DECENNIAL PUBLICATIONS, X 



PLATE XX 



Proximal clear 

 zone contain- 

 ing proximal 

 mass of 

 secretion 

 Distal clear 

 zone contain- 

 ing ili-tnl mass 

 of secretion 



m- K :/ 



Band of 

 cytoplasm 



separating two 

 masses of 

 secretion 



Cells in \\ hirh 

 the two masses 

 are becoming 

 confluent 



FIG. 2 



^ f, >/.''. /:- ^^o, ' 



L. H. WILDER 



FIG. 3 



FIG. 4 



