METABOLIC GRADIENTS 



55 



axis in single cells. Figs. 3-7 show the course^oLdeath 

 and disintegration along the axis in Stentor coeruleus, 

 one of the common infusoria. Fig. 3 represents the 

 normal animal in extended condition, showing the 



Figs. 3-7. — Axial susceptibility gradient of Stentor in cyanide: 

 Fig. 3, intact animal; Fig. 4, beginning of disintegration; Figs. 5-7* 

 successive stages of disintegration. 



flattened peristome at the free apical end with its spiral 

 of large cilia, the shorter ciUa over other parts, the longi- 

 tudinal striations or fibrillae, and the elongated basal 

 region with organ of attachment. 



