NEUEOGLIA 



463 



their non-medullated processes, the white matter containing only 

 the medullated processes of the nerve cells, which are known as 

 nerve fibres. 



THE 'SUPPORTING TISSUES OF THE CENTRAL NERVOUS 



SYSTEM. Both the grey and the white matter of the central 



nervous system contain a peculiar supporting tissue, the neuroglia, 

 which consists of two elements, the glia cells and the glia fibres. 



