small elevation, one millimeter in diameter and one-fourth 
of a millimeter high. 
Sections were made of the walls of the specimen through 
the elevation which proved to be a fibrous thickening of the 
amnion at its junction with the chorion. There are no blood- 
vessels in any portion of the chorion. Between the villi there 
is a great quantity of syncytium, fresh blood and fragmented 
leucocytes. At many points the syncytium and leucocytes 
invade the chorion and the villi with the apparent intention 
of destroying them. Where fresh blood and syncytium come 
in contact there are many fragmented leucocytes present. 
No. 78. 
Ovum, 36 x 33 x 13 mm.; nodule within, 14.6 mm. 
Dr. A. P. Stoner, Harlan, Iowa. 
“The woman from whom the specimen was obtained men- 
struated last on December 1, 1896, and the abortion took 
place on February 26, 1897. The sac was perfectly smooth 
when it was passed, and, without opening, it was placed in 50 
per cent alcohol. After the abortion two or three pieces of 
Fic. 78a.—Photograph of ovum with piece of chorion and nodule lying 
on top of it. Natural size. 
