PLATE I. 
Fig. 1. Section through the Decidual Lobule, figured on page 10. Photograph at a 
magnification of 27 d. a, upper border ; b, lower border of lobule ; m.g., mouth of a 
gland ; p.e., point of entrance. 
The section cuts the lobule in the long axis of the shred of decidua. The free surface 
of the mucous membrane lies to the left, the deep surface to the right. In the centre 
is seen the cavity of the blastocyst. Pound it is a mass of irregular plasmodium 
occupying the blood-fillecl implantation cavity. The swollen decidua shows dilated 
glands, and much enlarged vessels. Near the deep surface the vessels are dilated into 
almost sinus-like channels. There is a haemorrhage in the upper part of the section. 
The photograph represents at a lower magnification the same section as drawn in 
colour on Plate III. 
