232 MALL. [Vor. XIX. 
The specimen came to me in 95 per cent alcohol, and upon 
opening it a large amount of magma was found within the 
celom. Not finding the embryo, the whole specimen was 
stained, imbedded in paraffin and cut into serial sections 50 
microns thick. It happened that the embryo was cut into 
coronal sections, and those containing the embryo with the 
chorion attached to it were mounted. 
The form of the structures of the embryo is normal, 
only the tissue did not stain well, indicating that it had been 
dead for some time before the abortion. Over the back and 
tail of the embryo the amnion is closely adherent, but it is 
wanting over the head. Here it ends abruptly, and this could 
not be due to rough handling, for the embryo is well packed 
with magma up against the chorion. Over the embryo the 
chorion is very thin and without villi, which explains why the 
embryo was seen in the fresh specimen. At some distance 
from the embryo the chorion appears to be normal in struc- 
ture. 
No. 212. 
Embryo, ©) 9.5, mane 
Dr. West, Bellaire, Ohio. 
The macerated embryo is from a large ovum which was 
aborted October 9, 1902. Last menstrual period began on 
April 3, 189 days before the abortion. 
The tissues of the embryo show that its development was 
arrested during the sixth week. The central nervous system 
is completely dissociated, being but a mass of cells. The 
other tissues of the body, except those of the head, have under- 
gone no secondary changes. The face and the top of the 
head have been converted into a thickened mass of necrotic 
tissue, in which may be seen large veins filled with blood. 
The eyes are immediately below the skin, thoroughly disso- 
ciated, but the vesicular lenses can still be outlined. 
No. 215. 
Ovum, 45 x 40 x 40 mm.; embryo, C. R., 17 mm. 
Dr. Unger, Mercersburg, Pa. Brodel Collection. 
