These two Iaminee are connected by an intermediate stratum; which is destitute of
pigment-cells and consists of fine elastic fibres. On the inner surface of
the lamina chorio-capillaris is a very thin, structureless, or, according to
Kolliker, faintly fibrous membrane, called the lamina basalis or membrane of Bruch; it is closely
connected with the stroma of the choroid, and separates it from the
pigmentary laver of the retina .
• Tapetum.-This name is applied to the
iridescent appearance which is seen in the outer and posterior part of the
choroid of many animals.
The ciliary body should now be examined. It may
be exposed, either by detaching the iris from its connection with the Ciliary muscle, or by making a transverse section
of the globe, and examining it from behind.
The ciliary body comprises the orbiculus ciliaris,
the ciliary processes, and the Ciliary muscle.
The orbiculus ciliaris is a zone of about
one-sixth of an inch in width, directly continuous with the anterior part of
the choroid; it presents numerous ridges arranged in a radial manner.
The ciliary processes are formed by the plaiting and folding inward of
the various layers of the choroid-i. e., the choroid proper and the lamina basalis-at its anterior margin, and are
received between corresponding foldings of the suspensory ligament of the lens,
thus establishing a connection between the choroid and inner tunic of the
eye. They are arranged in a circle, and form a sort of plaited frill behind
the iris, round the margin of the lens. They vary between sixty and eighty in
number, lie side by side, and may be divided into large and small j , the latter, consisting of about one-third of the .entire number, are
situated in the spaces
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