(i9U) 
wliich rifes from the Procejf^f Pterlgoides, being fa tisfied. 
wirh defcribing only the lower part of it, which fprings 
from the Tongue and the 0/ Byoidesy which he makes 
be two pair ot diftinft Mufcles. I wonder how he came 
to overlook this, which I always obferved to appear ia 
DJfledion, as Mr Covpfer has defcribed it, fince his happy 
Induftry has lead him to the difcovery of feveral parts in 
the Ear, &c. which are not to be found in any Book 
extant. 
He fays the Mufcnlus Chondrogloffus, defcribed by a cer- 
tain Modern, is not always to be found. 
The Artery that furnifhes this Cavity with Blood goes 
oflF from the Carotide, while in its oblique Canal in the 
Os Petrofum: And the Vein that carries back the refluent 
Blood opens into the Diverticulum of the Jugular Vein. 
He thinks it may have Lymphaticks as well as the external 
Cavity of the Ear. 
H^ reckons the Chorda Tympani to be a twig of the Por- 
tio duriiV 
He fays, that there are twelve Orifices that open into 
the Vefiibulumy viz. the Fc^ejlra Ovalis^ the five Orifices of 
the Semicircular Canals, one of the Canals of the Cochlea^ 
and five holes that admit fo many twigs of the Ponio moU 
lis Nervi Anditarii. 
He diftinguiflies the Semicircular Canals into the major^ 
minor or minimus^ 
He is very nice in adjufting the different lengths of thefe 
Canals, and the proportions they bear to one another in 
their Diameters, which arc different in different fubjedis, 
but always alike in both Ears of the fame fubjeCt. 
The Cochlea confifts of a Modiolus or Cone and a Septum^ 
which divides itintotwoCanals,which he calls ScaU-^ that 
which refpeSs the Fenejlra rotunda is the Scala Tympani or 
Superior 5 the other which communicates with the Vejilbulum 
he calls the VefiibuU Scala : He is alfo very curious in afcer- 
taining 
