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FREDERICK TlLNEY AND LUTHER F. WARREN 



Galeotti 140 in 1896 also recognized two types of cells, i.e., 

 radially arranged, cylindrical cells which bound the lumen of 



Fig. 75 The pineal body in Meleagris gallopavo, according to Studnicka, 1896. 



the organ and small cells between the larger ones. In the large, 

 cylindrical cells, Galeotti found hyaline masses which he con- 

 sidered a secretory product ultimately delivered to the lumen of 



