HYPOPHYSIS CEREBRI OF CALIFORNIA GROUND-SQUIRREL 203 



SUMMARY 



1. The ground-squirrel hypophysis has a solid nervous lobe and 

 a patent infundibulum, the cavity of which extends as far as the 

 nervous lobe. 



2. The gland cells, judged from their staining reactions, are 

 in all probability of the same cell type in different phases of 

 functional maturity. 



3. The colloid cysts of the pars distalis are small and very 

 numerous, those in the pars infundibularis being larger, but fewer 

 in number. Relatively, the pars infundibularis contains the 

 greater amount of colloid, but, absolutely, I believe the pars 

 distalis exceeds in this respect. 



4. No continuity between the cysts and cleft was seen and in 

 no cases were cilia found in either. 



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