Figure 5. Transmission electron micrograph of Anacystis sp. containing large 

 polyphosphates bodies (PP). (X53,000). 



Figure 6. Transmission electron micrograph of Scenedesmus sp. showing large 

 polyphosphate bodies (PP) in the vacuole. (X23,000). 



Figure 7. Light micrograph of Scenedesmus sp. stained for polyphosphates by 

 the technique of Ebel et al . (1958) . Material is from a natural phyto- 

 plantkon assemblage enriched with phosphorus and heavy metals. 

 (XI, 700). 



Figure 8. Light micrograph of Fragilaria crotonensis Kitton stained for poly- 

 phosphates by the technique of Ebel et al . (1958) . Material is from a 

 natural phytoplankton assemblage enriched with phosphorus and heavy 

 metals. (X800). 



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