76 
OVARIAN PREGNANCY 
interval between them of 3 mm. would correspond to the slice of tissue 
cut out for the longitudinal series. From these figures it will be at once 
O O 
apparent that the vesicle is almost entirely surrounded by recent blood 
Figure XI. Transverse Section through a Portion of the Corpus Luteum and 
Chorionic Vesicle. (T. H. B. del.) 
The areas marked necrotic tissue occupy the mouth and centre of corpus luteum. 
clot. Only at one point does the chorion come close to the ovarian stroma, 
and that is opposite a gap in the wall of the corpus luteum. 
The sections corresponding to Figures xi and xn show that the sides 
of the blood clot are clothed for a distance of about 1 cm. from its base 
