296 



ARTHUR WILLIAM MEYER. 



which measured 36 x 25 x 13 mm. was collapsed, free from the 

 uterus, and imbedded in coagulum. The only content of this 

 chorionic vesicle was a dark grayish coagulum which contained 

 no remnant of the embryo or of the amnion. This almost amor- 

 phous so-called magma included only a few isolated cells. In 



- *# 



FIG. 6. Section through the isolated empty conceptus and the adjacent decidua 



of No. 1224. 



spite of this fact the trophoblast, which had markedly prolifer- 

 ated, was well preserved over large areas, and many of the vessels 

 in the chorionic membrane were filled completely with erythro- 

 blasts. A few degenerate masses of trophoblasts and fused 

 degenerate villi also are present. Some villi show evidences of 



