Procdius 
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7. 8. 
•Sinus for 
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gradually outward below, forming an Arch in its Progrefs. 
Streight downward from the loweft part of the Coron <c, the Jaw 
is at the thickeft (c.) and he e it begins to run obliquely for- 
ward, till meeting with the fame part of ihe Bone from the o- 
ther fide, it terminates in the Proetjfus Mer.ii (h. Fig 9. f.Ffg. 7 ) 
which about 2 Inches runs obliquely outward, and feem> very 
convenient for defending the Mouth from the Inconveniences of 
the Trunk which by its weight would prels too much upon it, 
were it not defended both by that part of the Of Palau , which 
runs down from the Teeth in the Upper Jaw, upon which it leans ; 
and by this Symphyfis or Procejfus Merit*, h.e. which keeps it (fill 
inclining downward, and fuffers it not to bend inward : Add alfo, 
that thisProcef may affift the Probofcis fomewhatin its Elevation, 
when the Animal bending the Head a little forward, may male 
the Point pulh or bear up the Probofcis from above it. As the low- 
er part ol the Jaw in its Progrefs forward runs obliquely down- 
ward, fo its upper part of the Root of the Teeth runs (freight 
forward, or rather inclines a little upward (c.e ) fo that whereas 
’tis only 6 ^ Inches from above to below at the joining of the 
Teeth, now ’tis 7 ~ Inches (freight downward, (and here its Sur- 
face is more plain, for before ’twas convex, and as it were half 
round ) but along the edge of the Sinus for lodging the Tongue 
(d.e.) totheoutmoft point of the Proetjfus Menti , ’tis 9 Inches., 
Now we confider the inner part from the Place where we left it,, 
and find it Hill more plain •, where meafuring from below the 
forefaid joining of the two Teeth (freight forward, tis 4 Inches 
on each fide, till both meet in a Semicircle (f.) about 3 Inches. 
Diameter at the lower part, and fomewhat nearer at the Root 
of the Teeth. After it has run 2 Indies upward, it runs (freight 
forward with a convex Surface 4 Inches thick ; thence it afeends 
4 Inches more to the Root of the Teeth (d.) This Sinus is for lift- 
ing the Tongue, Which is very narrow and pointed Thus ha- 
ving given a particular Account of the External Figure and Shape 
of the Lower Jaw, we (hall confider it in general. The Con - 
dyles are 12 Inches inclufive diftant •, whence the Bone running, 
downward, and lomevvhat backward 3 Inches, forms an obtufe 
Angie, which is 17 Inches exclufive diftant from iis oppofife ^ 
and here the Bone begins to fwdl to a confidera&le thicknefs by 
degrees: From thence defending gradually 8 Inches, ’tis 18 
Inches dilfant; thence inclining obliquely forward a Inches more,. 
Tis 14 ~ Inches diftant ; inclining ftill more forward to the 
Bale w -ere the two Rones m.et, rite Bone (fill becoming thinner,. 
’tisr 
