[ S3 1 3 
The Heart of the fmaller Child was Angle, but 
above a third larger than it naturally ought to be ; 
out of which the afeending Arteries are very regular 
and natural 5 but there was fcarce any YTftige of 
Lungs in this Child on the right Side of the Thorax , 
*md but a fmall Portion of the pulmonary Subftancc 
in the left. The defeending Trunk of the Aorta is 
very fmall in comparifon of the other; yet goes 
down regularly towards the Extremities, except the 
internal Iliac Arteries , which were obliterated and 
degenerated into Ligaments, whilft the Externals 
continued down, as I have juft faid; for only the 
lliacs of the larger Foetus took place in the umbi- 
lical Cord, which was the Rcafon that we found 
but two Arteries in it; fo that, altho’ both Children 
received Nourifhment by the Divifion of the Canal 
from the Liver to the Vena cava, yet the fuper- 
ftuous Blood of both could be fent back to the 
Flacenta no other way than by the internal lliacs 
of the greater Child. 
The defeending Branches of the Vena cava enter’d 
as ufual, on the right Side, into the Auricles; but 
thofc of the left join in one Trunk, pafs round the 
left Auricle, and enter into the right clofe by the 
Cava afeendens , which is of a natural Size, and 
very regular up to the Diaphragm, from which it 
extends a full Inch before it reaches the Auricle ; 
the Kidneys differ a little in Size from each other ; 
yet thefe, with the other urinary and alfo the uterine 
Parts in general, are in good Order- but the moft 
remarkable Lufus of Nature in thefe Subjects is an 
Artery which arifes from the Aorta about the Place 
of the Celiac of the one Child, running along 
A a a a before 
