118 DR. E. KLEIN. 
by Afanassiew (‘Archiv f. Mikr. Anat.,’? Band xiv, 3rd_ part). 
Seeing that these concentric bodies occur in all the glands of 
adult animals that I have examined, and seeing that the struc- 
ture of the follicles remains the same, 7.e. their tissue does not 
undergo the fatty and connective-tissue degeneration that always 
occurs in the follicles during the involution of the thymus gland 
in other animals, it follows that Afanassiew’s view of the 
degeneration of the follicles being caused, or rather initiated, by 
the concentric bodies cannot be sustained. 
