f co8. ; ) 
man Subjefls the Glenoid Cavity, meafuring from that part of it 
which is toward the Hole for the Artena dura matris {q.ql) till 
you come to th^, extremity of the Os Zygomaticum , is 5 i In- 
ches long. This Sinus is fcarce at all deptefl; ; ’tis rather Pro- 
tuberant, witha Semicircular Surface from above to below : 'Tis 
well enough guarded on both Tides*, fo that notwithftanding 
this Protuberant Reception for the Condyles , yet their Dillocation 
is prevented by the extremity of the Os Zygomatic um on the 
out fide' (x.) and on the infide, firft by an hollownefs, and then 
by a Riling in the Bone. And this Contrivance feems to facilitate 
the Motion ol the Jaw very much- for had this Sinus been pre- 
portionably lo deep (however Superficial it may be) as in Human 
Subjects, its Motion had not been fo very free, as we fee it is : 
For by this half round Surface, the Condyles have the more fpace 
to move backward, and the Lower Jaw to be depreft, that it may 
move forward, and prefs the Aliment againft the Upper Teeth 
with the greater Force • the Mufcles alfo prevent its falling too 
much back, and the Os Zygomaticum its inclining too much to 
either fide, as is obferv’d. Above the big Procefs of the Os 
Maxilla , which is articulated with the Os Zygomatieum, is the 
Orijicium meatus Juditorij (k.) which being (jval, is one Inch 
long, and i Inch broad. Betwixt this external Orifice and the 
Procejfus Petrofus, the Meatus is 8 Inches long} whereof hereaf- 
ter. By means of this great Sinus on each fide, the Bafts of the 
Scull is fo contracted, that from the Hole (y.j down toward the 
Root of the Teeth (3.4-) which is 9 Inches long, the breadth 
is but 7 t Inches. T'rom the extremity of the honey part of the 
zAqucduh downward, the Bafc of the Scull is compos’d .of two 
cavous Bones, about 2 ~ Inches thick, and a large Sinus in the 
middle 5 i Inches Diameter (X ) at the end of the Sinus for the 
flcfhy part of the Aquedutt, and at the Root of the Teeth 4 i In- 
ches. This Sinus , after Tis become 2 Inches deep, terminates in 
the Choana. This Paflage is 8 Inches long, and 2 i Inches broad, 
with the rower in the middle (h.) extending from hence to the 
Root of the Trunk 8 Inches. The back part of this Vomer is (harp 
and thin, but its fore-part thicker, con biting of two Lamina. 
‘Dr. Moulin s is of Opinion upon Obfervation of the Tongue, where- 
of before, that the Elephant only Breaths by this Palftge, and 
not by the Mouth. I do not find that this Paflage is proportio- 
nally more Patulent in this Animal than in any other, only it 
leemsto be more diredt ; for as in other Animals this Hole com- 
municates 
