262 



Frederick Tilney, 



migration of the hypophysis into the deepened sella turcica, which 

 carries the main body further away from the floor of the third ven- 

 tricle. This is illustrated in text figure 2. 



In order to demonstrate the relations of the juxtaneural epithelial 

 portion to the brain, reconstructions were made of the hypothalmic 

 region in certain adult animals, showing the pituitary gland in con- 

 nection with the floor of the third ventricle. The animals selected 



Fig. 2. 



were the common fowl, rabbit, rat, sheep, cat and dog. In all cases 

 the serial sections used for the reconstructions were obtained from 

 tissues fixed in Orth's fluid and stained with Haematoxylon-eosin. 

 For purposes of control, series taken from tissues fixed in the Perenyi, 

 Carnoy, Zenker and Müller fluids were also used, as well as complete 

 series prepared according to the Cajal's silver method. These latter 

 afforded excellent pictures of the fiber connections between the neural 

 and glandular portions of the hypophysis. Weigert's haematoxylon in 

 combination with eosin proved a valuable stain as did also R. Traina's 

 acridin-red water-blue. 



