244 MALL. [Vor. XIX. 
The sections show that the amnion is attached along most 
of the ventral side of the embryo, somewhat as it is in the 
normal specimen at the end of the second week. ‘The central 
nervous system is still quite sharply defined, being more char- 
acteristic in the head than in the trunk. The heart is com- 
posed of a solid mass of cells in front of the embryo, which 
extends as a horn-like process to the head. Between the heart 
and the body there is large group of epithelial cells, in which 
there are scattered some small round cells, probably the rem- 
nant of the liver. Otherwise the tissue of the embryo is of even 
structure with an occasional necrotic area. The epidermis is 
mostly wanting. There is neither umbilical cord nor um- 
bilical vesicle present, the free embryo being attached to the 
amnion only. 
No. 246. 
Ovum, 30 x 21 x 14 mm.; embryo, 3 mm. 
Dr. Wegefarth, Baltimore. Brodel Collection. 
Dr. Wegefarth writes: “The woman from whom this 
specimen was obtained is the mother of two children, the 
youngest about seven years of age. Since then she has had 
five miscarriages, all of about the same age as this specimen. 
No history of syphilis, but have started to give her iodide of 
potash, with the hope that she may give birth to a child. I 
shall be glad to have you turn the specimen over to Professor 
Mall if it will be of any use to him. It would be interesting 
Fic. 246a—Ovum with window cut out of it, showing dense magma and 
embryo within. 
