386 



THE PINEAL ORGAN 



Fig. 263. 



A — Oligodendrocytes in relation with pyramidal cell of cerebral cortex : human. 

 B — Microglial cell, in relation with nerve-cell of grey matter. C — Fibrous 

 astrocyte, showing perivascular feet and gliosomes. D — Protoplasmic 

 astrocyte, also showing perivascular expansions and gliosomes. 



F. As. : fibrous astrocyte. OL., OL.D. : oligodendrocytes. 



Gl. : gliosome. P. As. : protoplasmic astrocyte. 



M. Gl. : microglial cell (mesoglia). P.V. Exp. : perivascular expansion. 



N.C. : nerve cell. Sp. : spines. 



(After Penfield and Cone, redrawn from Cowdry's Special Cytology.) 



