No. 1.] ORIGIN OF HUMAN MONSTERS. 235 
sels within them, indicating that the circulation had ceased 
some time before the abortion; which is confirmed by a study 
of the embryo. 
The external form of the embryo indicates that it was 
nearly 50 days old when it died, for, with the exception of 
the head, its form is practically normal. The menstrual his- 
tory makes it 87 days, and if 28 is subtracted, ten days are 
still left, which is time enough in which to bring on the 
internal changes found within it. 
In general the organs are sharply defined, but they do not 
stain well; the cells appear as in coagulation necrosis. The 
Fic. 226a.—Photograph of the embryo. Enlarged 2 diameters. 
cartilages are also well formed, and the maxilla, mandible, 
clavicle, humerus, ulna, radius, femur and tibia have begun 
to ossify. All this indicates that this embryo died quite 
suddenly and that the changes within it are to be viewed as 
post-mortem changes. 
The vascular system is well developed, the heart muscle 
being normal in shape but very fibrillar; it does not stain 
well. Most of the large vessels are empty and the blood 
cells are scattered throughout the tissues of the ernbryo and 
the cord. The muscle fibers are unusually well marked, and 
the connective tissue seems to be thickened. 
