PLATE 8 



EXPLANATION OF FIGURES 



28 A median sagittal section through the infundibular process and the hypo- 

 physial components of a 38/3.5 normal frog tadpole. Liver diet. Fixed 63 days 

 after the operative stage X227. 



29 A median sagittal section through the infundibular process and the hypo- 

 physial components of a 43/0.1 albino frog tadpole (specimen 10). Liver diet. 

 Fixed 101 days after epithelial hypophysectomy. X227. 



30 A median sagittal section through the infundibular process and the hypo- 

 physial components of a 36/4.2 'partial' albino frog tadpole (specimen p 1). Liver 

 diet. Fixed 0(5 days after the attempted epithelial hypophysectomy. X227. 



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