56 



SUPER-ORGANIC EVOLUTION 



also presents a novelty in the fact that, instead of 

 the ramifications taking form at the root of the 



FIG. 8. 



Cerebral cortex of reptiles. A, molecular superficial sheath ; B, sheath of the 

 fibres or pyramids ; C, deep sheath molecules or polymorphous corpuscles ; 

 D, sheath of the white substance ; E, epithelial sheath ; a, b, pyramidal 

 cells with their protoplasmic branches (p, d), and the cylindric centre ; 

 e, m, epithelial neuroglic cell. (According to Ramon and S. R. y Cajal.} 



trunk, they now take rise in a shoot, as we can see 

 in the neurona in the same fig. 8. 



