No. 1.] ORIGIN OF HUMAN MONSTERS. 199 
The tissue elements of the embryo are for the most part well 
preserved. There is no evidence of extensive necrosis. Occa- 
sionally, where the clot of red and white corpuscles and fibrin 
becomes clearly intermingled with the villi of the chorion the 
syncytial cells stain imperfectly. The evidence of gross nec- 
rosis is entirely wanting. 
The blood-vessels of the chorion contain numerous leuco- 
cytes, constituting in some instances what appears to be leuco- 
cytic thrombi. One section was stained for bacteria, but none 
were found. 
The process as a whole is to be interpreted as an acute 
hemorrhagic inflammation of the embryonic structures. The 
large number of leucocytes undergoing fragmentation indi- 
cates that the inflammatory irritant was of a severe nature, 
and had acted with a considerable degree of intensity, as is 
not only shown by the rich immigration of leucocytes, but the 
severe retrogressive changes which they have undergone. 
No. 135. 
Ovum; 105 x 65x 65° mm-;, embryo, GC. R’, 9 mm. 
Dr. Mosely, Baltimore. 
The ovum was sent fresh to the laboratory and hardened in 
strong formalin. It is fairly smooth, its walls being thin and 
the villi are wanting. Upon opening it I found it filled com- 
pletely with a gelatin-like mass which is neither fibrous nor 
granular. Within this mass there is an atrophic embryo 
standing upon a thin umbilical cord. The entire chorion is 
Fic. 135a.—Embryo upon a mass of magma within the ccelom. One-half 
natural size. 
