No. 1.] ORIGIN OF HUMAN MONSTERS. 327 
Fic. 340—Sagittal section of the embryo. X 17 times. 
No. 341. 
Ovum, 70 x 60 x 50 mm.; embryo, 14 mm. 
Professor Minot. 
The ovum is pear-shaped and smooth, being covered with 
some decidua and at points with hemorrhagic masses. Its 
tissue does not stain well, but it appears as if some of the villi 
were fibrous and others cedematous. There is not much syn- 
cytium present. Possibly there are masses of leucocytes in 
the decidua. 
Within there are two stumpy embryos, both of which have 
dilated cords which come to a point where they are attached 
