No. 1.] ORIGIN OF HUMAN MONSTERS. 237 
Fic. 228a.—Photograph of the ovum. Natural size. 
The solid blood-red specimen contains a regular cavity, 
30 x 18 x 18 mm., which is filled with a granular magma, 
on one side of which is attached an embryo shaped like an 
hour-glass. 
Sections of the mole show that it is composed of thick 
walls in which there is much blood, villi, a great deal of 
decidua and some pus, especially on its outside. The meso- 
derm of the villi and chorion is very fibrous and devoid of 
blood-vessels. 
Fic. 228b.—Diagrammatic section of the embryo. X 20 times. 
