586 



THE DUCTLESS GLANDS ENDOCKIN GLANDS 



organs (e.g., brain, and digestive system) no doubt bold a similar de- 

 pendence upon tbe secretions (hormones) of the ductless glands. More- 

 over, tbe ductless glands themselves seem to sustain interdependent 

 relationships among themselves and with the genital glands. 



IT^;<P^8&:U . 



&&&&*>?' '-" -'^v- -.* 

 *::' v,r?>V-? *'5u- 

 rf-- ": :-: : --- ' ..-* 



'* 



%$^Mz:;'t>L t 

 |v?^^rt^ 



FIG. 504. SECTION OF PINEAL BODY OF AN OLD SHEEP, SHOWING ' BRAIN SAND ' 



(ACERVULUS) IN THE PARENCHYMA. 



(For recent reviews of literature on the epiphysis cerebri see Kidd, 

 "Tbe Pineal l!(.dy: a Review," Re. Neur. Psyc., Jan. and Feb., 1913; and 

 .Ionian, "Results of Recent Studies of the Mammalian Epiphysis Cerebri," 

 Trans. Anu-r. Mii-r. Soc., :!!, 4, 1912.) 



