[ 3i ] 
feter , which pull it upwards, and the T>iga/lricur, 
Pterigoidaus internus , and Pterigoidtfits externus , 
which ferve to draw it downwards, we fhall omit 
their Defcriptions here, fince they do nor come 
under the Subjed we are at prefent confin’d to 5 
which is only to treat of thofe Mufcies alone, 
whofe Motions are fubjed to the Influences of the 
Paflions of the Mind, in altering the Countenance^ 
or which ferve to its formation. 
The End of the Eirft Left ure. 
