uman anatomy is called the vermis.
It is connected below with the medulla oblongata by the two restiform
bodies which form its _inferior peduncles_, and above with the corpora
quadrigemina of the cerebrum by two bands, which form its _superior
peduncles_; whilst the two hemispheres are connected together by the
transverse fibres of the pons, which form the _middle peduncles_ of
the cerebellum. On the superior or tentorial surface of the cerebellum
the median or vermiform lobe is a mere elevation, but on its inferior
or occipital surface this lobe forms a well-defined process, which
lies at the bottom of a deep fossa or _vallecula_; this fossa is
prolonged to the posterior border of the cerebellum, and forms there a
deep notch which separates the two hemispheres from each other; in
this notch the falx cerebelli is lodged. Extending horizontally
backwards from the middle cerebellar peduncle, along the outer border
of each hemisphere is the _great horizontal fissure_, which divides
the hemisphere into its tentorial and occipital surfaces. Each of
these surfaces is again subdivided by fissures into smaller lobes, of
which the most important are the _amygdala_ or _tonsil_, which forms
the lateral boundary of the anterior part of the vallecula, and the
_flocculus_, which is situated immediately behind the middle peduncle
of the cerebellum. The inferior vermiform process is subdivided into a
posterior part or _pyramid_; an elevation or _uvula_, situated between
the two tonsils; and an anterior pointed process or _nodule_.
Stretching between the two flocculi, and attached midway to the sides
of the nodule, is a thin, white, semilunar-shaped plate of nervous
matter, called the inferior _medullary velum_.

The whole outer surface of the cerebellum possesses a characteristic
foliated or laminated appearance, due to its subdivision into
multitudes of thin plates or lamellae by numerous fissures. The
cerebellum consists of both grey and white matter. The grey matter
forms the exterior or cortex of the lamellae, and passes from one to
the other across the bottoms of the several fissures. The white matter
lies in the interior of the organ, and extends into the core of each
lamella. When a vertical section is made through the organ, the
prolongations of white matter branching off into the interior of the
several lamellae give to the section an arborescent appearance,