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Sect. IX. 
Thefe Hemkrania are two white Bodies, much 
harder than the Subftance which forms the tefta- 
ceous Covering; the inner Surface hollow and 
fmooth ; the outer, convex and rough, with three 
Fibres running different ways; and both together 
perfeftly reprefcnt a double Bit, of that kind of 
Borer, we call an Augar. 
Sect. X. 
The upper Part of the external convex Surface 
(Fig. 3. has a very fharp Edge, in which the firft 
Series of Fibres begins from one Point ; which Fibres 
gradually dilating, and running lengthwife, end about 
the middle Part of it ; and this middle Part makes a 
right Angle with the upper Part. In this Part the Fibres 
being elevated, run crofs-wife (Fig. 3. B.). The lower 
Part is thicker than the upper, but fofter and lefs 
compacl:. In this Part the Fibres are raifed up and 
rough, firft curve, then ftrait, and, like the others, 
run length-wife to the lower Edge of this Part, 
which is ftrongly faftened to the Head by various 
Ligaments (Fig. 3. C, D.). 
Sect. XI. 
The concave or inner Part of thefe Hemkrania^ 
(Sect. IX ) which contains the fofter Parts of the Head, 
is very fmooth ; but almoft in the Middle has a very 
fmall and tender Eminence or Procefs, (in Shape much 
like Dr. Rau ^ Procefs in the Organ of Hearing) fixed 
at one End, and loofe at the other, running almoft 
the 
