SPOLIA NEMORIS. 99 
delicate but prominent web (figs. 24 and 25) against the inner 
uterine surface. 
The foetus is connected with it by means of ashort umbilical 
cord. Besides, there is a vascular connection between the foetus 
and the remains of the yolk-sac. 
The latter is represented in figs. 26—28, whereas in fig. 24 
it has been dissected away in order to show the embryo enclosed 
by the amnion in its attachment to the placentary region. 
In fig. 26 nothing has been removed but the uterine wall. 
The blood-vessels radiating over the yolk-sac are as distinctly 
visible as a spirit specimen will admit of. To the right as well 
as to the left the cut lumina of blood-vessels (cf. figs. 10 and 
11) are seen to take their course in the thickness of the uterine 
wall. re 
On the right the placenta is represented by one free border, 
which is, moreover, loosened from any uterine attachment ; the 
rest of the placenta is hidden from view by the embryo and its 
envelopes. 
In the next figure (fig. 27), which has reference to this same 
specimen, the embryonic sheaths have been opened and the 
embryo is removed. ‘The membranes to the right are the yolk- 
sac and the amnion. At the bottom ef the uterine cavity the 
placenta can be distinguished. 
In fig. 28 the embryo with its envelopes and with the 
placenta has been wholly scaled out of the uterus. Of the 
placenta an indented border is seen to the left of the figure, 
whereas to the right only the yolk-sac has-been dissected and 
turned over; the amnion, however, is still in its place, and 
hides the embryo from view. 
We have now to say a few words concerning the outer aspect 
of the uterus before and during pregnancy. More than in any 
of the species hitherto noticed the uterus of Galeopithecus may 
be said to be double, the vagina being spacious and thick- 
walled, and the two halves of the uterus (cf. figs. 2, 6a, 7a, 8a, 
and 9a@) opening out into the vagina by separate openings. 
There is no unpaired median cavity in common between the 
two uteri, communicating by means of a single “ os uteri ” with 
