No. 1.] ORIGIN OF HUMAN MONSTERS. 221 
No. 195. 
Ovum, 30 x 30 x 30 mm. 
Dr. D. S. Lamb, Washington. 
No embryo could be found, although the entire ovum was 
cut into sections. The specimen is well covered with villi 
and contains some retictlar magma. The mesoderm of the 
chorion and villi appears normal and is rich in blood-vessels 
filled with embryo’s blood. 
No. 196. 
Tubal pregnancy; embryo, 2.5 mm. long. 
Professor Brodel, Baltimore. 
The specimen, hardened in formalin, contained two sus- 
picious bodies which were both cut into serial sections. One 
of these proved to be the embryo greatly deformed, repre- 
senting a stage about three weeks old. The tissues of the 
embryo are quite homogeneous, only the central nervous sys- 
tem being recognizable. One eye and a large blood-vessel can 
Fic. 196.—Tube cut open, showing the embryo. From a sketch by Pro- 
fessor Brédel. 
still be faintly outlined. At points the amnion and umbilical 
vesicle are blended completely with the chorion. 
The outside of the chorion has attached to it a few long 
and thick villi which do not branch. The chorion and these 
villi are covered with a layer of syncytium of unequal thick- 
