326 MALL. [Vor. XIX. 
Fic. 339.—Photograph of the embryo. X 2 times. 
No. 339. 
Chorion;: 50°, 30: x 30min: embryo, Cy Rei, mn: 
Professor Minot, Boston. 
The chorion is thin, is covered by but few villi and is 
hemorrhagic on one end. In structure it is somewhat hya- 
line at points and at others somewhat fibrous. The cord is 
thickened and also fibrous. The walls of its blood-vessels are 
dissociated and the blood from them is infiltrating the sur- 
rounding tissues. The embryo is somewhat distorted but 
normal in form. Within the tissues are dissociated and 
macerated. The large blood-vessels are distended with blood, 
and within the liver and heart the blood cells from them have 
extended into the surrounding tissues. 
No. 340. 
Stumpy embryo, 6 mm. long. 
Professor Minot. 
The embryo is well infiltrated with round cells, and the dis- 
sociation of the tissues is quite complete. Large blood-vessels 
can still be outlined, and the central nervous system is prac- 
tically solid. 
