68 THE EYE. 
Describe the crystalline lens, 
It is a transparent, double-convex body, made up of laminated fibres, 
and enclosed in a homogeneous elastic capsule. The suspensory liga- 
ment is firmly attached to its peripheral zone. The body of the lens, 
while transparent, is not structureless. Behind the anterior wall of 
the capsule there is a single layer of flattened, polygonal-shaped cells, 
which at the margin of the lens becomes elongated and passes into the 
lens fibres. These fibres are long and ribbon-shaped and are inti- 
mately cemented together. They have finely serrated edges and on 
cross section appear prismatic in shape. Many of the superficial Jens 
fibres are nucleated, these fibres having been developed by an elonga- 
tion of epithelial cells. 
For a description of the ear and nose, see the volume on Anatomy 
of this series. * 
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