No. 1.] ORIGIN OF HUMAN MONSTERS. 330 
No. 358. 
Ovum, 30 x 16 x 10 mm. 
Dr. Swett, Bangor, Me. 
“Pregnancy of six weeks duration.” The outer surface of 
the ovum is smooth and the specimen runs out into a pedicle 
which was undoubtedly attached to the uterus. Sections show 
that the villi are matted together, with much blood and syn- 
cytium between them. Around this there is a fibrous decidua 
in which there are many leucocytes. The mesoderm of the 
chorion is somewhat fibrous, the change being especially well 
marked in some of the villi. No blood-vessels are present in 
the villi. 
The cavity within (ceelom) measures 8 x 6 x 6 mm., is 
lined by a layer of reticular magma, but contains no trace of 
the amnion nor embryo. 
No. 361. 
Ovum, 10 mm. in diameter. 
Dr. Egbert, Washington. 
“The ovum was found in a mass of blood within the 
abdominal cavity, due to a tubal abortion. The operation 
was performed just 41 days after the beginning of the last 
menstrual period.” 
The specimen came into my hands after it had been in 
water for 24 hours. It was well covered with villi and filled 
with a mass of dense reticular and granular magma. No 
embryo could be found by direct observation. The specimen 
was macerated too much to allow careful microscopic exami- 
nation. 
No. 364. 
Ovum, 90 x 50 x 40 mm.; embryo, 16 mm. 
Dr. Merrill, Stillwater, Minn. 
The ovum is covered with a few ragged villi, over which 
there is some decidua which is more or less detached. Dr. 
Merrill had placed the specimen in formalin and sent it to 
me accompanied with the following letter, dated July 6, 1906: 
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