208 MALL. [Vo.. XIX. 
of only one layer of cells on one side of the vesicle, while on 
the opposite side it has a second layer or mesoderm, .5 mm. 
thick, in which are imbedded numerous blood-vessels filled 
with blood. There are a few blood-vessels filled with blood 
in the chorion in the immediate neighborhood of the vesicle. 
No. 150. 
Ovum, 35 x 30 x 10 mm.;-embryo, 5 mm. 
Dr. Oertel, Augusta, Ga. 
There are but few villi on the chorion. The embryo is 
distorted and the arm on one side is unusually large. 
The sections of the embryo show an extreme degree of 
pathological change. The nervous system is swollen and 
solid, and the contour of the viscera is wholly obliterated. 
The large blood-vessels are greatly distended with blood. 
Round cells are distributed equally throughout the body of 
the embryo. 
No. 152. 
Ovum, .70 x 422 38m: -embryo~eG ke, 21 am 
Dr. H. J. Boldt, New York. 
“The specimen is from a woman suffering with endo- 
metritis, this being her third successive abortion, which took 
place in each instance during the third month of pregnancy. 
The beginning of the last period preceding this abortion took 
place on April 16; conception April 20 (?); and abortion 
June 25, 180057 
When the specimen came into my hands the chorion was 
found to be smooth and apparently free from villi. The 
cavity of the amnion is filled with a mass of granular magma 
covering entirely an embryo over two months old. The um- 
bilical cord is much twisted and thin, measuring .5 mm. in 
diameter. The embryo was cut into serial sections and dif- 
ferent portions of the chorion were also examined. 
Microscopic examination shows that the chorion and am- 
nion are fibrous. The villi of the chorion are matted together 
with fibrin and a mass of cells, which have undergone hyaline 
