( *6i ) . 
b. The Crena for the Membrana Fig. 13. reprefents the Bones of 
Tympani. 
c. The Cavitas Tympani, endued 
with feveral Cells , and In.er- 
ftices betwixt them. 
d. A Continuation of the fame 
Cavity. 
e. The Orifice of the hard Por- 
tion of the Nervus Auditorius. 
/.The raggedMargin of theBone. 
Tig. 1 1 . reprefents the inner Sur- 
face of the upper part of the 
Procejjus Petrofus . 
a. a. The ragged Margin of the 
Bone. 
b. b. The upper part of the Ca- 
vitas Tympani. 
c. The Foramen Ovale. 
d. A Protuberance, within which 
is the Cavity of the Cochlea. 
e. The Orifice for the hard Por 
tion of the Nervus Auditorius. 
Fig. 12. reprefents the Meatiu 
Auditories with the Proccjfks 
Petrofus. 
a. The External Orifice of the 
Procejfus Petrofus. 
b. b The Meatus Auditories de- 
riv’d from the Lamina above, 
and running from the outer 
Table to the Procejfus Petrofus. 
t. c. The Lamina and Cellules, as 
they proceed from the Pro » 
cefjus Petrofus on each fide. 
d. The Procejfus Petrofu . 
e. Orifictum Foraminis Nervi Au- 
dit or ij. 
f . Part of the inner Table of the 
Scull. 
the Ear in their proper Di- 
menfions and different Views, 
a. J he Malleolus. 
b. The Incus. 
c. The Stapes without the Bafe. 
d. e. The back-part of t hz Mal- 
leolus and Incus articulated to- 
gether. 
f. The Stapes with its Bafe. 
g. The Malleolus, Stapes, and In- 
chs articulated together^where- 
by is (hewn the true diftance 
betwixt the Membrana Eafs 
, Tympani, and the Foramen O- 
vale, which the Bafe of the 
Stapes fhuts. 
h. The Bafe of the Stapes. 
Fig . 14. reprefents the Seat of 
the Brain enlarg’d, that the 
Orifices for the Blood Vef- 
fels and Nerves may be the 
more obvious. 
a. a. '■ he inner Table depriv’d 
of the furrounding Cellules. 
b. b. The anterior Sinus. 
c. c. The Os Ethmoides, with its 
Eminences, S«/ci, and Foramina 
for the Tfervm OJ fatter tut. 
d. The Crijta G alii. 
e. e. The anterior Eminences. 
f. f. The Orifice for the Ncrvm 
Opticus. 
g. g The Hole called the Fora- 
men Lacerum , through which 
pals the Nervi ALotor’j Pathe- 
tki Ophthalmia, or firfl: Branch 
of the 5th and the 6tb Pair. 
h. h. The 2d Branch of the 5 th 
Tair. 
