54 



SUPER-ORGANIC EVOLUTION 



seems to be to serve as a support and to insulate 

 some nerves from others, to conserve the integrity 

 of the nervous current ; it is a neuroglic cell. 



FIG. 7. 



Cerebral cortex of the batrachi. e, epithelial zone ; g, cellular zone or zone of 

 the pyramids ; m, molecular zone ; p, pyramidal cells with their proto- 

 plasmic branches and their cylindric centre ; c, n, epithelial cell 

 (neuroglic) with two cilial expansions at its shoot ; o, a large sprout ; t, 

 branched and directed to the periphery where the top little rough 

 varicose branches terminate in a conical dilatation (s). (According to 

 Eamon and S. R. y Cajal. ) 



