Structure of the Pineal 



119 



that it usually becomes detached from the brain if the pia mater 

 torn away. 



Fig. 83. — Section of pineal, new-born child. Magnified 400 diameters. Three or four 

 large sinus-like vessels engorged with blood are included in tbe section. 



Fig. 84. — Section of pineal of ox, stained with iron-hsematoxylin. Magnified 300 diameters. 

 I am indebted to Mr Edgar Beard for the specimen from which this microphotograph was 

 taken. The cell protoplasm and the reticular tissue between the cells are well shown. 



Sections of human pineal show it to be composed of epithelium-like cells 

 arranged in loosely disposed trabecule with large sinus-like blood-vessels 

 between the trabecules (fig. 83). In some animals plain muscular tissue, 

 and even striped muscle, has been described in the intertrabecular tissue. 



