MO THE ESSENTIALS OF HISTOLOGY. 



other motor nuclei. All the nerve-fibres of the optic nerve and optic 

 tract do not enter the corpora quadrigemina. Some pass into the 

 lateral geniculate bodies and form arborisations here. On the other 

 hand, from the cells of these geniculate bodies the axis-cylinder pro- 

 cesses appear to pass to the cortex of the brain (occipital region). The 

 probable relations of some of these fibres and cells of the nervous visual 

 apparatus is indicated in the annexed diagram (fig. 270). 



