27 
for the Croonian Lecture. 
These fibres are not uniform circles or ovals, since the layers 
are of different thicknesses in particular parts ; aa the fibres 
where they are most numerous ; bb where they are least so. 
Fig. 2d. A section of the crystalline humour, the central 
part being removed, to shew the fibrous structure of the sur- 
rounding lamina?. 
