THE PINEAL BODY 



157 



the remnant of the pars intercalaris anterior forming the lamina 

 inferior. These two laminae form the walls of a cul-de-sac, the 

 suprapineal recess. The small space bounded by the pineal 

 peduncle is the pineal recess. 



In regard to its relation to the corpus callosum, Cutore ('10) 76 

 states that there are three varieties of the pineal body in mam- 

 mals, i.e., 1) subcallosal, as in marsupials, some artiodactyla, 

 insectivora, carnivora, and primates; 2) retrocallosal, as in 

 most artiodactyla and perissodactyla; 3) supracallosal, as in 

 rodents. Cutore ('10) 76 gives the following figures indicating 

 the relative weight of the pineal body to the brain and also 

 the pineal index: 



The following tables give the diameters of the pineal body in 

 man, according to several different observers, and also the 

 differences at different periods of development as reported by 

 Cutore: 76 



Diameter of the pineal body in man in millimeters 



