: a 
ot 
slimy substance. Careful examination with reagents shows that this 
is a cellulose, and that it does not completely block the passage-way 
. € > 
vacuoles disappear, and are replaced by a dense granular dark greenish- 
brown protoplasm. ; 
“These cells now show a great activity in the production of 
numerous branches in the usual way; but it is the upper two alone 
s. The central cells of the glomerule thus form od 
are very large and bladder-like. The outer part of the ball is compos h 
of innumerable radiating rows of small cells, the end cell of eae 
6 
Pe ee ee ee ye aD, 
