94 MALL. [Vou. XIX. 
doubt protected and held together what little of the embryo 
there was left. The cord extends to the chorion in the wall 
of the amnion, showing why the yolk sac, described on page 
80, broke away so early. The amnion fills only half of the 
coelom, the remaining portion being stuffed with a dense mass 
of magma reticulé. 
No. 257 is similar to No. 130, inasmuch as both of them 
have small bodies upon the end of the cord, representing the 
remnants of the embryo. However, it is much older, the 
chorion being larger and many of the villi having under- 
gone fibrous changes are atrophic. The body at the end of 
the cord is not the remnant of the embryo, but simply its 
continuation, with the umbilical vein running through it. 
Although this specimen might have passed for a normal one - 
when examined superficially, more careful examination 
showed that the decidua was infiltrated with leucocytes. The 
chorion is lined by the amnion, which is mostly adherent and 
contained a clear fluid. No remains of a disintegrated em- 
bryo were found within the amnion. 
Another specimen with a small remnant of the embryo is 
No. 342, which is from a tubal pregnancy. Attached to the 
free end of the cord is a bit of tissue which must belong to 
the embryo, with a small mound of active cells growing in 
it. The chorion, amnion and ‘cord have undergone fibrous 
degeneration. 
Nos. 25, 32 and 198 are specimens of simple ova with a 
naked cord projecting into the amniotic cavity in each case. 
In No. 198 the amnion is filled with reticular and granular 
magma intermingled with scattered flakes of the embryo and 
numerous free cells. The cord is rounded at its free end and 
its blood-vessels are empty. The mesoderm of the chorion, 
villi and cord is fibrous, with an excess of spindle-shaped cells 
scattered through it. Similar stages are shown in specimens 
Nos. 32 and 25. In both of them the blood-vessels are well 
filled with blood, and in the first there is an extensive wander- 
ing of blood cells into the surrounding tissue, especially at the 
tip end of the cord. Here they stain intensely with carmine 
