No. 1.] ORIGIN OF HUMAN MONSTERS. 109 
TABLE IX. 
ARRESTED DEVELOPMENT OF THE EMBRYO, 
(Fourth Week.) 
a! 1 j 5 
No. ae eee | gi tas Changes in Chorion. 
mm. mm. days 
122 5 20X16x6 65 Atrophic. 
136 5 tA SIT xX 6 56 Atrophic. 
150 5 36 0 SEO But few villi. 
291 5 ? Atrophic. 
398 5 : : 
334 5 | sox 40x30 | 4wks. | Fibrous. Infiltrated with leu- 
cocytes and syncytium. 
80 5 24xX18x8 Small amount of mucoid mass 
between the villi. 
401 5:5 
340 6 
207 6 3 mo. 
104 7 oe nied lane i. pe a al 35 Atrophic. 
379 | 4th wk. | 35x 25 X15 | 10 wks. | Fibrous. 
60 8 
IIO 8 46 X 30 X 30 82 Fibrous. Invaded by leuco- 
; cytes. 
I4I 8 40 X 30 X 20 78 Fibrous. From same woman 
No. 110 was obtained. 
275 8 40 X 30x25 | 2mo. | Fibrous. 
285 8 4525535 % 35 We Very fibrous. Atrophy. 
289 8 4 wks. 
ane 8 26 Ges TO Fibrous. Invaded by leuco- 
cytes. 
347 8 40 X 35 X 30 Fibrous. Infiltrated by leu- 
cocytes. 
336 8 Bh xa 2hoe 15 Hyaline and fibrous. 
Specimen No. 136 contains in it a normal embryo of the 
fourth week, but its enveloping chorion is too small for its 
age. The villi of the chorion are fibrous, but contain a large 
number of blood-vessels which are well distended with blood. 
The syncytium is very active and no doubt provided well for 
the embryo. The only marked changes in this specimen are 
the fibrous chorion and the excessive amount of magma re- 
ticulé in the ceelom. Possibly the inequality of things may 
have brought about the abortion. 
Of the remaining specimens of the first group, No. 312 
shows the least amount of change in it. The embryo, how- 
ever, is straight, shows three gill arches and some myotomes. 
The spinal cord can still be outlined in the tissue of the body, 
which is well filled with round cells. 
