[ IO ] 
the Forehead, the Reftitution of it will appear to* 
him, as it docs to me, to be fpontaneous imme- 
diately upon the Remiffion only of the Aftion of 
the Occipito frontalis : Whereas the true frontal 
Mufcle of Cotter and Douglas can aft no otherwife, 
than in drawing together the Eye-brows downwards 
and inwards, as in Frowning > for the Fibres of this 
Mufcle are direfted from their Originations obliquely 
upwards and outwards ; and, confequently, when 
they are contrafted, they can have no other Motion 
towards their Origination than in the oblique Direc- 
tion juft mentioned > for their Aftion is fucceffive 
to the fpontaneous Reftitution of the Skin of the 
Forehead, after being wrinkled* 
XVI. 
Of the Mufcles of the Eye-lids. 
HTHE Eye-lids have only two Pair of Mufcles 
amongft Authors 5 the Aperiens Palpebram 
reffus, and the Orbicularis ‘Palpebrarum : The for* 
mcr of which being proper to the upper Lid, and the 
latter being common to both upper and under, was 
the Reafon of thefe diftinft Names. But to thefe I 
ftiall now take the Liberty to add a third Pair, and 
call each* the Occludens Palpebram* which conftfts 
of thofe Fibres that cover the upper-Lid, diftinguifhU 
from thofe of the Orbicularis both in Situation and 
Office, as explain'd in the following Obfcrvation. 
And as to Fibres of the under Lids, they are incon- 
jfidcrablc, ferving for no other Ufe, that I know of, 
but 
