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52 ANATOMY
TIic Jugular Notch is a smooth semicircular concavity, extending
half an inch outwardly and three-fourths ofan inch anteriorly, forming by
its articulation with the temporal bone the jugular or posterior lacerated
foramen. This foramen is frequently divided by one or more septa, and
through it the ninth, tenth, and eleventh pairs of nerves pass out of the
brain-case. It is at this point also that the lateral sinuses terminate and
the internal jugular vein commences.

Fig. 15.
Su/ievLo,- Antflf:

^'i^^Lateral
,, y^Angl,

Jaifcriop Analp \^
Occipital Hone, inner surface.
The External Surface.—On each side of the lateral borders of the
foramen magnum are the two condyloid processes (exoccipitales) which
articidate with the atlas (the Hrst cervical vertebra).
The ComJi/les are elliptical in form and converge somewhat in front.
Their surfaces are convex, both transversely and longitudinally, being
divided into two articulating ihcets, which are occasionally sc])arated by
a transverse groove. The inner side of each condyle is roughened for