434 



ELIZABETH KIXXEY. 



PLATE III. 



FIG. 7. Section of cell taken from posterior part of middle region of gland 

 fixed by the Regaud method and stained with acid fuchsin, methyl green. Cross 

 section. Hyalin layer appears irregular and contains vacuoles along the border 

 toward cell. Mitochondria slightly shorter. Two columns of secretion chance to 

 be present at this level. 



FIG. 8. Cross section of tubule from anterior conducting region of gland 

 fixed by the Regaud method and stained with acid fuchsin, methyl green. Mito- 

 chondria present as granules. Intima definite. 



FIG. 9. Cross section from anterior conducting region of tubule fixed by the 

 Champy method and stained with iron haematoxylin, acid fuchsin. Mitochondria 

 appear as granules. Intima well defined, two types of secretion present. 



FIG. 10. Longitudinal section of tubule fixed by the Champy method and 

 stained with iron haematoxylin, acid fuchsin. Section taken from anterior part 

 of the middle region at edge of lumen. Fibers appear extending from the edge of 

 one cell to the edge of the cell opposite. 



FIG. ii. Longitudinal section of cell from secreting region of tubule fixed by 

 the Mann-Kopsch method, unstained. Numerous fine black granules fill cytoplasm 

 and tend to concentrate toward the outer cell boundary. 



FIG. 12. Cross section of cell from middle region of tubule fixed by the Regaud 

 method, stained with acid fuchsin, methyl green. Mitochondria are shorter and 

 less definitely orientated. Clear hyalin intima present along the edge toward 

 lumen. 



Symbols: /., fibers; g., granules; mg., mitochondrial granules; p., tunica 

 propria; si., inner layer of secretion; so., outer layer of secretion. 



