Experimental Operations on tlie I'ituiiary 



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Fig. 44.— Section of the jntuitavy from dog 22, 57 days after oiieration, 

 showing the di-splaceuu-nt of the pars anterior and pars posterior 

 caused by an imitation tumour. (Photomicrograph x 15.) 



Fig. 45.— Section of the pituitary of dog 20, 98 days after operation, 

 showing a cyst in the pars anterior caused by an imitation tumour. 

 (Photomicrograph x 15.) 



