518 
+ Aliant Vessels 
Vers]. 
off Ser Allant. “esse/s 
L 
Right Se 
Pr. g.5. Ventral View of @ Trronyd 
Emino Hides da wih ‚ls Foetal 
Mer branes Shi ghrh Enlarged, 
touch, and fuse with each other. 
ll 
Yo 
1, 
4, 
1 
The sero-amniotic connection has 
been driven forward until it is 
now on the ventral side. It is 
bent into a V-shape and com- 
pressed into a comparatively small 
space. Its axis which was ori- 
ginally parallel with that of the 
embryo is now at right angles 
with the latter. Immediately 
posteriorly to the sero-amniotic 
connection, there is a triangular 
area which is never covered by 
the allantois. Here the mesoblast 
of the amnion and the yolk-sac 
on the inner side, and of the 
serous envelope on the onter side 
The apex of this triangle is bounded 
by the V-shaped sero-amniotie connection, 
From the lateral angles 
Uf 
My 
