EPIPHYSIS CEREBRI 



579 



physis, resting in a depression in the floor of the seila turcica. This was 

 found in over eighty per cent, of dogs examined. It is interpreted as a 

 remnant of the embryonic Kathke's pouch. It is said to vary greatly in 

 size and histological character, occasionally extending to the 'pars inter- 

 media,' and to have an individual blood supply and possibly also a nerve 

 supply. A parahypophysis has not yet been reported for man. 



FIG. 497. FIELD FROM THE CENTER OF A NORMAL CANINE (PUPPY) PARS 



ANTERIOR DISTALIS. 



Note the excess of eosinophils lining the sinuses. No basophils in the field, 

 as they are more in evidence in the glandular periphery. The central elements in 

 the cell columns are neutrophilic. (Hauptzellen.) 



In the hypophysis of the ox, Wulzen (Anat. Eec., 8, 8, 1914) has 

 described a cone-shaped structure in connection with the 'pars intermedia' 

 resembling in. cellular constitution the pars glandularis but differing in 

 having finer connective tissue septa and smaller acini. 



IX. EPIPHYSIS CEREBRI 



(Pineal body) 



The EPIPHYSIS (pineal body, pineal gland or conarium) may be 

 provisionally regarded as an endocrin gland. Its glandular function 

 may be of importance only during late fetal and infantile (or pre- 

 puberal) life, when it may control normal growth. The mammalian 



