Plate IV. Electron micrographs of sections of basal parts of 

 the membranelles of Eiiplotes. 



(a) Transverse section showing the double rows of cilia that 

 make up the membranelles. The basal bodies at the lower 

 left are interconnected by fine filaments, and bundles of rootlets 

 run away to the right from the basal bodies. From Roth (1957). 



X 22,000. 



(b) Longitudinal section through the basal region of a row of 

 cilia from a membranelle. The central fibrils of the shaft run 

 into a central granule at the level of the cell surface, below w^hich 

 is a transverse plate across the cilium dividing the shaft from 

 the basal body. In the lumen of the basal body is a fibrous 

 structure which may represent continuations of the central 

 fibrils of the shaft. The basal bodies are interconnected at 

 about the middle and at the proximal end, where there are 

 thickenings of the peripheral fibrils. From Roth (1956). 



X 48,000. 



