ANATOMY, AND HISTOLOGY OF THE PINEAL 5 



tion, pigment formation, and so on, as evidence of an endocrin function. 

 This has been questioned on histological grounds by Jordan (&) ; and 

 Dandy and others have shown that experimental extirpation is not followed 

 by characteristic symptoms. Kepeated attempts to vary experimentally 

 the activity of the pineal body, and to find corresponding structural modi- 

 fications in it have invariably proved disappointing. 



