430 ESSAYS ann OBSERVATIONS 
twixt it and the uterus ; many lumps of the 
wax being, as it were, wedged into the fub- 
ftance of the placenta, without having enter- 
ed any of its veffels—We then faw many 
{mall ferpentine arteries with their orifices o- 
pening upon the internal membrane of the 
uterus; and other, generally larger, convo- 
luted arteries, whofe extremities we could 
not as yet obferve, appearing prominent in 
. the interftices of cavities filled with the wax; 
and which, in the foregoing paper, are men- 
tioned under the name of /inu/es: the real - 
ftructure and fituation of which, being little 
underftood, tho’ often talked of, I hall re- 
late all that I obferved in this fubject; and 
then, by comparing it with the common de- 
{cription, we may better underftand what 
has mifled moft anatomifts. . 
Tue fmufes are feen without any previous 
diffe@tion upon the inner fide of the wrerus, 
chiefly where the placenta has been fixed ; 
for there are but few of them, and thefe ve- 
ry fmall, in any other part of it-—Their fides 
are membranous, that, next to the cavity 
of the womb, being in each very thin, with 
a large orifice in it. They can be readily dif- 
tended, by blowing air, or injeCting a li- 
~ quor 
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