FIG. 10. 



Cerebral cortex of mammiferae (a rat a month old). A, molecular sheath ; B, sheath of 

 little pyramids ; C, sheath of the great pyramids ; D, sheath of polymorphic cor- 

 puscles ; E, sheath of white substance ; F, extract of the neuroglic epithelial cells ; 

 a, 6, little pyramids ; e, a large pyramid with protoplasmic expansions ; d, the cylin- 

 dric axis ; e, n, neuroglic epithelial cells ; s, neuroglic cell ; v, vaso with three 

 neuroglic cells. (After S. R. y Cajal.) 



