No. 1.] ORIGIN OF HUMAN MONSTERS. 259 
filled with a large amount of granular magma, in which is 
imbedded a necrotic embryo, 14 mm. long. 
The decidua is filled with small abscesses, the leucocytes 
invading the villi as well as the main walls of the chorion. 
The changes in the embryo are extreme, the nervous system 
being solid, filling up the stumpy head. The outlines of the 
organs are hazy, they being filled more or less with round 
cells. The embryo is falling into pieces; some of the ep1- 
dermis is still intact. 
No. 263d. 
Ovum, 27 mm. in diameter; embryo, C. R., 15 mm. 
Dr. Lyman, Baltimore. 
The villi are apparently normal in form and in structure. 
Possibly the mesoderm is a little fibrous. The blood-vessels 
appear to be normal. ‘The cord is dilated, showing the double 
enlargements, which are mucoid in structure. 
The brain and spinal cord are dissociated, with the brain 
protruding into the mouth, but the other organs are fairly 
= Fic. 263d a—Embryo within the ovum. X 2 times. 
