THE PINEAL ORGAN OF MAMMALS 



317 



Fig. 218. — Pineal Body of a Young Boy, showing Branched Parenchyma 

 Cells, Peripheral Processes of which end in Club-shaped Enlargements 

 in the Interlobular Connective Tissue or in the Sheaths of Vessels. 

 (After del Rio-Hortega.) 



A : parenchymatous cells. C : interlobular tissue. 



B : marginal claviform processes. 



D : vessel with club-shaped processes in 

 its adventitia. 



Fig. 219. — Cells with Granular Protoplasm from the Epiphysis of Bos 



TAURUS. 



Some (a) have their whole body filled with granulations, others (b) have only a 



thin peripheral layer showing granules ; (c) cell with a vacuole. 



(Weigert's method. After Dimitrowa, 1901.) 



