182 MALL. [Morsecexe 
filled with migrating cells, but its blood islands and its ento- 
derm appear normal. The chorion is fibrous. The outer 
covering of the vesicle is composed of a short layer of col- 
umnar epithelial cells. The magma of the ccelom is filled with 
wandering cells. 
Fic. 97.—External surface of the chorion. Natural size. 
The nervous system is greatly dilated and dissociated. The 
liver tissue is obscured and filled with migrating cells. The 
contour of the abdominal viscera is obliterated and they are 
likewise filled with migrating cells. Pharynx, heart, large 
veins and aorta are greatly dilated. 
No. 104. 
Ovum, 35 x 35 x 15 mm.; embryo elongated, 12 mm. long. 
If curled upon itself it would measure, C. R., about 7 mm. 
Dr. J.-P West, Bellaires'Ohio: 
“The beginning of the last menstrual period was on May 
7, and the abortion took place on June 11, 1897. The entire 
ovum was preserved in strong alcohol.” 
The villi of the chorion appear atrophic, being wanting on 
one side of the ovum. After the ovum was carefully cut in 
half it was found filled with magma partly reticular and partly 
granular. On one side is a snake-like embryo with straight- 
ened head and atrophic extremities. The embryo, with a 
piece of chorion to which it is attached, was cut into serial 
sections. 
