180 MALL. [Vou. XIX. 
No. 93. 
Solid mass, 40 xX 20 mm. 
Dr. Cassidy, Baltimore. 
The specimen was sent to the laboratory fresh and was 
hardened in formalin. Upon opening it, it was found that 
within there is a cavity into which projected a large tongue of 
fleshy tissue. Within this tongue there is a clot of blood as 
well as a sharply defined cavity. 
Sections, through different portions of the specimen, 
showed that the outer sac is the decidua and that the tongue 
of tissue is the chorion. Within the central cavity of the 
tongue (ccelom) lies the amnion. I cannot state definitely 
whether or not the remnants of an embryo were present, for 
the specimen was not cut into serial sections. The walls of 
the chorion are thickened and irregular, and around it are 
packed hypertrophied villi with great quantities of syncytium 
and blood between them. Covering the villi and syncytium 
there is a layer of blood and fibrin separating them all from 
the decidua. Within the mesodermal tissue of the chorionic 
walls there are occasional islands of syneytium. 
No. 94. 
Ovum, 50 x 40 x 30 mm.; embryo, C. R., 20 mm. 
Dr. Knill, Detroit, Mich. 
Ovum is smooth with villi on one side of it only. The 
amnion does not fill the chorion completely ; it measures 30 x 
20 mm. Within the amnion there is much coagulated matter 
which envelops the embryo completely. This granular magma 
can be picked off easily in large flakes. The embryo thus ex- 
posed is bent upon itself more than usual and appears mace- 
rated, as if it had been dead for a number of days. The 
features are not clear, the tips of the hands and feet not being 
well defined. The lower part of the embryo is necrotic and 
the spinal cord is protruding. The entire ovum has been 
hardened in alcohol. | 
The sections show that the villi of the chorion are some- 
what atrophied, with occasional nests of leucocytes within 
